Dell EqualLogic PS Series Посібник користувача обладнання - Сторінка 17

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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.

If a drive fails, replace it. Do not reinstall it in the array. If a replacement drive is not available,

Note:

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.

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.

The drive LED is shown in

Figure

7. The drive LED states are described in

Table

Figure 7: LEDs on Drive Enclosure