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Glossary
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.
container
See array.
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.
degraded
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.
dirty data
Data that has been written to a
cache
but which has not been
"flushed" out to its final destination.
disk
Physical disk drive. Randomly accessible, re-writable data storage
device. Also called hard disk.
Glossary-3
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