TM TANDBERG Super DLT Product manual Revision 2 June 2002 - 432589-01
SDLT 220 and SDLT 320 Product Manual Copyright Copyright © 2002 by Tandberg Data.. All rights reserved. Trademarks Quantum, the Quantum logo, DLTtape, the DLTtape logo, Super DLTtape and the Super DLTtape logo are trademarks of Quantum Corporation registered in the U.S.A. and other countries. Laser Guided Magnetic Recording (LGMR) and Pivoting Optical Servo (POS) are trademarks of Quantum Corporation.
SDLT 220 and SDLT 320 Product Manual Revision History Revision 422216-01 Date (YYMMDD) 020610 Summary of Changes Initial Release
SDLT 220 and SDLT 320 Product Manual User Manual Statements for Class A Equipment (Internal Tape System) This equipment generates, uses, and may emit radio frequency energy. The equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against radio frequency interference in a commercial installation.
SDLT 220 and SDLT 320 Product Manual User Manual Statements for Class B Equipment (Tabletop Tape System) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
SDLT 220 and SDLT 320 Product Manual from device to device and needs to be obtained from the EMC (Electromagnetic Compatibility) group or product manager. This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Table of Contents CHAPTER 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Purpose and Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Referenced Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Structure of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents SDLT Cartridge Tape Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Key Differences Between the SDLT 220 and the SDLT 320 . . . . . . . . Tandberg Data Diagnostics Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . TapeAlert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHAPTER 3 2-10 2-11 2-12 2-13 Drive Specifications . . . . . . . . . . . . . . . . . . . . . . . 3-1 Product Specifications . . . . . . . . .
Table of Contents Installing the Internal Tape Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . Securing the Internal Tape Drive . . . . . . . . . . . . . . . . . . . . . . . . Connecting the Internal Drive Cables. . . . . . . . . . . . . . . . . . . . . Configuring and Installing a Tabletop Drive. . . . . . . . . . . . . . . . . . . . . Configuring the Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing the Tabletop Drive . . . . . . . . . . . . . . . . . . . .
Table of Contents SCSI Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Signal Bus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10 CHAPTER 7 Regulatory Compliance . . . . . . . . . . . . . . . . . . . . 7-1 Safety Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables CHAPTER 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Table 1-1. Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 CHAPTER 2 SDLT 220/320 Product Information . . . . . . . . . . . 2-1 Table 2-1. A Comparison of SDLT 220 and SDLT 320 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 CHAPTER 3 Drive Specifications . . . . . . . . . . . . . . . . . . . . . . .
List of Tables CHAPTER 4 Installing Your Tape Drive . . . . . . . . . . . . . . . . . . 4-1 Table 4-1. SCSI ID Address Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9 Table 4-2. MSE and SE Mode SCSI Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14 Table 4-3. MSE LVD Mode SCSI Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16 Table 4-4.
List of Figures CHAPTER 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 CHAPTER 2 SDLT 220/320 Product Information . . . . . . . . . . . 2-1 Figure 2-1. SDLT 220/320 Drive System (Photographs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Figure 2-2. SDLT 220/320 Drive System (CAD Diagram in Perspective) . . . . . . . . . . . . . . . . . . . . . 2-4 Figure 2-3. SDLT 220/320 Modular Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures CHAPTER 7 Regulatory Compliance . . . . . . . . . . . . . . . . . . . . 7-1 APPENDIX A SDLT I Tape Cartridge . . . . . . . . . . . . . . . . . . . . . A-1 Figure A-1. Figure A-2. Figure A-3. Figure A-4. End View of SDLT I Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom View of SDLT I Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Write-Protect Switch on Tape Cartridge . . . . . . . . .
CHAPTER 1 Introduction 1.1 Purpose and Scope This product manual is a comprehensive source of information about the SDLT 220 and SDLT 320 cartridge tape drive systems; it describes both the internal and tabletop versions of the Super DLTtape™ tape system.
CHAPTER 1: Introduction 1.2 Referenced Documents • • • Super DLT SCSI Interface Guide (432614 rev. 01 or later) Super DLT Design and Integration Guide (432588 rev. 01 or later) Super DLTtape™ Interactive Library Interface Specification 1.3 Related Documents • DLT Script Tool User Guide 1.4 Structure of this Manual • Chapter 1, Introduction, is the chapter you are currently reading.
CHAPTER 1: Introduction • Appendix A, SDLT I Cartridge, provides tape cartridge information for the SDLT I cartridge including handling and inspection procedures, information on the write-protect switch, and how to load and unload a tape cartridge. • Appendix B, DLT IV Cartridge, includes the cartridge insertion and ejection guidelines. • Glossary provides definitions for technical terms and acronyms that are used throughout the document.
CHAPTER 1: Introduction 1.5 Conventions This manual uses the following conventions to designate specific elements: Table 1-1.
CHAPTER 1: Introduction 1.7 Reader Comments Tandberg Data is committed to providing the best products and service. We encourage your comments, suggestions, and corrections for this manual. Please send all comments to: Tandberg Data ASA P.O.
CHAPTER 1: Introduction
CHAPTER 2 SDLT 220/320 Product Information This chapter describes the features of the Tandberg Data Super DLTtape system. This chapter covers the following topics: • “Overview” describes basic features of the system. • “SDLT 220/320 Product Features” lists key features of the SDLT family of tape drives. • “SDLT 220/320 Technology” includes photographs of the tape drive, and introduces important basic features.
CHAPTER 2: SDLT 220/320 Product Information provides 160 GB of storage capacity with a transfer speed of 16MB/second (native). To view a succinct comparison of the two models, refer to “Key Differences Between the SDLT 220 and the SDLT 320” on page 2-11. For detailed engineering specifications (for both the SDLT 220 and 320), refer to CHAPTER 3, “Drive Specifications.” 2.
CHAPTER 2: SDLT 220/320 Product Information 2.3 SDLT 220/320 Technology SDLT incorporates various new state-of-the-art technologies that contribute to the SDLT architecture. Some of these ideas are trademarked, others are patented. The following subsections introduce the important technologies that together, comprise the SDLT tape system. 2.3.1 Laser Guided Magnetic Recording The SDLT system ( Figure 2-1 and Figure 2-2) is based on Laser Guided Magnetic Recording•••• (LGMR) technology.
CHAPTER 2: SDLT 220/320 Product Information Figure 2-2. SDLT 220/320 Drive System (CAD Diagram in Perspective) 2.3.2 Pivoting Optical Servo Pivoting Optical Servo (POS) is a optically-encoded servo system, which combines high-density magnetic read/write data recording with laser servo guiding. The POS is designed for high-duty-cycle applications, which decreases cost and increases user convenience.
CHAPTER 2: SDLT 220/320 Product Information 2.3.4 Advanced Partial Response Maximum Likelihood Improving on Partial Response Maximum Likelihood (PRML) technology, the advanced PRML channel technology was developed with to bring new levels of performance and capacity to high-performance linear tape products. This provides high-encoding efficiency recording densities for greater capacity and performance that enables SDLT to substantially increase transfer rates and capacity. 2.3.
CHAPTER 2: SDLT 220/320 Product Information 2.4 SDLT 220/320 Modular Design SDLT is designed as a total system. The system includes a complex interaction of a number of important components including such items as the tape path, tape heads, media, cartridge, and host interface.
CHAPTER 2: SDLT 220/320 Product Information the only two modules that are field replaceable. Customer adjustments to the TCM, DCM, or EIM are not allowed, and will void the drive’s warranty. 2.4.1 Data Control Module The Data Control Module (DCM) contains several of the functions and features of LGMR technology, which is at the heart of the SDLT technology. Of the five technologies that constitute the LGMR technology, two are found in the DCM. These are the POS and the MRC heads.
CHAPTER 2: SDLT 220/320 Product Information 2.4.2 Tape Control Module The Tape Control Module (TCM) implements the functions required to buckle and unbuckle the tape and control the tape motion. The TCM consists of a variety of components: • TCM PCBA (Printed Circuit Board Assembly) • Base Plate • Cartridge Receiver • Positive Engagement Tape Leader Buckling Mechanism. Other components include the tape supply motor assembly and the floor plate assembly.
CHAPTER 2: SDLT 220/320 Product Information cartridge receiver assembly reverses the process and automatically ejects the tape a fixed distance from the front of the drive. There is no longer a manual lock and release handle to operate when loading and unloading the cartridge. This “soft load” capability makes SDLT easier for customers to use in both stand-alone applications and automated tape libraries.
CHAPTER 2: SDLT 220/320 Product Information 2.4.4 Electronic Interface Module The Electronic Interface Module (EIM) is the electronic heart of the SDLT system. It provides the main control function for the system and the interface from the system to the host computer. The EIM provides the Advanced PRML feature of Quantum’s SDLT technology; advanced PRML is described in “Advanced Partial Response Maximum Likelihood” on page 2-5.
CHAPTER 2: SDLT 220/320 Product Information 2.5 Key Differences Between the SDLT 220 and the SDLT 320 Table 2-1 compares important features in the SDLT 220 and the SDLT 320 products. Table 2-1.
CHAPTER 2: SDLT 220/320 Product Information 2.6 Tandberg Data Diagnostics Tools Tandberg Data frequently provides new and updated tools to use with its tape drives. For example: SDLT Update This utility is a SCSI-based Windows application that allows you to load tape drive firmware and create code upload tapes. GSLink Allows you to quickly diagnose the integrity of the drive using an infrared (wireless) communication connector located on the front panel of the tape drive.
CHAPTER 2: SDLT 220/320 Product Information 2.7 TapeAlert SDLT drives are delivered with TapeAlert features built in. The internal SDLT firmware constantly monitors the device’s hardware and media, checking for errors and potential difficulties. Any problems identified are flagged on the SCSI log page, where 64 bytes have been reserved for use by TapeAlert.
CHAPTER 2: SDLT 220/320 Product Information
CHAPTER 3 Drive Specifications This chapter describes various specifications that apply to the Tandberg Super DLTtape system, which include: • “Product Specifications” provides the product specifications for the SDLT 220/320 tape drives. • “Functional Specifications” provides the functional specifications for the SDLT 220/320 tape drives. • “Environmental Specifications” provides the environmental specifications for the SDLT 220/320 tape drives.
CHAPTER 3: Drive Specifications 3.1.1 Interface Type The SDLT drive is available in either of two possible SCSI interface versions; these versions provide three possible SCSI interface types: • • Multimode Single-Ended (MSE) provides one of two interfaces: ! Low Voltage Differential (LVD) running at 80 MB/second, or ! Single Ended (SE) running at 40 MB/second. High Voltage Differential (HVD) running at 40 MB/second.
CHAPTER 3: Drive Specifications 3.1.3 Storage Capacity Table 3-2 provides native and compressed capacity ranges for the SDLT I tape cartridge: Table 3-2. SDLT 220/320 Storage Capacity SDLT 220 SDLT 320 Native Storage Capacity 110 GB 160 GB Compressed Storage Capacity 220 GB (2:1 compression ratio) 320 GB (2:1 compression ratio) In accordance with industry practice, a typical compression ratio of 2:1 is quoted.
CHAPTER 3: Drive Specifications 3.1.5 Data Integrity SDLT data transfer errors are extremely rare; data integrity for the overall tape system is shown in Table 3-3. Table 3-3.
CHAPTER 3: Drive Specifications 3.1.6 Maximum Data Transfer Rate The maximum sustained (and burst) data transfer rates for SDLT drives are shown in Table 3-4. Table 3-4.
CHAPTER 3: Drive Specifications 3.1.7 Reliability (MTBF) Mean time between failures (MTBF) for the overall tape system is projected to be 250,000 hours. Head life is a minimum of 30,000 tape motion hours and an average of 50,000 tape motion hours. Media durability is 1,000,000 passes. NOTE: Tandberg Data does not warrant that predicted MTBF is representative of any particular unit installed for customer use. Actual figures vary from unit to unit. 3.1.
CHAPTER 3: Drive Specifications 3.2.1 SDLT 220/320 Performance Data Table 3-6 provides performance data for the SDLT system. For a comparison of SDLT 220/320 storage capacities, refer to Section 3.1.3, “Storage Capacity” on page 3-3. Table 3-6.
CHAPTER 3: Drive Specifications 3.2.2 Shock and Vibration Specifications The following tables provide non-operating and operating shock and vibration specifications for the SDLT system. Table 3-7. Non-Operating Shock Specifications (Unpackaged) Shock (Unpackaged) Pulse Shape Square wave ½ sine pulse Peak Acceleration 40 G 140 G Duration 10 ms (180 inches/second) 2 ms Application X,Y,Z axes, twice in each axis (once in each direction) Table 3-8.
CHAPTER 3: Drive Specifications Table 3-9. Non-Operating Vibration Specifications Vibration (Unpackaged) Type Sine Sweep Frequency Range 5 - 500 - 5 Hz Upward and downward sweep Acceleration Level 0.02" DA 1.0 G Between 5 and 31 Hz (crossover) Between 31 and 500 Hz (crossover) Application X,Y,Z axes Sweep rate = ½ octave /minute Type Random Frequency Range 10 - 500 Hz Acceleration Level 2.0 G PSD Envelope 0.
CHAPTER 3: Drive Specifications Table 3-10. Operating Shock and Vibration Specifications Shock Pulse Shape ½ sine pulse Peak Acceleration 10 G Duration 10 ms Application X,Y,Z axes, twice in each axis (once in each direction) Vibration Type Sine Sweep Frequency Range 5 - 500 - 5 Hz Upward and downward sweep Acceleration Level 0.25 G 0.010" DA Between 22 and 500 Hz Between 5 and 22 Hz (crossover) Application X,Y,Z axes Sweep rate = 1.0 octave per minute 3.2.
CHAPTER 3: Drive Specifications Table 3-11. Current and Power Specifications Mode 5 V Current (A) MaxPk1 MaxRms2 Standby / Idle 3.2 3.0 2.9 0.6 0.5 0.4 20 19 34 29 Media Loading / Unloading 3.8 3.1 2.9 4.8 1.0 0.7 25 24 38 33 220/320 Write– Motor Start8 6.1 3.1 3.0 4.8 1.0 0.7 25 24 33 30 220/320 Write– Streaming 6.3 4.3 3.8 2.1 0.7 0.
CHAPTER 3: Drive Specifications 3.2.4 Tape System Recording Method The SDLT 220 tape system uses the Partial Response Maximum Likelihood (PRML) 32/33 encoding method for reading/writing SDLT format. The SDLT 320 tape system uses the PRML 32/33 encoding method for reading/ writing SDLT 320 and 220 format.
CHAPTER 3: Drive Specifications 3.3 Environmental Specifications The SDLT 220/320 tape drive operates in environments that include general offices and workspaces with systems capable of maintaining standard comfort levels. The following subsections provide the environmental specifications for the SDLT systems (both the internal and the tabletop configurations). For long-term troublefree operation, it is strongly recommended that SDLT tape drives be used in a clean, smoke-free environment. 3.3.
CHAPTER 3: Drive Specifications 3.3.2 Temperature and Humidity The ambient operating environment for the tape drive may not exceed the limits shown in Table 3-12. (The specifications shown in the table are valid for both the internal and tabletop tape drives .) Table 3-12.
CHAPTER 3: Drive Specifications 3.3.4 Altitude Both the internal and tabletop tape drives operate in normal pressures from –500 to 10,000 feet when operated within the ambient operating environments specified in “Temperature and Humidity” on page 3-14. The drive will operate to 30,000 feet for temperatures within 15 ± 5 °C. 3.3.5 Particulate Contamination Limits The ambient operating environment for the tape drive may not exceed the particulate counts shown in Table 3-14. Table 3-14.
CHAPTER 3: Drive Specifications Table 3-15. Super DLTtape I Media Specifications Description Specifications Width 0.5 in. Magnetic Coating 300 nm metal particle Length 1800 feet (1765 feet usable) Coercivity 1800 Oe Cartridge Dimensions 4.1 in x 4.1 in x 1.0 in Shelf Life 30 years min. @ 20°C & 40% RH (non-condensing) Usage 1,000,000 passes (typical office/computer environment) Cartridge Housing Color Dark Green Table 3-16.
CHAPTER 3: Drive Specifications 3.4.1 Backward-Read Compatibility Transfer Rates Both the SDLT 220 and 320 drives feature an optional backward-read compatibility (BRC) mode. When in BRC mode, the drives are capable of reading DLTtape IV tapes with DLT4000, DLT7000, DLT8000, and DLT 1/VS80 formats. The BRC transfer rates for the SDLT drive are listed in Table 3-17. Table 3-17.
CHAPTER 3: Drive Specifications
CHAPTER 4 Installing Your Tape Drive This chapter describes how to install the internal tape drive into a system. This includes configuration jumper settings, connector pin assignments, installation instructions, power and signal cabling descriptions, and operating instructions. This chapter also includes information on configuring and connecting the tabletop version of the drive into a system.
CHAPTER 4: Installing Your Tape Drive 4.1 Safety, Handling, and ESD Protection Inappropriate or careless handling of tape systems may result in damage to the product. Follow the precautions and directions to prevent damaging the tape system. In addition, follow the pre-installation guidelines to ensure that you have the correct hardware for your system configuration. 4.1.1 Safety Precautions For your safety, follow all safety procedures described here and in other sections of the manual. 1.
CHAPTER 4: Installing Your Tape Drive 4.1.2 Handling Damage to the tape system can occur as the result of careless handling, vibration, shock, or electrostatic discharge (ESD). For more details about ESD, refer to “Electrostatic Discharge Protection” on page 4-4. Follow these guidelines to avoid damage to the drive: CAUTION: Always handle the tape system with care to avoid damage to the precision internal components. Do not place hands inside the tape drive’s receiver area.
CHAPTER 4: Installing Your Tape Drive 4.1.3 Electrostatic Discharge Protection Several electrical components of the tape system are sensitive to static electricity and Electrostatic Discharge (ESD). Even a static buildup or discharge that is too slight to feel can be sufficient to destroy or degrade a component’s operation.
CHAPTER 4: Installing Your Tape Drive 4.2 Pre-Installation Guidelines Before you begin, check the contents of the box, record the applicable numbers, check for SCSI controller and cable compatibility, and confirm software and operating system compatibility. Finally, check the drive to make sure it is operating properly before installing it in a system. 1. Unpack and review the contents of the box to ensure that nothing has been damaged. If items have been damaged, contact your drive provider. 2.
CHAPTER 4: Installing Your Tape Drive 4.3 Configuring and Installing an Internal Tape Drive This section provides information for configuring and installing a tape drive into a system. See “Configuring and Installing a Tabletop Drive” for information on configuring and installing a tabletop tape drive. CAUTION: Before you begin, review the safety, ESD, and handling precautions described at the beginning of this chapter to avoid personal injury or damage to equipment.
CHAPTER 4: Installing Your Tape Drive 4.3.1 Setting the Internal Drive SCSI ID Each device on the SCSI bus must have a unique SCSI ID address assigned to it. For specific recommendations for assigning SCSI IDs, refer to the system or SCSI controller documentation.
CHAPTER 4: Installing Your Tape Drive Controller Diag Port (8 pin) (Diagnostic use only) Configuration Jumper (Omit jumper on Pins 1-2 to enable wide SCSI) Power Connector (4 pin) SCSI Port (68 pin) Loader Connector RS-422 (8 pin) SCSI ID Jumper Block (No jumpers on this block = default SCSI ID of 5) Pin 1 TERMPWR Block (Install jumper on Pins 1-2 to enable TERMPWR) !"Denotes Pin 1 orientation * Figure not drawn to scale Figure 4-1. Connectors on the Back Panel Figure 4-2.
CHAPTER 4: Installing Your Tape Drive Table 4-1.
CHAPTER 4: Installing Your Tape Drive 4.3.2 Configuring the Internal Drive for TERMPWR A SCSI bus must be terminated at each end of the bus. All signals not defined as RESERVED, GROUND, or TERMPWR shall be terminated exactly once at each end of the bus. At least one device must supply terminator power (TERMPWR). To enable TERMPWR, install the jumper across Pins 1 and 2 (Figure 4-3) on the TERMPWR jumper block. Remove the jumper to disable TERMPWR.
CHAPTER 4: Installing Your Tape Drive Figure 4-4. SDLT 220/320 — Two Views (Front + Side + Top and Back + Side + Top) Securing the Internal Tape Drive This section describes how to mount and secure the drive in the system. NOTE: In some system configurations it may be more convenient to connect the SCSI bus and power cables to the drive before securing it in the system. Because of the variety of mounting possibilities for tape drives, the instructions presented here are general in nature.
CHAPTER 4: Installing Your Tape Drive 2. Using four #6-32 UNC-2B screws, secure the tape drive in the bay or chassis. Figure 4-5. Internal Drive Mounting Locations – Side and Bottom Views Connecting the Internal Drive Cables The three connectors on the back of the internal SDLT drive that are discussed in this section are: 1) SCSI, 2) power, and 3) optional library/loader connectors. For the tabletop model, typical connectors (power cords) are shown in Figure 4-8 on page 4-23.
CHAPTER 4: Installing Your Tape Drive Pin assignments for the three possible SCSI connectors are listed in a series of tables: Multimode Single-Ended (MSE) Single Ended (SE) mode in Table 4-2 on page 4-14, MSE Low Voltage Differential (LVD) mode in Table 4-3 on page 4-16, and High Voltage Differential (HVD) mode in Table 4-4 on page 4-17. Pin assignments for the power connector are listed in Table 4-5 on page 4-19. 1.
CHAPTER 4: Installing Your Tape Drive Figure 4-6. Connectors on the Back Panel (Drawn to Scale) Table 4-2.
CHAPTER 4: Installing Your Tape Drive Table 4-2.
CHAPTER 4: Installing Your Tape Drive Table 4-3.
CHAPTER 4: Installing Your Tape Drive Table 4-3. MSE LVD Mode SCSI Connector Pin Assignments (Continued) +DB(8) 31 65 -DB(8) +DB(9) 32 66 -DB(9) +DB(10) 33 67 -DB(10) +DB(11) 34 68 -DB(11) Table 4-4.
CHAPTER 4: Installing Your Tape Drive Table 4-4.
CHAPTER 4: Installing Your Tape Drive Table 4-5. 4-Pin Power Connector Pin Assignments Pin Number Signal Name 1 +12 VDC 2 Ground (+12V return) 3 Ground (+5V return) 4 +5 VDC Table 4-6.
CHAPTER 4: Installing Your Tape Drive 4.4 Configuring and Installing a Tabletop Drive This section provides instructions for configuring and installing the SDLT tabletop drive. 4.4.1 Configuring the Drive Figure 4-7 shows the location of the controls and connectors for the tabletop drive. This model tape drive is normally configured to meet customer specifications before leaving the factory, so should not require any internal configuration changes on-site. Figure 4-7.
CHAPTER 4: Installing Your Tape Drive desired SCSI ID. The top button increases the ID number, the bottom button decreases the ID number. TERMPWR The TERMPWR setting for the tabletop drive is preconfigured at the factory according to specific customer requirements. TERMPWR is not selectable on-site. 4.4.2 Installing the Tabletop Drive Tabletop drive installation consists of connecting SCSI bus and power cables.
CHAPTER 4: Installing Your Tape Drive 4. Align the appropriate SCSI cable to its matching connector on the drive. Carefully connect the cable, to avoid bending or damaging the connector pins. Check the SCSI cable and termination connections and ensure that they are attached correctly and seated firmly. 5. Snap the wire cable clamps into place to secure the cables. AC Power Cable An AC power cord is supplied with each tabletop unit.
CHAPTER 4: Installing Your Tape Drive Figure 4-8. AC Power Cord Connector Types The power supply of the tabletop unit has an auto-sensing feature; no adjustment or switch setting changes are required for different AC sources. Refer to Figure 4-7 and Figure 4-8. Connect one end of the AC cord into the power connector on the back of the tabletop drive; connect the other end of the cord to the AC outlet. Upon completion, proceed to the next section to confirm the installation. 4.
CHAPTER 4: Installing Your Tape Drive
CHAPTER 5 Using Your Tape Drive This chapter describes how to start using your tape drive system. This includes making a trial back-up, cleaning the tape mechanism, and various troubleshooting information. This chapter also includes information on the LEDs and buttons on the front panel of the system. This chapter covers the following topics: • “Power On Self Test” describes the sequence of activities that occur when power is first applied to the drive.
CHAPTER 5: Using Your Tape Drive 5.1 Power On Self Test When power is applied to the tape system, the system performs a Power On Self Test (POST). POST completes in approximately ten seconds. While POST is running, the tape system responds BUSY to SCSI commands. The tape system also responds to various SCSI messages during POST. During this time, if a host tries to negotiate Synchronous or Wide transfers, the tape system will negotiate to Asynchronous or Narrow.
CHAPTER 5: Using Your Tape Drive NOTE: You can review specific instructions for loading a tape cartridge in Appendix A, “SDLT I Tape Cartridge,” and Appendix B, “DLT IV Tape Cartridge.” 5.3 Overwriting 320-Formatted Cartridges in a 220 Drive This section describes what happens when a 320-formatted cartridge is inserted into an SDLT 220 drive and the drive is “instructed” to overwrite the cartridge with a 220 format. NOTE: This discussion applies only to SDLT 220 drives (firmware revision V45 and higher).
CHAPTER 5: Using Your Tape Drive 5.4 Updating the Firmware When you need to update the firmware in a drive, you can do it either of two ways: • Build a firmware image tape; this tape can be used in either a manual firmware update or in a Library setting. • Update the firmware over the SCSI bus. Both of these approaches are described briefly in the following subsections. NOTE: For more information about the suite of diagnostics tools provided by Tandberg Data, refer to Tandberg Data’s web site, www.
CHAPTER 5: Using Your Tape Drive 5.4.2 Making a FUP/CUP Tape SDLT Update is a tool that allows you to update a drive’s firmware (using the SCSI bus), or to create a code update (CUP/FUP) tape for an SDLT drive. SDLT Update is available on Tandberg Data’s web site, http://www.tandberg.com. Follow the path Support > DLT Support and download the SDLT Update package. For detailed instructions about how to make the tape, refer to that tool’s built-in online help. 5.4.
CHAPTER 5: Using Your Tape Drive NOTE: The Firmware Upgrade will fail the microcode update process if the firmware personalities do not match; this will be noted in the history log, along with the reason for the failure. 7. Wait several minutes for the update process to complete. The Amber and Green LEDs will blink the entire time that memory is being updated. 8. When the update is complete, the drive resets itself and goes through POST. The tape is rewound, unloaded, and ejected from the drive.
CHAPTER 5: Using Your Tape Drive 5.5 Cleaning the Tape Mechanism This section discusses the SDLT Cleaning Tape, maintenance considerations, and important compatibility issues you need to be aware of. NOTE: Use the SDLT Cleaning Tape if cleaning is indicated through your backup software or when the yellow alert light is ON. Do not clean the drive unless the drive specifically indicates cleaning is necessary. 5.5.
CHAPTER 5: Using Your Tape Drive 5.5.2 When to Use the Cleaning Tape SDLT uses a built-in tape cleaning algorithm in conjunction with a cleaning tape. The SDLT cleaning tape is housed in a plastic case, and is light gray in color. A yellow LED (light) located on the front bezel of the tape drive indicates when cleaning is needed; the location of this LED (and other front bezel LEDs) is shown in Figure 5-1 on page 5-11.
CHAPTER 5: Using Your Tape Drive 5.5.5 Loading the Cleaning Tape Into a Tabletop Drive NOTE: To use the cleaning cartridge in an Autoloader or Library drive, refer to your owner’s manual. Follow these steps to load an SDLT Cleaning Tape into an SDLT tabletop drive: 1. Insert the cleaning cartridge, with the Front Slide Label Slot facing outward, fully into the drive until the drive engages with the cartridge and begins to take up the cleaning media.
CHAPTER 5: Using Your Tape Drive 5.6 Front Panel Controls and LEDs All controls and LEDs are located on the tape drive’s front panel. See Figure 5-1 on page 5-11 for details. Control and LED functionality are described in Table 5-2 and Table 5-3. Use these controls and LEDs to operate the tape system and monitor the tape system’s activities. This section also describes the behavior of the amber-colored LED (formerly Write Protect) on the SDLT 320 drive.
CHAPTER 5: Using Your Tape Drive SDLT 220 SDLT 320 Figure 5-1.
CHAPTER 5: Using Your Tape Drive Table 5-3. LED/Button Front Panel LED/Control Functionality Symbol Write Protect LED (Left on SDLT 220) LED Color Description Amber For the SDLT 320 drive, this LED functions as the “Drive Density Indicator” LED; for the SDLT 220 drive, this LED is the “Write Protect” LED.
CHAPTER 5: Using Your Tape Drive 5.7 Troubleshooting The following subsections provide troubleshooting information that might be helpful should the system fail its Power-On Self Text (POST). Refer to the tape cartridge appendices in this manual (Appendix A, “SDLT I Tape Cartridge” and Appendix B, “DLT IV Tape Cartridge” ) for complete visual inspection instructions for SDLT and DLT cartridges. The web site http://www.superdlttape.com includes much valuable information about SDLT systems. 5.7.
CHAPTER 5: Using Your Tape Drive Table 5-4. System does not recognize the tape system. (cont.) Troubleshooting Chart (Continued) SCSI bus may not be terminated correctly. If tape system is last or only device on bus (except for adapter), make sure terminator is installed on tape system. If tape system is not the last or only device on the bus, check the cable connections and ensure that the bus is properly terminated at each end.
CHAPTER 5: Using Your Tape Drive 5.7.2 Over Temperature Condition An Overtemp condition is defined to be when the calculated Tape Path Temp = 52 degrees C. When this condition is detected, the tape is rewound, unloaded, and ejected from the drive. (As long as the drive is not mounted in a tape automation library, the tape is ejected.) SCSI status will indicate the drive is in the over temperature condition.
CHAPTER 5: Using Your Tape Drive
CHAPTER 6 SCSI Description This chapter covers the following topics: • “SCSI Overview” introduces the SCSI specification. • “SCSI-2 Commands” lists the SCSI-2 commands implemented by SDLT 220/320. • “SCSI-3 Commands” lists the SCSI-3 commands implemented by SDLT 220/320. • “Parity” defines the meaning of data parity checking. • “Signal States” defines the meaning of SCSI signal values and SCSI IDs. • “SCSI Signals” defines SCSI signals and provides bus timing values. 6.
CHAPTER 6: SCSI Description Important features of SCSI-2 implementation include the following: • Efficient peer-to-peer I/O bus with up to 15 devices • Asynchr onous transfer rates that d epend only on d evice implementation and c able length • Logica l addr essing for all da ta blocks (rather than physical addr essing) • Multiple initiators and multiple targets • Distributed arbitration (bus c ontention logic) • Command set enhancement.
CHAPTER 6: SCSI Description 6.2 SCSI-2 Commands ANSI classifies SCSI commands as mandatory, optional, or vendor-specific. The mandatory and optional SCSI-2 commands implemented for the drives are summarized in Table 6-1. Table 6-1. Implemented ANSI SCSI-2 Commands Command Code Class Description ERASE 19h Mandatory Causes part or all of the tape medium to be erased, beginning at the current position on the logical unit. INQUIRY 12h Mandatory Requests that information be sent to the initiator.
CHAPTER 6: SCSI Description Table 6-1. Implemented ANSI SCSI-2 Commands (Continued) Command Code Class Description READ BUFFER 3Ch Optional Used in conjunction with the WRITE BUFFER command as a diagnostic function for testing target memory and the integrity of the SCSI bus. This command does not alter the medium. READ POSITION 34h Optional Reports the current position of the logical unit and any data blocks in the buffer.
CHAPTER 6: SCSI Description 6.3 SCSI-3 Commands ANSI classifies SCSI commands as mandatory, optional, or vendor-specific. The mandatory and optional SCSI-3 commands implemented for the drives are summarized in Table 6-2. Table 6-2. Implemented ANSI SCSI-3 Commands Command Code Class Description PERSISTENT RESERVE IN 5Eh Optional Used to retrieve from the drive information about persistent reservations and registrations.
CHAPTER 6: SCSI Description 6.4 Parity Parity is a method of generating redundant information that can be used to detect errors in stored or transmitted data. Data transmitted across the SCSI interface is protected by redundant parity bits: • One bit for the 8-bit narrow SCSI implementation • Two bits for the 16-bit wide SCSI implementation. These parity bits detect errors in transmission across SCSI and trigger a resend of the bad data. 6.
CHAPTER 6: SCSI Description Table 6-3.
CHAPTER 6: SCSI Description 6.5.2 SCSI IDs SCSI permits a maximum of 16 devices (the host adapter is considered one device) when using wide SCSI. Each SCSI device has a unique SCSI ID assigned to it. This SCSI ID provides an address for identifying the device on the bus. On the drive, the SCSI ID is assigned by configuring jumpers or connecting remote switches to the option connector. For detailed instructions about how to set the SCSI ID, refer to “Setting the Internal Drive SCSI ID” on page 4-7. 6.
CHAPTER 6: SCSI Description 6.6.1 SCSI Signal Definitions Table 6-4 lists the SCSI bus signals. Table 6-4. SCSI-2 Bus Signal Definitions Signal Definition ACK (acknowledge) A signal driven by the initiator as an acknowledgment of receipt of data from a target or as a signal to a target indicating when the target should read the data (out) lines. ATN (attention) A signal driven by an initiator to indicate that it has a message to send.
CHAPTER 6: SCSI Description 6.6.2 Signal Bus Timing The ANSI SCSI-2 standard defines the SCSI bus timing values listed in Table 6-5. Table 6-5. SCSI Bus Timing Values Timing Description Value Description Arbitration Delay 2.4 µs Minimum time a SCSI device waits from asserting BSY for arbitration until the DATA BUS can be examined to see if arbitration has been won; there is no maximum time.
CHAPTER 6: SCSI Description Table 6-5. SCSI Bus Timing Values (Continued) Disconnection Delay 200 µs Minimum time that a drive waits after releasing BSY before participating in an ARBITRATION when honoring a DISCONNECT message from the initiator. Hold Time 45 ns Minimum time added between the assertion of REQ or ACK and changing the data lines to provide hold time in the initiator or drive while using standard (slow) synchronous data transfers.
CHAPTER 6: SCSI Description
CHAPTER 7 Regulatory Compliance This chapter describes various regulations that apply to the Quantum Super DLTtape system, which include: • “Safety Regulations” describes compliance with various standards published by international safety organizations. • “Electromagnetic Field Specifications” describes the susceptibility of the SDLT tape drive to ambient electromagnetic fields, and describes the susceptibility of the system to unexpected electrostatic discharge.
CHAPTER 7: Regulatory Compliance 7.1.2 Safety Requirements Safety requirements include: • UL1950: Information Technology Including Electrical Business Equipment • CSA950 C22.2 No. 950: Information Technology Including Electrical Business Equipment • EN60950/IEC 950: Information Technology Including Electrical Business Equipment 7.2 Electromagnetic Field Specifications Tandberg SDLT tape drives are electricaldevices; as such, this equipment generates, uses, and may emit radio frequency energy.
CHAPTER 7: Regulatory Compliance 7.2.2 Electromagnetic Interference Susceptibility Table 7-1 provides regulations and certifications held by the SDLT tape drive for Electromagnetic Interference (EMI). Table 7-1. EMI Regulations and Certifications Type Regulation/Certification EEC Directive 89/336 CE BS6527 (UK) EN55022 (EU) EN55024 (EU) CFR 47, 1995 FCC Rules Part 15B Class B (MDOC) IECS-003 Canada V-3/97.
CHAPTER 7: Regulatory Compliance 7.2.4 Radiated Emissions Limits of radiated interference field strength, in the frequency range from 30 MHz to 1000 MHz at a test distance of 10 meters, are listed in Table 7-3. Table 7-3.
CHAPTER 7: Regulatory Compliance 7.2.5 Susceptibility and ESD Limits The following tables list radiated, magnetic radiated, and conducted susceptibility and ESD failure level limits for the tape system. Table 7-4.
CHAPTER 7: Regulatory Compliance 7.3 Acoustic Noise Emissions The following table provides the tape system’s acoustic noise emission levels, both as noise power and sound pressure. Table 7-6. Acoustic Noise Emissions, Nominal Acoustics – Preliminary declared values per ISO 9296 and ISO 7779/EN27779 Mode Noise Power Emission Level (LNPEc) Internal Version Tabletop Version Idle Not applicable 5.4 Bel Streaming 5.9 Bel 5.
APPENDIX A SDLT I Tape Cartridge From the outside, the SDLT I cartridge looks very similar to the DLT IV cartridges. The basic geometry, write protection switch, and label space are unchanged from the DLT IV cartridge. This simplifies the integration of SDLT into existing operating environments and into automated tape libraries. The SDLT I cartridge is easy to recognize; it has a different color (green) than the DLT IV cartridge (charcoal) and contains a distinctive pattern molded into the shell.
APPENDIX A: SDLT I Tape Cartridge A.1 Tape Cartridge Handling Guidelines Ensure that your tape backup solution performs reliably by following the general handling guidelines described here: • Always keep each tape cartridge in its protective plastic case when it is not in the tape drive. • When carrying tape cartridges in their cases, always orient the cases so that the grooves in the cases interlock. This prevents the cases from slipping apart and falling.
APPENDIX A: SDLT I Tape Cartridge • Avoid unnecessary opening of the cartridge door; this may expose the tape to contamination or physical damage. • Do not use graphite pencils, water-soluble felt pens, or other debris-producing writing instruments on your labels. Never erase a label — replace it. • Make sure you place the unused cartridge labels in the protective box so that you do not inadvertently pick them up along with the cartridge during subsequent usage.
APPENDIX A: SDLT I Tape Cartridge Follow these steps to visually inspect a SDLT I cartridge: 1. Remove the tape cartridge from its protective plastic case. 2. Look at the end of the tape cartridge, holding it as shown in Figure A-1; now look at the bottom of the tape cartridge, holding it as shown in Figure A-2. Reel Lock 1 Figure A-1. End View of SDLT I Cartridge Check the reel lock openings and ensure that the small plastic tabs inside are partially visible. The reel locks are black in color.
APPENDIX A: SDLT I Tape Cartridge 4. Finally, check for proper operation of the tape cartridge’s write-protect switch (Figure A-3). This sliding switch, located on the end of the tape cartridge used for the tape label, should snap smartly back and forth, and the orange tab should be visible when the tape cartridge is set to provide write protection (data on the tape cannot be written over). A.
APPENDIX A: SDLT I Tape Cartridge When a tape cartridge is loaded in the drive and the tape cartridge’s write-protect switch is moved to its write-protected position (to the left as you face the label/ switch side of the tape cartridge), the drive turns on its write-protect indicator LED immediately. If the drive is currently writing to the tape, the write-protect feature does not take effect until after the current WRITE operation completes. Table A-1.
APPENDIX A: SDLT I Tape Cartridge A.4 Loading a Tape Cartridge Complete this subsection to load a tape cartridge into the front of the tape drive; refer to Figure A-4 as needed. 1. Insert the cartridge. 2. Push the cartridge fully into the tape drive. The Drive Status LED blinks to show that the tape is loading. When the tape reaches the BOT marker, the LED lights steadily. The tape is now ready for use. Figure A-4.
APPENDIX A: SDLT I Tape Cartridge A.5 Unloading a Tape Cartridge Complete this subsection to unload a tape cartridge; refer to Figure A-4 on page A-7 as needed. CAUTION: Remove the tape cartridge from the tape drive BEFORE turning off host power. Failure to remove a tape cartridge may result in cartridge or tape drive damage. Do NOT rush removal of the tape cartridge. Wait until the drive ejects the cartridge and the Drive Status LED lights steady before removing the cartridge. 1.
APPENDIX A: SDLT I Tape Cartridge Once a 320-formatted cartridge has become ready in an SDLT 220 drive, the drive will report Density Code 00h (unknown format ) on any valid Mode Sense command. If WRITE commands are given to a ready 320-formatted cartridge in an SDLT 220 drive, the WRITE commands will be honored. On this subsequent overwrite of the 320-formatted cartridge to 220 format, the drive will change the Density Code to 48h (220 format).
APPENDIX A: SDLT I Tape Cartridge
APPENDIX B DLT IV Tape Cartridge The SDLT drive is backward compatible; it ensures backward read compatibility of DLT IV cartridges in the SDLT drive. Data backed up using a DLT IV cartridge in a DLT 8000, DLT 7000, DLT 4000 or DLT/VS80 drive will be retrievable using SDLT-based drives.
APPENDIX B: DLT IV Tape Cartridge B.1 Tape Cartridge Handling Guidelines Ensure that your tape backup solution performs reliably by following both the general handling guidelines described in this subsection. • Always keep each tape cartridge in its protective plastic case when it is not in the tape drive. • When carrying tape cartridges in their cases, always orient the cases so that the grooves in the cases interlock. This prevents the cases from slipping apart and falling.
APPENDIX B: DLT IV Tape Cartridge • Avoid unnecessary opening of the cartridge door; this may expose the tape to contamination or physical damage. • Do not use graphite pencils, water-soluble felt pens, or other debris-producing writing instruments on your labels. Never erase a label—replace it. • Make sure you place the unused cartridge labels in the protective box so that you do not inadvertently pick them up along with the cartridge during subsequent usage.
APPENDIX B: DLT IV Tape Cartridge Follow these steps to visually inspect a DLT cartridge: 1. Remove the tape cartridge from its protective plastic case. 2. Look at the tape cartridge to check for any obvious cracks or other physical damage. Look for broken or missing parts. 3. Gently shake the tape cartridge. Listen for any rattling or sounds of any loose pieces inside the cartridge. If you hear anything loose inside, do not use the cartridge. Figure B-1. End View of DLT Cartridge 4.
APPENDIX B: DLT IV Tape Cartridge 6. Ensure that the tape leader within the tape cartridge is in the correct position. To do this, open the tape cartridge door by holding the DLT cartridge as shown in Figure B-3. Figure B-3. DLT Tape Leader Loop in its Correct Position 7. On the right side corner of the tape cartridge there is a small tab in a cut-out portion of the cartridge. Using your thumb, gently lift up on the tab and swing the door open. 8.
APPENDIX B: DLT IV Tape Cartridge Figure B-4.
APPENDIX B: DLT IV Tape Cartridge B.3 Tape Cartridge Write-Protect Switch Each tape cartridge has a write-protect switch (Figure B-5) that can be used to prevent accidental erasure of data. Since the DLT IV cartridge is a read-only cartridge when used in the SDLT drive, the write-protect switch in this configuration is not used. Figure B-5.
APPENDIX B: DLT IV Tape Cartridge B.4 Loading a Tape Cartridge Complete this subsection to load a tape cartridge into the front of the tape drive; refer to Figure B-6 as needed. 1. Insert the cartridge. Push the cartridge fully into the tape drive. NOTE: If you have loaded a DLT IV cartridge into a NonBackward Read Compatible (Non-BRC) tape drive, the drive ejects the cartridge. Figure B-6. Front Panel LEDs 2.
APPENDIX B: DLT IV Tape Cartridge Any command that attempts to write to the medium (Write, Write Filemarks, Erase) will return Check Condition status. The Sense Key will be set to Data Protect (7) and the ASC/ASCQ will be set to “Cannot Write Medium Incompatible Format” (30/05). No update of the tape will be performed. NOTE: For more details about specific SCSI commands and sense codes, refer to a separate document Super DLT SCSI Interface Guide, P/N 432614 rev. 01 or later. B.
APPENDIX B: DLT IV Tape Cartridge
Glossary A AC Alternating Current. Access (v.) To read, write, or update information on a storage medium, such as tape. (n.) The operation of reading, writing, or updating stored information. Access Time The interval between the time a request for data is made by the system and the time the data is available from the drive. Advanced PRML Advanced Partial Response Maximum Likelihood.
Glossary B Backup A copy of a file, directory, or volume on a separate storage device from the original, for the purpose of retrieval in case the original is accidentally erased, damaged, or destroyed. Bad Data Block A block that cannot reliably hold data because of a media flaw or damaged format markings. Base Plate An aluminum die casting that acts as the support platform for the other modules and for the drive enclosure.
Glossary C Cache Specialized RAM used as a buffer between a fast CPU or I/O channel and storage which has a relatively slow access time (e.g., tape or diskette), to avoid slowing down the former. Cartridge Receiver At tape insertion, the cartridge receiver assembly is responsible for guiding the tape into its operating position, opening the door, unlocking the cartridge brakes, and securing the tape for operation.
Glossary D Data Compression A process that reduces the amount of storage space required to hold a particular block of data. Data transfer speed and total tape capacity are affected by the data compression achieved. In accordance with industry practice, a typical compression ratio is 2:1 of data storage. Actual compression ratios achieved depend on the redundancy of data files being written. DC Direct Current. DCM Data Control Module.
Glossary E EEPROM Electronically-Erasable Programmable Read-Only Memory. An integrated circuit memory chip that can store programs and data in a non-volatile state. These devices, which are used to store firmware in DLT and SDLT drives, can be erased and reprogrammed with new data. EIM Electronic Interface Module. The SDLT EIM consists of two major boards – the Integrated Controller Module (ICM) board and a separate Host Interface Module (HIM) board. Encoding (n.
Glossary G GB Gigabyte. A unit of measure equal to 1000 Megabytes (MB) or 1,073,741,824 bytes. GSLink Global Storage Link. This SDLT feature allows you to quickly diagnose the integrity of the drive using an infrared (wireless) communication connector located on the front panel of the tape drive. Head The tiny electromagnetic coil and metal pole used to create and read back the magnetic patterns on the tape. Also known as the read/write head.
Glossary I ICM Integrated Controller Module. This board is one of two boards that make up the EIM. The ICM contains the main controller and servo micro-processor, the custom-designed SDLT ASICs, and the cache memory. IEC International Electrotechnical Commission, an international standards organization for electronics and electrotechnical matters. IEEE Institute of Electrical and Electronics Engineers.
Glossary M MB Megabyte. A unit of measure equal to 1 million bytes. Metal Particle A magnetic recording media in which a flexible base is coated (MP) Tape with a mixture of magnetic particles and a bonding agent. MRC Heads Magneto Resistive Cluster Heads. A cluster of small, costeffective Magneto Resistive (MR) tape heads packed densely together. MSB Most Significant Bit. MSE Multimode Single-Ended.
Glossary Q QEZ An ASIC (Application Specific Integrated Circuit) for the SDLT. Restore To replace data on the hard drive with data obtained from another media device. SAN Storage Area Network. SCSI Small Computer System Interface. An American National Standards Institute (ANSI) standard for the interface between a computer and peripheral controllers. SDLT Super DLTtape. The next-generation DLTtape family of products.
Glossary T Take-up Reel The reel inside every DLTtape drive onto which DLTtape media is wound. The in-the-drive take-up reel enables DLTtape systems to operate using a single-reel cartridge and thereby pack more tape and data into every cartridge. TapeAlert A firmware feature that monitors and returns the results of the tape drive’s on-going self-diagnosis activity. Tape Path The path through which tape moves from the cartridge, past the read/write head, and onto the take-up reel.
Glossary U UL Underwriters Laboratory; a United States safety organization. Unformatted Capacity The total number of usable byes on the media, including the space that will be required later to record location, boundary definitions, and timing information. (See also Native Capacity.) XEZ An ASIC (Application Specific Integrated Circuit) for the SDLT.
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