SC4020 Storage System Owner’s Manual July 2017 Rev.
Notes, Cautions, and Warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Copyright © 2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents About This Manual.......................................................................................................................... 5 Revision History..................................................................................................................................................................... 5 Audience.........................................................................................................................................................................
3 SC4020 Storage System Technical Specifications.........................................................................25 Technical Specifications.....................................................................................................................................................
Preface About This Manual This manual describes the features and technical specifications of an SC4020 storage system.
• Dell Storage Manager Administrator’s Guide • Provides instructions for using the Data Collector Manager and the Dell Storage Manager Client. Dell Storage Manager Release Notes • Provides information about Dell Storage Manager releases, including new features, enhancements, fixed issues, and open issues. Dell TechCenter Provides technical white papers, best practice guides, and frequently asked questions about Dell Storage products. Go to http:// en.community.dell.com/techcenter/storage/.
1 About the SC4020 Storage System The SC4020 storage system provides the central processing capabilities for the Storage Center Operating System and management of RAID storage. Topics: • • • • Storage Center Hardware Components Storage Center Architecture Options Storage Center Communication SC4020 Storage System Hardware Storage Center Hardware Components The Storage Center described in this document consists of an SC4020 storage system, enterprise-class switches, and expansion enclosures.
NOTE: An SC4020 storage system cannot be connected to both SC200/SC220 expansion enclosures and SC280 expansion enclosures at the same time. The SC4020 supports only a single chain of SC200/SC220 expansion enclosures or a single chain of SC280 expansion enclosures. Storage Center Architecture Options A Storage Center with an SC4020 storage system can be deployed in the following configurations: • An SC4020 storage system deployed without SC200/SC220 expansion enclosures. • Figure 1.
Figure 3. SC4020 Storage System with Two SC280 Expansion Enclosures Storage Center Communication A Storage Center uses multiple types of communication for both data transfer and administrative functions. Storage Center communication is classified into three types: front end, back end, and system administration. Front-End Connectivity Front-end connectivity provides I/O paths from servers to a storage system and replication paths from one Storage Center to another Storage Center.
Back-End Connectivity Back-end connectivity refers to the SAS cabling between the storage system and expansion enclosures. If expansion enclosures are not used, back-end connectivity refers to the SAS cabling between the storage controllers. An SC4020 storage system supports back-end connectivity to multiple expansion enclosures.
Item Name Icon Description • • • • • 3 Identification button Off – No power On steady blue – Power is on and firmware is running Blinking blue – Storage system is busy booting or updating On steady amber – Hardware detected fault Blinking amber – Software detected fault Lights when the storage system identification is enabled. • • Off – Normal status Blinking blue – Storage system identification enabled 4 Unit ID display — Displays the storage system identification number.
Item Name Icon Description • • 5 AC power fault indicator (2) • • • 6 AC power status indicator (2) • • • 7 DC power fault indicator (2) • • • Steady amber – Fan fault or the storage system is having a problem communicating with the PSU Blinking amber – PSU is in programming mode Off – Normal operation Steady Amber – PSU has been removed or the storage system is having a problem communicating with the PSU Blinking amber – PSU is in programming mode Off – AC power is off, the power is on but th
Item Control/Feature Icon Description 1 Battery status indicator • • • Blinking green (on 0.5 sec. / off 1.5 sec.) – Battery heartbeat Fast blinking green (on 0.5 sec. / off 0.5 sec.
Item Control/Feature Icon Description LEDs for the two 16 Gb Fibre Channel ports: • • • • • • • • All off – No power All on – Booting up Blinking amber – 4 Gbps activity Blinking green – 8 Gbps activity Blinking yellow – 16 Gbps activity Blinking amber and yellow – Beacon All blinking (simultaneous) – Firmware initialized All blinking (alternating) – Firmware fault 15 Mini-SAS port B (Slot 2/Port 2) Back-end expansion port B 16 Mini-SAS port A (Slot 2/Port 1) Back-end expansion port A SC4020 Stor
Item Control/Feature Icon 7 Recessed power off button Not currently used 8 Storage controller fault • • • 9 Recessed reset button Not currently used 10 Identification LED • • • 11 USB port One USB 3.0 connector NOTE: For engineering use only. 12 Diagnostic LEDs (8) 13 Serial port (3.
Item Control/Feature Icon Description 3 MGMT port (Slot 3/Port 1) — Ethernet/iSCSI port that is typically used for storage system management and access to the BMC NOTE: To use the MGMT port as an iSCSI port for replication to another Storage Center, a Flex Port license and replication license are required. To use the MGMT port as a front-end connection to host servers, a Flex Port license is required.
SC4020 Storage System Drives The SC4020 storage system supports only Dell Enterprise Plus hard disk drives (HDDs) and Dell Enterprise solid-state drives (eSSDs). Figure 10. SC4020 Storage System Drive Indicators Item Control/Feature Indicator Code 1 Drive activity indicator • • Blinking green – Drive activity Steady green – Drive is detected and has no faults 2 Drive status indicator • • • • Off – Normal operation Blinking amber (on 1 sec. / off 1 sec.
2 Replacing SC4020 Storage System Components This chapter describes how to remove and install components of the SC4020 storage system. This information assumes that you have received the replacement component and are ready to install it.
• • • • • Dell recommends that you always use a static mat and static strap while working on components in the interior of the storage system chassis. Observe all conventional ESD precautions when handling plug-in modules and components. Use a suitable ESD wrist or ankle strap. Avoid contact with backplane components and module connectors. Keep all components and printed circuit boards (PCBs) in their antistatic bags until ready for use.
CAUTION: Shutting down the storage system results in a system outage. 4. Click OK. After the storage system shuts down, unplug the power cables from the power supply/cooling fan modules. Replacing the Front Bezel The front bezel is a cover for the front panel of the storage system. About this task The front bezel must be removed from the front panel when replacing hard drives. Steps 1. 2. 3. 4. Use the system key to unlock the keylock at the left end of the bezel.
Identify the Failed Hard Drive To determine which hard drive failed, use the Dell Storage Manager Client. Steps 1. 2. 3. 4. Use the Dell Storage Manager Client to connect to the Storage Center. Click the Hardware tab. In the Hardware tab navigation pane, select the Storage Center. In the Hardware Alerts area, find the hardware alert that identifies the expansion enclosure with the failed hard drive. Figure 14. Hardware Alert Identifying the Expansion Enclosure with the Failed Hard Drive 5.
Replace a Hard Drive Use this procedure to replace a failed hard drive. Prerequisites Use SupportAssist to send diagnostic data to Dell Technical Support. About this task Hard drives can be replaced one at a time without shutting down the storage system. CAUTION: To prevent a storage system reset, at least one powered drive must remain installed in the primary chassis when multiple drives are replaced. Steps 1. Remove the front bezel. A solid amber LED is lit on the failed hard drive. 2.
Replacing Rack Rails Rack rails are used to install the SC4020 storage system into a rack. Prerequisites 1. Use SupportAssist to send diagnostic data to Dell Technical Support. 2. Shut down the storage system using the Dell Storage Manager Client. About this task Use this procedure to replace rack rails. NOTE: Replacing rack rails must be performed during a scheduled maintenance window when the Storage Center system is unavailable to the network. Steps 1. 2. 3. 4. 5. 6. 7. 8. 9.
3. Select Storage Center Configuration and Detailed Logs. 4. Click OK. 5. Change the Storage Center mode from maintenance mode to normal operation. Contact Dell Technical Support Contact Dell Technical Support to inform them that you completed a repair. Request that Dell Technical Support re-enable alerts for the storage system and ask for a post-installation system check.
3 SC4020 Storage System Technical Specifications Technical Specifications The technical specifications of the SC4020 storage system are displayed in the following tables. Table 1. Hard Drives Drives SAS hard drives Up to 24 2.5-inch SAS hot-swappable hard drives (6.0 Gbps) Table 2.
Table 5. Back Panel Ports(continued) Back-Panel Ports Connectors (per Storage Controllers) Serial connector Used for initial configuration and support only functions Table 6. LEDs LED Indicators Front panel • • • • One two-color LED indicator for system status. One single-color LED indicator for power status.
Table 10. Environmental Environmental For additional information about environmental measurements for specific storage system configurations, see dell.com/ environmental_datasheets. Temperature Operating 10°C to 35°C (40°F to 95°F) with a maximum temperature gradation of 20°C per hour Storage –40° to 65°C (–40° to 149°F) at a maximum altitude of 12,000 m (39,370 ft) Relative humidity Operating 10% to 80% (noncondensing) with 29°C (84.
