PS6500 Hardware Maintenance Maintaining Disk Drives
2-3
If a disk drive fails, contact your PS Series support provider for a replacement.
Disk Drive Numbering
Disk drives are numbered from 0 to 47, starting from the left side of the array, going front to back. Disk drives 0 to
3 comprise the first column of disk drives, disk drives 4 to 7 comprise the second column of disk drives, and so on.
See Figure 2-4.
Figure 2-4: PS6500 Disk Drive Numbering
Array Behavior When a Disk Drive Fails
How an array handles a disk drive failure depends on whether a spare disk drive is available and whether the failed
drive was in a degraded RAID set.
• If a spare disk drive is available, it automatically replaces the failed disk. Performance is normal after
reconstruction completes.
• If a spare disk drive is not available and the failed disk drive is in a RAID set with no previous disk drive
failure, the RAID set becomes degraded. Performance may be impaired.
• If a spare disk drive is not available and the failed disk drive is in a RAID set that is already degraded, data may
be lost and must be recovered from a backup.
Replace a failed disk drive as soon as possible. Contact your PS Series support provider for a replacement.
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