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MS-9246 1U Rackmount Server
b u s
See channel.
C
cache
Fast-access memory on the controller that serves as intermediate storage for data
that is read from, or written to, drives.
capacity
Total usable space available in megabytes or gigabytes.
channel
Any path, or bus, used for the transfer of data and the control of information be-
tween storage devices and a RAID controller. For Serial ATA channels, each channel
has a single drive capacity.
chunk
See stripe.
clear
Foreground initialization of a fault-tolerant array. A clear operation zeros all blocks of
the array. The array is not accessible until the clear task is complete.
concatenation
Joining of physical or logical drives in sequential order.
consistency check command
Command that reads all the blocks of a RAID 1 to determine if the blocks are consistent.
Any inconsistent blocks are fixed.
D
dead partition
See failed.
dedicated hot spare
Component that can take the place of a failed component only on the fault-tolerant
array to which it is explicitly assigned.
degr aded
A redundant (for example, a RAID 1) array in which one or more members have failed.
The data is intact but redundancy has been compromised. Any further failure would
cause the array to fail and result in data loss.
B-24
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