DataDirect Networks EF2800, User Manual

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
M a n a g i n g S p a r e s
F.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 section
F.3 on page 280 .
F.1.1 Adding a Dedicated Spare
You assign dedicated spare drives to a specific array. If a member drive
in the array fails, the EF2800 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
section
D.1 , "Creating Arrays" on page 205 .
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>
.
The list of drives screen
displays listing the available drives.