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3.
Replace failed disks.
4.
After the failed disks are replaced, if fault tolerance is compromised, power the disk enclosure
off and back on again.
5.
If you were not able to recover your data using the power-cycling procedure, you must restore
your data from backup media.
Run the sautil <device_file> accept_media_xchg <logical_drive_number>
command on the affected logical drive. This restores the logical drive's configuration.
6.
Restore your data from backup media.
See
"The sautil <device_file> accept_media_xchg <logical_drive_number> command"
(page
77).
To minimize the risk of data loss due to compromised fault tolerance, make frequent backups of
all logical volumes.
Physical disk replacement
If you insert a hot-pluggable disk into a drive bay while the system power is on, disk activity in the
array pauses for a second or two while the new drive is spinning up. When the disk has achieved
its normal spin rate, data recovery to the replacement disk begins (as indicated by the flashing
Online/Activity LED on the replacement drive) if the array is in a fault-tolerant configuration.
If you replace a disk belonging to a fault-tolerant configuration while the system power is off, a
POST message appears when the system is powered on. This message prompts you to press F1
to start automatic data recovery. If you do not enable automatic data recovery, the logical volume
remains in a ready-to-recover condition and the same POST message appears each time the system
is restarted.
Factors to consider before replacing physical disks
Before replacing a degraded disk:
Confirm that the array has a current, valid backup.
Confirm that the replacement disk is of the same type (SAS or SATA) as the degraded disk.
Use replacement disks that have a capacity at least as great as that of the smallest disk in the
array. The controller immediately fails disks that have insufficient capacity.
CAUTION:
the system is power cycled, or (for a hot-pluggable disk) if a disk is removed and reinserted.
However, continued use of the disk can result in data loss. Replace the disk as soon as possible.
IMPORTANT:
be powered off and the last to be powered on. Taking this precaution ensures that the system does
not erroneously mark the drives as failed when the server is powered on.
A disk that was previously failed by the controller can seem to be operational after
In systems that use external data storage, be sure that the server is the first unit to
Physical disk replacement 105
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