December 2002
Intermediate to advanced
260 pages
9h 18m
English
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Degraded Mode
When an array member fails for any reason, the array is said to have gone into degraded mode. This means that the array is not performing optimally and redundancy has been compromised. Degraded mode therefore applies only to arrays that have redundant capabilities. A RAID-0, for example, has only two states: operational and failed. This interim state, available to redundant arrays, allows the array to continue operating until an administrator can resolve the problem—usually by replacing a failed disk.
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