User’s Guide User’s Guide User’s Guide User’s Guide User’s Guide User’s Guide DAT 160 DAT 160 81-81794-01 A01
Quantum DAT 160 User’s Guide, P/N 81-81794-01 A01, March 2007. Made in USA. COPYRIGHT STATEMENT Copyright 2007 by Quantum Corporation. All rights reserved. Your right to copy this manual is limited by copyright law. Making copies or adaptations without prior written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of the law. © Copyright 2005-2007 Hewlett-Packard Development Company, L.P. This document was created by Hewlett-Packard Company (“HP”) for Quantum.
Contents Preface Chapter 1 xi Introduction 1 Product Overview.............................................................................................. 1 Capacity and Transfer Rates ..................................................................... 3 Tape Drive Components................................................................................... 3 LED Action Sequences ......................................................................................
Contents Decide Which Cable to Use ..................................................................... 14 Connecting the USB Cable to the Server ............................................... 15 Attach Power and USB Cables to the Tape Drive ....................................... 17 Attach Power and SCSI Cables ...................................................................... 18 Where Should the SCSI Terminator Be?................................................ 19 Checking SCSI Termination .......
Contents Chapter 5 Troubleshooting 43 General Procedure ........................................................................................... 43 Verifying USB Installation for Optimum Performance.............................. 45 Frequently Asked Questions About USB Drivers....................................... 48 Problems with Cartridges ............................................................................... 48 Appendix A Loading Revised Firmware 51 Firmware Upgrade Methods...........
Contents Quantum DAT 160 User’s Guide vi
Figures Quantum DAT 160 User’s Guide Figure 1 Drives Covered in This User’s Guide........................................ 2 Figure 2 Front Panel Components ............................................................ 4 Figure 3 For SCSI Drives Only — Internal Tape Drive Jumper Settings......................................................................................... 10 Figure 4 Removing Cover from Server...................................................
Figures Quantum DAT 160 User’s Guide Figure 18 Connecting the SCSI Cable ....................................................... 30 Figure 19 Two SCSI Termination Examples for the External Tape Drives ................................................................................. 32 Figure 20 Connecting the Power Cable .................................................... 33 Figure 21 Loading a Cartridge in an External Drive ..............................
Tables Quantum DAT 160 User’s Guide Table 1 Power Requirements.................................................................... 3 Table 2 LED Action Sequences ................................................................ 4 Table 3 SCSI Drives Only — Tape Drive Default Settings................... 9 Table 4 Supported SCSI Bus Types ....................................................... 27 Table 5 External Tape Drive Default Settings......................................
Tables Quantum DAT 160 User’s Guide x
Preface This document provides information to familiarize Quantum customers and systems professionals with DAT 160 tape drives. This chapter describes the purpose, scope, and audience of this document. It also lists the typographical conventions used in this document. This document describes how to install, configure, and care for the DAT 160 external and internal tape drives.
• Chapter 1, Introduction provide quick-start instructions for getting the drives up and running in the shortest possible time. • Chapter 2, Installing Internal Tape Drives describes how to install internal DAT 160 drive. • Chapter 3, Installing External Tape Drives describes how to install the external tape drives. • Chapter 4, Operating Your Tape Drive describes how to operate the drives. • Chapter 5, Troubleshooting describes troubleshooting procedures.
Refer to the appropriate product manuals for information about your tape drive and cartridges. SCSI-2 Specification 0 The SCSI-2 communications specification is the proposed American National Standard for information systems, dated March 9, 1990. Copies may be obtained from: Global Engineering Documents 15 Inverness Way, East Englewood, CO 80112 (800) 854-7179 or (303) 397-2740 Contacts Quantum company contacts are listed below.
0 Customer Support The Quantum Customer Support Department provides a 24-hour help desk that can be reached at: North/South America: (949) 725-2100 or (800) 284-5101 Asia/Pacific Rim: (International Code) + 61 7 3839 0988 Europe/Middle East/Africa: (International Code) + 44 (0) 1256 848748 Send faxes for the Customer Support Department to: North/South America: (949) 725-2176 Asia/Pacific Rim: (International Code) + 61 7 3839 0955 Europe/Middle East/Africa: (International Code) + 44 (0) 1256 848777
Chapter 1 1 Introduction This chapter provides quick-start instructions for getting the internal or external tape drives up and running in the shortest possible time. Topics in this chapter are: • Product Overview • Tape Drive Components Note: See chapter 2 for internal drive installation instructions or chapter 3 for external drive installation instructions. Product Overview 1 You have purchased the finest, most reliable DAT drive available.
Chapter 1 Introduction Product Overview Figure 1 Drives Covered in This User’s Guide Internal Drive Features External Drive The following list summarizes the key features of the DAT 160 drive. • LVD / Ultra Wide SCSI connection • 3.5-inch internal form-factor for installation in a 3.5-inch half-height space • 3.5-inch half-height drive factory-installed with 5.25-inch mounting rails and bezel for installation in a 5.
Chapter 1 Introduction Tape Drive Components The DAT 160 is ideal for workstation, server, and network/enterprise applications.
Chapter 1 Introduction LED Action Sequences Figure 2 Front Panel Components Clean LED (green) Tape Drive LED LED (green) (amber) Ready LED (green) Eject Button LED Action Sequences 1 Table 2 shows the different pattern sequences of the DAT 160 front-panel LEDs. Table 2 LED Action Sequences LED Sequence Cause Action required Drive may not have power, may be faulty, may have been power cycled or reset during a firmware upgrade, or there is no media present. Make sure the drive is switched on.
Chapter 1 Introduction LED Action Sequences LED Sequence Cause Action required The drive is ready for operation. None. This is normal. The drive is carrying out a normal activity (read, write). None. The drive requires cleaning. Load the cleaning cartridge. Ready is ON. Ready FLASHES. If the drive is upgrading firmware, do not reset or power cycle it. If the Clean LED is still flashing when you load a new or known good data cartridge after cleaning, call for service. Clean FLASHES.
Chapter 2 Installing Internal Tape Drives 2 This chapter describes how to install internal DAT 160 drive.
Chapter 2 Installing Internal Tape Drives Unpacking Your Drive Unpacking Your Drive Before you unpack the contents of your drive package, inspect the shipping containers for damage. If you spot damage to the container, notify your carrier immediately. When you unpack the package, compare the items received with those on the packing list. If any item is missing or damaged, please contact your place of purchase immediately. Note: Internal tape drives come in two mounting configurations, one for 3.
Chapter 2 Installing Internal Tape Drives Before You Begin Required Tools 2 The following is a list of the tools you will need. You may need additional items, depending on your installation requirements. • Phillips screwdriver • Flat blade screwdriver, if your computer uses flathead screws • TORX screwdriver, if your computer uses TORX screws Avoiding Electrostatic Damage 2 Your internal tape drive has very sensitive components that are prone to damage from electrostatic discharge (ESD).
Chapter 2 Installing Internal Tape Drives Installing Your Drive Installing Your Drive Review Drive Default SCSI Settings Your internal tape drive comes with various default settings. 2 • The jumpers are located on the back of the drive, between the SCSI interface and power connectors • If you change a SCSI setting, you must turn the power to the drive off and then on to have the new setting take effect. You may need to change these settings to suit your requirements.
Chapter 2 Installing Internal Tape Drives Installing Your Drive Figure 3 For SCSI Drives Only — Internal Tape Drive Jumper Settings 3 (Default) Pins: Function: 1-2 SCSI ID bit 0 3-4 SCSI ID bit 1 5-6 SCSI ID bit 2 7-8 SCSI ID bit 3 6 11 Default jumper settings shown (SCSI ID 3, parity checking enabled, and termination power disabled) 9-10 Parity checking 11-12 Termination Power Procedure 2 1 Determine whether you need to change the SCSI ID from the default of 3.
Chapter 2 Installing Internal Tape Drives Prepare Mounting Bay Prepare Mounting Bay Caution: To avoid personal injury or damage to the server or tape drive, ensure that the server is disconnected from the main power supply while you install the drive.
Chapter 2 Installing Internal Tape Drives Attach Mounting Hardware Attach Mounting Hardware If your server requires special rails or other hardware to install the tape drive, mount them on the tape drive now. If your server does not require special mounting hardware, proceed to Install Drive. Caution: Note: Static electricity can damage electronic components. Always wear an antistatic wrist strap if one is available.
Chapter 2 Installing Internal Tape Drives Install Drive 1 Use a Torx screwdriver to attach the appropriate screws. You may need to purchase the M3 screws separately. Position the screws (see figure 5). Figure 5 Attaching Mounting Screws 2 Attach the appropriate mounting hardware. Refer to the manufacturer’s documentation for instructions. • If you are installing on a server that requires a tray, place the tape drive in the tray.
Chapter 2 Installing Internal Tape Drives Attach USB Cable Figure 6 Installing the Tape Drive If your server does not use mounting hardware, check that the holes in the chassis are aligned with the holes in the side of the tape drive. Do not secure the drive at this point because you may have to move the drive to get the cables into place. Attach USB Cable Decide Which Cable to Use 2 Quantum DAT 160 User’s Guide There are several options for connecting the tape drive to your server: To an . . . Use .
Chapter 2 Installing Internal Tape Drives Attach USB Cable Checking to See Whether Your Server Has an Internal USB Port 2 Look at the diagram on the inside of the side panel of the server to establish whether the server has an internal USB port and its location. The internal USB port may have a 4-pin or a standard USB connector. Figure 7 Orientation of Internal 4-pin Connector (Older Style Pin Layout) Connecting the USB Cable to the Server To an Internal USB 2.
Chapter 2 Installing Internal Tape Drives Attach USB Cable Figure 8 Connecting to a 4-pin USB Port (Older Style Pin Layout) • If your server has a standard USB port, use a standard USB cable. You can use the supplied standard USB cable and cable ties to tidy excess cable length. 2 To an External USB 2.0 Port Purchase the special USB cable and Cable Routing Kit from Quantum.
Chapter 2 Installing Internal Tape Drives Attach Power and USB Cables to the Tape Drive Figure 9 Connecting the USB Cable Type B connector to tape drive Type A connector on inside of bracket Type A connector to server’s external USB port Attach Power and USB Cables to the Tape Drive Note: The drive is not powered from the USB bus. It must be connected to the server's power supply. 1 Attach the USB cable to the tape drive (Type B connector).
Chapter 2 Installing Internal Tape Drives Attach Power and SCSI Cables Figure 10 Attaching the Power Cable USB cable to server’s external USB Port Power cable Server’s power supply Tape drive USB cable to server’s external USB Port Power cable Attach Power and SCSI Cables To support the high performance of the tape drive it is important that you connect to a recommended SCSI bus and use a suitably-rated SCSI cable.
Chapter 2 Installing Internal Tape Drives Attach Power and SCSI Cables 4 If the drive is the last device on the SCSI chain, make sure that the SCSI cable is terminated correctly.
Chapter 2 Installing Internal Tape Drives Attach Power and SCSI Cables Therefore, assuming the HBA is the first device on the bus, you should check that the second terminator is placed after the last device (see figure 12). Checking SCSI Termination 2 The internal tape drive does not provide SCSI termination. Figure 12 shows two examples of terminating the internal tape drives. If the drive is the only SCSI device on the bus: 1 Attach it to the next-to-last connector on the SCSI chain.
Chapter 2 Installing Internal Tape Drives Secure the Drive Secure the Drive Note: The server latches and side views of your server model may not be exactly the same as shown in the illustrations. Please refer also to you server documentation. 2 No Mounting Hardware Used 1 Use M3 screws. Check that the holes in the chassis are aligned with the holes in the sides of the drive and use a regular Phillips screwdriver to secure the M3 screws (see figure 13).
Chapter 2 Installing Internal Tape Drives Completing Your Installation Completing Your Installation To complete and test your internal tape drive installation: 1 Use the screws you removed earlier to secure the drive in place. 2 Replace the computer cover. 3 Reconnect the power cord to the computer’s power connector. 4 Turn on the computer. 5 Install your backup software program. The documentation that came with your software should describe this procedure.
Chapter 2 Installing Internal Tape Drives Registering Your Tape Drive • If you have an Internet connection, please visit www.quantum.com/ registration to register your product. • If you do not have an Internet connection, complete the Registration Card included with your package and either mail or fax it to the address or fax number on the Card.
Chapter 3 3 Installing External Tape Drives This chapter describes how to install an external DAT 160 drive.
Chapter 3 Installing External Tape Drives Unpacking Your Drive Unpacking Your Drive Before you unpack the contents of your drive package, inspect the shipping containers for damage. If you spot damage to the container, notify your carrier immediately. When you unpack the package, compare the items received with those on the packing list. If any item is missing or damaged, please contact your place of purchase immediately.
Chapter 3 Installing External Tape Drives Connecting the SCSI Tape Drive Figure 16 Connecting Power and USB Cables On/off switch USB cable (pre-fitted) Power cable 3 Plug the USB cable into the USB connector on the server. Note: It is important to ensure that you connect your drive to a USB 2.0 port. The drive will work on a USB 1.1 port but performance will be severely degraded.
Chapter 3 Installing External Tape Drives Connecting the SCSI Tape Drive Why the SCSI Bus Type Important 3 The SCSI bus type determines the speed at which data can be transferred between devices on the bus and the maximum length of cable that can be used. The drives support a burst transfer rate of 160 MB/sec. To benefit from this level of performance, it is important to ensure that the drives are connected to a SCSI bus of a similar or higher specification.
Chapter 3 Installing External Tape Drives Connecting the SCSI Tape Drive • If you do not need to change these default settings, proceed to Checking SCSI Termination. Table 5 External Tape Drive Default Settings Parameter Default Setting SCSI ID 3 SCSI controller 7 Host operating system Microsoft 2000, 2003, XP Professional, and Linux Kernels 2.6 or higher Note: The drive can be assigned any unused ID between 0 and 15. Do not use SCSI ID 7, which is reserved for the SCSI controller.
Chapter 3 Installing External Tape Drives Connecting the SCSI Tape Drive Figure 17 Setting the SCSI ID 1 Determine whether you need to change the SCSI ID from the default of 3. 2 Change the tape drive’s SCSI ID, if necessary. Use a small screwdriver or a ball-point pen to press the indented SCSI ID selector buttons on the rear panel (see figure 17) until the required value is displayed. Do not use a pencil because small bits of graphite could contaminate the drive.
Chapter 3 Installing External Tape Drives Connecting the SCSI Tape Drive instead of the supplied cable. Refer to our web site for recommended products: www.quantum.com/support. Caution: To avoid damaging the computer or tape drive, ensure that both are powered off while you attach the SCSI cable. 1 Make sure you are connecting to a recommended SCSI bus type. Do not connect the tape drive to the same bus as a RAID controller.
Chapter 3 Installing External Tape Drives Checking SCSI Termination Why Does the Tape Drive Need a Terminator? 3 Terminators are essential, as they provide the correct voltages on the SCSI bus and prevent unwanted signal reflections from interfering with data transfers. The rule is: There must be termination at both physical ends of the bus and only at the ends. Normally the HBA forms one end of the SCSI bus and provides termination.
Chapter 3 Installing External Tape Drives Connect the Power Cable Figure 19 Two SCSI Termination Examples for the External Tape Drives External SCSI device SCSI Terminators External Tape Drive External SCSI device External Tape Drive SCSI Controller (termination disabled) SCSI Controller (termination enabled) Example 1: SCSI termination in a system that has only external SCSI devices.
Chapter 3 Installing External Tape Drives Completing Your Installation Figure 20 Connecting the Power Cable Power Cable Completing Your Installation To complete and test your external tape drive installation: 1 Reconnect the power cord to the computer’s power connector. 2 Use the On/Off Switch on the back of the external tape drive to turn on the drive (see figure 20). The Ready LED should be ON, the other three front-panel LEDs should be OFF. 3 Turn on the computer.
Chapter 3 Installing External Tape Drives Registering Your Tape Drive 6 Use your backup software application to perform a sample backupand-verify operation. The green Ready LED flashes as data is written to and/or read from the tape. 7 At the end of the operation, press the Eject button on the front of the external tape drive to eject the cartridge from the drive. If you encountered any problems during this procedure, see chapter 5 for troubleshooting procedures.
Chapter 4 Operating Your Tape Drive 4 This chapter describes how to operate your tape drive. Topics in this chapter are: • Using the Appropriate Media • WORM Cartridges • Loading a Cartridge • Initializing a Blank Cartridge • Unloading a Cartridge • Write-Protecting a DAT Cartridge • Cleaning the Tape Heads Using the Appropriate Media 4 The Quantum DAT 160 drive uses data-grade cartridges, which comply with ANSI specifications listed in the “3.
Chapter 4 Operating Your Tape Drive WORM Cartridges Table 6 Matching Drives with the Media They Support Media Tape Length DAT 160 155 meters DAT 72 170 meters DDS-4 150 meters Quantum recommends using Quantum DAT 160 cartridges: • DAT 160 media cartridge part number: MR-D6MQN-xx • DAT 160 cleaning cartridge part number: MR-D6CQN-xx WORM Cartridges 4 The Quantum DAT 160 tape drive includes support for both rewriteable and Write-Once, Read-Many (WORM) data cartridges.
Chapter 4 Operating Your Tape Drive Handling Cartridges Handling Cartridges 4 To protect your data cartridges and the information on them, observe the guidelines and avoid the pitfalls in table 7. Table 7 Cartridge Guidelines and Pitfalls Quantum DAT 160 User’s Guide Guidelines to Follow... Pitfalls to Avoid Use DAT cartridges at temperatures from 5° C (40° F) to 40° C (113° F). Cartridges can be stored at temperatures down to 40° C (-40° F).
Chapter 4 Operating Your Tape Drive Loading a Cartridge Loading a Cartridge 4 Quantum DAT drives have a front-loading cartridge bay for easy operation. To load a cartridge: 1 Hold the cartridge so the label is facing up and the exposed media is facing the drive. 2 Gently insert the cartridge into the drive (see figure 21). The drivebay door opens automatically when a cartridge is inserted.
Chapter 4 Operating Your Tape Drive Unloading a Cartridge Unloading a Cartridge 4 To unload a cartridge: 1 Be sure the Drive LED is OFF. Caution: To ensure integrity of your backups and restores, do not press the Eject button when the Drive LED is ON. 2 Press the Eject button on the front panel of the drive to unload the cartridge (see figure 22). The drive automatically flushes the drive buffer to tape, rewinds the cartridge, updates the system log, and ejects the cartridge.
Chapter 4 Operating Your Tape Drive Write-Protecting a DAT Cartridge Write-Protecting a DAT Cartridge 4 Write-protecting a DAT cartridge protects the data on the cartridge from being changed, overwritten, or deleted. To write-protect a cartridge, slide the write-protect tab on the front of the cartridge to the open position (see figure 23). To write-enable the cartridge, slide the write-protect tab so the hole is closed (see figure 23).
Chapter 4 Operating Your Tape Drive Cleaning the Tape Heads Cleaning the Tape Heads 4 If excessive dust or debris collects at the tape heads, your drive may not be able to read from or write to tape. To avoid this situation, clean the drive’s tape heads: • After every 50 hours of operation • If the Clean LED goes ON To clean tape heads, use a Quantum-qualified DAT 160 cleaning cartridge. Quantum offers a cleaning cartridge, Model MR-D6CQN-xx, that can be ordered from www.quantum.com.
Chapter 4 Operating Your Tape Drive Cleaning the Tape Heads • If the cleaning cartridge is not ejected, it has probably expired. In this case, press the Eject button, discard the cleaning cartridge and repeat the operation with a new cleaning cartridge. • The DAT 160 drives have a TapeAlert feature that notifies your backup software application when the tape heads need to be cleaned or when a cleaning cartridge needs replacement.
Chapter 5 5 Troubleshooting This chapter provides troubleshooting information. General Procedure 5 If a problem occurs, the first step is to try to establish whether the problem lies with the cartridge, the drive, the host computer and connections, or the way the system is being operated. 5 Has the System Just Been Installed? There could be an installation problem: 1 Check through the information in the relevant installation chapter of this guide.
Chapter 5 Troubleshooting General Procedure 5 Check the environmental conditions against the specified limits. 6 Are appropriate drivers and application software installed on the host? Are You Using New Cartridges or a Different Brand of Cartridge? Have You Been Using the Particular Cartridge for a Very Long Time? 5 The problem could lie with the cartridge: 1 Check through Operating Your Tape Drive on page 35. 2 Check that you are using a DDS-4, DAT 72, or DAT 160 cartridge.
Chapter 5 Troubleshooting Verifying USB Installation for Optimum Performance 3 If the problem persists, check the environmental conditions against the specified limits (see www.quantum.com). Perhaps move the drive to a more suitable site. Has a New Operating System Been Installed in the Host Computer? 5 Has New Backup Software Been Installed? The problem could lie with the host or the software. Consult the computer’s operating manuals, the software manual, or seek help from a service engineer.
Chapter 5 Troubleshooting Verifying USB Installation for Optimum Performance Ensure That the Tape Drive is the Only Device on a USB Hub (Windows) 5 On some computers multiple physical USB 2.0 ports will be connected to the same master port, known as a “root hub”. Connecting multiple devices to one root hub may degrade tape drive performance degradation.
Chapter 5 Troubleshooting Verifying USB Installation for Optimum Performance Figure 24 Windows Device Manager, USB Controllers Check Drivers (Linux) 5 Use the following procedure to check that both drivers are present: 1 usb_storage driver • At the command prompt type: lsmod | grep usb_storage • The output of this command should contain a line similar to: usb_storage 61193 0 • If this line is not present, type: modprobe usb_storage at the command line to load the usb-storage driver.
Chapter 5 Troubleshooting Frequently Asked Questions About USB Drivers • The output of this command should contain a line similar to: st 35933 0 • If this line is not present, type: modprobe st at the command line to load the st driver. Frequently Asked Questions About USB Drivers 5 I installed my Quantum USB tape drive then powered on my server. Windows didn’t run the Found New Hardware wizard and the drive appears to work OK.
Chapter 5 Troubleshooting Problems with Cartridges • The cartridge case is intact and that it contains no splits, cracks or damage. • The cartridge has been stored at the correct temperature and humidity. This prevents condensation. See the insert included with the tape cartridge for storage conditions. • The write-protect switch is fully operational. It should move from side to side with a positive click. • The World Wide Web site for more detailed troubleshooting information: www.quantum.
Chapter 5 Troubleshooting Problems with Cartridges The Drive Will Not Accept the Cartridge (or Ejects It Immediately) 5 The cartridge may have been damaged, for example dropped, or the drive may have a fault. If it is a cleaning cartridge, it has probably expired and should be discarded immediately. For data cartridges: 1 Check that the drive has power (the power cable is properly connected and the Tape LED is on).
Appendix A Loading Revised Firmware A Your DAT 160 tape drive includes permanently installed, electrically upgradeable flash memory. This memory allows qualified OEMs to revise DAT 160 firmware quickly and easily. It also prolongs the life of the tape drive by allowing the drive to inherit leading technologies as soon as those technologies become available. This appendix describes how to load firmware onto your tape drive.
Appendix A Loading Revised Firmware Using Firmware Cartridges Using Firmware Cartridges 1 The following procedure describes how to upgrade the tape drive firmware using a firmware upgrade tape cartridge. Firmware upgrade cartridges are available only to qualified Quantum OEM customers. Contact your sales representative for information. Note: The firmware can also be upgraded from a host computer via the SCSI connection using software available at www.quantum.com.
Appendix B B SCSI Configuration Guide SCSI in Quantum DAT Devices 2 Quantum DAT tape drives are Ultra160 SCSI-2 compatible devices. They are designed to operate on a low voltage differential (LVD) SCSI interface. They are not compatible with high voltage differential (HVD) SCSI devices. The drives support a burst transfer rate of 160 MB/sec. To benefit from this level of performance, it is important to ensure that the drives are connected to a SCSI bus of a similar or higher specification.
Appendix B SCSI Configuration Guide SCSI Terminology performance to your tape drive. Using Single Ended 8-Bit SCSI devices on the same bus is not recommended, as performance will be severely impacted and complicated bus configuration is required to overcome bus termination issues. Make sure that the last device on the SCSI bus is terminated. We recommend that you do not attach the tape drive to the same SCSI bus as the disk drive.
Appendix B SCSI Configuration Guide Setting Up the SCSI Bus Setting Up the SCSI Bus 2 Each device on a SCSI bus, including the SCSI host bus adapter (HBA), must be configured with a unique ID (identifier). The SCSI bus must be terminated. Note: SCSI ID Numbers Quantum recommends that a dedicated host bus adapter is used for the tape drive. A suitable adapter is available from Quantum as an accessory (seehttp:www.quantum.com/ ServiceandSupport/Index.aspx).
Appendix B SCSI Configuration Guide Identifying SCSI IDs Identifying SCSI IDs 2 If your computer already has devices connected to the SCSI bus, you will need to know their IDs to avoid any conflict with the new tape drive. Here are some methods of finding out the information: • Most computers display a list of SCSI devices and IDs during the boot-up process. This usually scrolls past very fast. If you press the [Pause] key, you should be able to halt the scrolling and view the list.
Appendix B SCSI Configuration Guide SCSI Termination • On external Quantum drives, the ID is displayed on the rear panel and can be set by pressing the little buttons above and below the number (using a ball point pen) (see Check the Drive’s SCSI ID on page 28). • On removable Quantum drives, the ID is set on the back of the tape array (see Check the Drive’s SCSI ID on page 28).
Appendix B SCSI Configuration Guide SCSI Termination Figure 25 SCSI Termination in Internal Drives As long as this terminator is attached, you do not need to take any further action. However, if you have other devices attached to the cable, make sure that they have termination removed or disabled. Note: External Drives If you have an internal and external device attached to the same SCSI bus, the HBA will be in the middle of the cable and thus its termination must be disabled.
Appendix B SCSI Configuration Guide SCSI Termination Figure 26 SCSI Termination in External Drives If you have more than one device on the SCSI bus, daisy-chain them by connecting a cable from the SCSI-OUT connector on the first device to the SCSI-IN connector on the second device and make sure that the second device is terminated. (Always use an LVD-rated cable and an LVD-rated or multimode terminator.
Appendix B SCSI Configuration Guide SCSI Cables Removable Drives 2 For Quantum DAT removable tape drives, termination is provided by connecting a terminator to the spare SCSI connector on the rear of the tape array. There are two connectors for each bay in the tape array. It doesn't matter which is used for SCSI-IN and SCSI-OUT. If you have each removable drive in the tape array attached to a separate bus, then, for each bay in use, you must attach a terminator to the spare connector for each device.
Appendix B SCSI Configuration Guide SCSI Cables Cable Quality 2 • It is important to use good quality cables. Generally speaking, cable quality affects performance and reliability. This is particularly true for external, shielded cables. • Look after your SCSI cables. In particular, take care when connecting or disconnecting not to damage the high-density connectors. Avoid putting excessive twists in external shielded cables, as this can cause premature failure.
Appendix B SCSI Configuration Guide SCSI Cables • With single-ended (SE) SCSI, each signal travels over a single wire and each signal's value is determined by comparing the signal to a paired ground wire. Signal quality tends to decrease over longer cable lengths or at increased signal speed. • With low voltage differential (LVD) signaling, signals travel along two wires and the difference in voltage between the wire pairs determines the signal value.
Appendix C USB Configuration Guide C USB in Quantum DAT Devices 3 The Quantum DAT tape drive is a USB 2.0 logo certified device. It supports the high-speed USB transfer rate with a theoretical maximum transfer of over 50 MB/s. (The actual backup rate will be less. This is defined by the transfer rate of the tape drive and the compressibility of the data.) To benefit from the high-speed performance of the USB 2.
Appendix C USB Configuration Guide USB Terminology host to a particular device is broadcast to all devices on the network. A device waits for a command addressed to itself and then responds as requested. The host determines how much of the overall USB network bandwidth a given device can use at any time. Any given USB network has only one host. Hubs act as command repeaters and multipliers. This allows many devices to be supported by one host.
Appendix C USB Configuration Guide Setting Up a USB Network implemented the USB interface, as defined by the USB specification. There are many types of USB logos depending on which features of the USB specification a device supports. A USB 2.0 logo-ed device correctly supports high, full, and low speed data transfer. Setting Up a USB Network 3 USB is very user friendly.
Appendix C USB Configuration Guide USB Cables USB Cables 3 USB cables are available in a variety of lengths. The maximum cable length is 5 meters. If you need to place a USB device further than 5 meters from the system, you must use a hub. Do not use USB cable extenders or couples. These are not recognized or approved by the USB organization. The USB specification does not allow their use and they are likely to reduce the reliability of the USB network or cause it not to work completely.
Index Cleaning tape heads 41 A Components on front panel 3 Appropriate cartridges 35 Avoiding electrostatic damage 8 F Firmware cartridges 52 Firmware upgrade 51 D Front panel components 3 Damage from static electricity 8 B DAT 1 backup software problems 45 default SCSI ID 28 Default settings external drives 27 H handling 37 internal drives 9 C I Capacity 3 Cartridges 37 appropriate 35 firmware 52 guidelines 37 initializing 38 loading 38 unloading 39 cartridges problems 44 Clean LED 41 Qua
Index jumper settings 10 cable length 60 SCSI termination 20 termination 57 tools 8 external drives 59 internal drives 58 terminology 54 unpacking 7 SCSI ID 56 default 28 J Transfer rates 3 U Unloading a cartridge 39 Unpacking external drives 25 SCSI termination Jumper settings for internal drives 10 external drives 31 internal drives 7 internal drives 20 Upgrading firmware 51 USB cables 66 L terminology 63 T LEDs Clean 41 Loading a cartridge 38 USB Network Tape cartridges handling 37 i
