Dell EqualLogic PS6610E EqualLogic PS6610 Storage Arrays Hardware Owners Manua - Page 17
Array, Behavior, Drive, Fails, Identifying, Failed, Drives, Interpreting
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PS6610 Hardware Owner's Manual 2 Drive Maintenance Array Behavior When a Drive Fails The PS6610 firmware uses a copy-to-spare operation to replace failing drives. This operation can, in many cases, improve the performance of the drive replacement process by avoiding a full RAID rebuild, which provides better reliability. Note: If a drive fails, replace it. Do not reinstall it in the array. If a replacement drive is not available, keep the failed drive in the array until it can be replaced. If a Spare Drive Is Not Available If a spare drive is not available, the RAID set will become degraded and performance might be impaired. However, a RAID 6 set can survive two simultaneous drive failures. If a spare drive is not available and the failed drive is in a RAID set that is already degraded, data might be lost and must be recovered from a backup. Identifying Failed Drives A drive failure is indicated by: • An LED located on the drive. See Interpreting Drive LEDs on page 11. • An LED on the Enclosure Status Indicator. • A message in the event log or in the Group Manager Alarms panel. • Indications in the Group Manager group member Disks tab or the CLI member select show disks command output. Inside each drawer, a Drawer Slot Label located on top of the sideplanes shows the drive numbering within each row. See Disk-Drive Slot Numbers on page 10. Interpreting Drive LEDs The drive LED is shown in Figure 7. The drive LED states are described in Table 7. Figure 7: LEDs on Drive Enclosure 11
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