DataDirect Networks EF2800, Руководство пользователя

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
C r e a t i n g a n d M a n a g i n g A r r a y s & P a r t i t i o n s
5.4.2 Managing Dedicated Spares
Dedicated spares are available disk drives that you assign as a spare to
a specific array. The disk drive 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 global spare.
Although using a dedicated spare is the most secure way to provide
spares for your arrays, it is also expensive to keep a spare drive
assigned to each array. An alternative method is to assign one or more
unused drives as global spares or to enable Dynamic Spares (see
Section
5.4.3 on page 85 and Section 5.4.1 on page 83 ).
5.4.2.1 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 redundant arrays (mirrored [RAID 1 and RAID 10] and parity
[RAID 3, RAID 4, RAID 5, and RAID 50]). You can assign up to four
dedicated spare drives to an array.
N
OTE
: A dedicated spare must have enough capacity to replace the
smallest member in the array.
To add a dedicated spare:
1. From SAM, select
Manage EF2800 > Disk Array Config > Add
Dedicated Spare
. The Add Dedicated Spare page displays listing
all available drives. 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 information about clearing
metadata, refer to Section
G.1.2 , "Clearing Metadata from a Drive"
on page 288 .
2. In the EF2800 Array Overview panel, select the array you want to
add a spare to.
3. In the Add Spares to Array panel, select the drive you want to add
as a spare.
4.
Click
Add Spares to This Array
.