Moving a subdisk for redundant volumes (mirrored or RAID-5)
will use the redundant data to recreate the subdisk on the healthy
disk. However, for nonredundant volumes (concatenated or striped),
the data cannot be recreated and doing subdisk move will therefore
lose data, which could be recovered if the disk can be repaired.
Thus, when you attempt to move a subdisk from a failed or missing
disk that has nonredundant data, a dialog box comes up that asks
you if you want to force the move. You may want to force the move
if you don't need the data anymore or you can no longer recover
the data. By doing so, you will retain the volume structure but
there is no guarantee that the data will be recoverable.
Use the “Moving a Subdisk” feature
to move the part of a volume that is on a failed or missing disk
to a healthy one.
Disk
Phaseout |
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When a disk starts getting intermittent I/O errors and shows
signs of hardware fatigue, you can use the “Moving a Subdisk” feature to move all its subdisks to healthier
disks. The benefit of moving subdisks instead of copying the volumes
is that you need only enough space on the receiving disks for the subdisks
on the one failed disk, not for entire volumes that may span multiple
disks. Another advantage is that there is no interruption in I/O.
Moving subdisks provides you a flexible means of making adjustments
in your storage system while it is up and running.
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