7914Admin_Physical.fm Draft Document for Review March 28, 2011 12:24 pm
272 IBM System Storage DS3500: Introduction and Implementation Guide
Figure 10-10 Assigning hot spare
Here you can select new hot spare for your unprotected Array.
Hot spare drives pane shows hot spare drives used. If you have more hot spare drives
then you need, you can select hot spare drive here, and if button Unassign in bottom part
of the window is highlighted, then you can unassign it. The Unassign button remains
greyed if you can lose protection by unassigning this hot spare disk. If you still need to
unassign this hot spare drive, do it manually as described above, in section “Manual
assignment and unassignment” on page 270.
Details pane: shows logical objects which belongs to selected Array or hot spare in panes
above.
Make sure to use this window to check that all your Arrays are protected. If they are not
protected, we recommend to implement complete hot spare protection for all Arrays as
soon as possible.
10.4 Failed disk drive replacement
You can replace a failed or missing disk drive that is used by an Array. Logical Drives are in
“Degraded” status, if parity for the failed disk is still calculated to hot spare drive (see the
example of the Recovery Guru window in Figure 10-11 on page 273).
You can assign a working unassigned disk drive, which is already inserted in the DS3500
Storage Subsystem, as a replacement drive. Also, the hot spare in use can be used as
replacement drive, but after parity recalculation is done.
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