IBM PC Server 330, Руководство пользователя

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Scenario 2 :
Ÿ Only one hard disk drive fails.
Ÿ A hot-spare drive is not defined or is smaller than the failed
drive.
Ÿ
The logical drives in the array are assigned RAID levels 0, 1,
and 5, or a combination of these three levels.
All data in logical drives assigned RAID level 0 will be lost. In this
array, the logical drives that are assigned RAID level 1 or 5 will be
in Critical (CRT) state. The logical drives assigned RAID level 0 will
be in the Offline (OFL) state.
Scenario 3 :
If more than one drive in an array fails, all the data is lost in all of
the logical drives of the array. For this reason, it is important that
you replace and rebuild a DDD drive as soon as possible.
Logical and Hard Disk Drive Status Indications
The status of the hard disk drive determines the status of the logical
drives in the array in which the hard disk is grouped.
Ÿ
A single hard disk drive failure, (indicated by a DDD state in
the Bay/Array selection list), generates a CRT state for the
array's logical drives that are assigned levels 1 and 5. Data in
logical drives with a CRT state is not lost, but you must replace
the failing hard disk drive promptly and perform a Rebuild
operation. If two hard disk drives fail, all of the data in the
array is lost.
After you install a new hard disk drive, the Rebuild process
changes the drive state from DDD to RBL, if the array contains a
CRT logical drive. After the Rebuild process completes, the
hard disk drive state changes from RBL to ONL.
Ÿ
A multiple hard disk drive failure causes logical drives in that
array to have an OFL state. This means that data is lost in all
the logical drives in that array, regardless of which RAID level
is assigned.
Chapter 2. Configuring Your Disk Arrays
57