RS-1600-X24 User Guide
168
E.1 Managing Dedicated Spares
Dedicated spares are unused disk drives that you assign as a spare to a specific array. The disk must be
as large as the smallest member of the array. You cannot use a dedicated spare drive as a member of
an array or as a pool spare.
Although using a dedicated spare is the most secure way to provide spares for your arrays, it is also
expensive to keep an idle drive assigned to each array. An alternative method is to assign one or more
idle drives to the spare pool. See
E.3, ”Managing the Spare Pool”, on page 170
.
E.1.1 Adding a Dedicated Spare
You assign dedicated spare drives to a specific array. If a member drive in the array fails, the X24
Subsystem uses a dedicated spare drive to automatically reconstruct the array. You can add dedicated
spare drives to mirrored (RAID 1 and RAID 10) and parity (RAID 3, RAID 4, RAID 5, and RAID 50) arrays
when you create the array or afterward. You can assign up to four dedicated spare drives to an array. For
more information about assigning spares when you create an array, see
C.1, ”Creating Arrays”, on
page 105
.
Note
You cannot add a spare that does not have enough capacity to replace the smallest member in the array.
To add a dedicated spare:
1
From the System Menu, select
Array Menu
and press
Enter
.
The Select Array screen displays with a list of existing arrays.
2
Select the array you want and press
Enter
.
The array menu displays.
3
Select
Add Spare
and press
Enter
T
The list of drives screen displays listing the available drives.
Note
If a drive was a member of an array and was removed from the array, you cannot use it as a spare until
you clear the drive’s metadata. For more information, see
F.1.2, ”Clearing Metadata from a Drive”, on
page 177
.
To toggle the display between the drive model number, serial number, and the node and WWN, press
T
.
4
Select the drive you want to add as a spare and press
Enter
.
The system confirms the change.
5
Select
Yes
and press
Enter
.
E.1.2 Deleting a Dedicated Spare
You can delete a dedicated spare drive from an array at any time.
To delete a dedicated spare:
1
From the System Menu, select
Array Menu
and press
Enter
.
The Select Array screen displays with a list of existing arrays.
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