Array Behavior When A Disk Drive Fails; Removing Disk Drives - Dell EqualLogic PS4000 Hardware Maintenance

PS4000 Hardware Maintenance
• The GUI Member Disks window or the CLI
command shows a disk drive failure.

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 RAIDset containing the failed disk drive is degraded.
For example:
• If a spare disk drive is available, it replaces the failed disk drive. Performance
is normal after reconstruction completes.
• If a spare disk drive is not available and the failed disk drive is in a RAIDset
with no previous disk drive failure, the RAIDset can become degraded.
Performance may be impaired.
• If a spare disk drive is not available and the failed disk drive is in a RAIDset
that is already degraded, data may be lost and must be recovered from a
backup.
• If a disk drive fails, do not remove and re-install it in the array. It must be
replaced.

Removing Disk Drives

Caution: Wear electrostatic protection when handling a disk drive. See Using
an Electrostatic Wrist Strap on page 1-5.
Notes: Replace a failed disk drive as soon as possible to provide the highest
availability.
Do not remove a disk drive from a slot, unless you have another disk
drive or a blank carrier to replace it. Each slot must contain a disk drive or
blank carrier.
Do not remove a functioning disk drive from an array, unless the disk
drive is a spare; otherwise, a RAIDset may become degraded. If you
remove a spare, replace the disk drive as soon as possible.
Before completely removing a functioning disk drive from an array slot,
wait 30 seconds to allow the disk drive to stop spinning and the heads to
land.
Store replacement disk drives in the packaging in which they were
shipped.
Maintaining Disks
member select show disks
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