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Glossary-3
Glossary
consistency check command
The controller continuously performs a verification on a redundant
array to data integrity. In the case of RAID 1 or 10, consistency
checks assure that the data between like blocks match. In the case
of a RAID 5, consistency checks assure that data in the stripe and
the calculated parity for the stripe match.
container
See array.
D
dead partition
See failed.
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
A nonremovable platter in a hard drive, or removable media used
in a CD drive, floppy disk drive, or Zip drive. See also disk ID,
drive, and hard disk, hard drive.
disk ID
Unique disk identifier that consists of the channel number, ID, and
LUN (channel:ID:LUN), for example, 1:04:0. See also channel.
drive
Device used for storing data. May contain one or more removable
or nonremovable, writable or read only media. See also hard disk,
hard drive.