Compaq External RAID Controller & Subsystem Infortrend, Руководство по эксплуатации

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Infortrend
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from the original members to larger drives, and then the smaller
drives can be replaced without powering down the system.
Note on Expansion
1. Added Capacity:
When a new drive is added to an existing logical drive, the
capacity brought by the new drive appears as a new partition.
Assuming that you have 4 physical drives (each of the size of
36GB) in a logical drive, and that each drive’s miximum capacity
is used, you will have a logical drive of the size of 108GB. One
drive’s capacity is used for parity; e.g., RAID 3. A 36GB drive is
added, the capacity will be increased to 144GB in two separate
partitions (one is 108GB and the other 36GB).
2. Size of the New Drive:
A drive used for adding the capacity should have the same
capacity as that of the array’s members.
3. Applicable Arrays:
Expansion can only be performed on RAID 0, 3, and 5 logical
drives. Expansion can not be performed on a logical
configurations that do not have parity; e.g., NRAID or RAID 1.
NOTE:
• Expansion on RAID0 is not recommended, because the RAID0 array has
no redundancy. Interruptions during the expansion process may cause
unrecoverable data loss.
4. Interruption to the Process:
Expansion should not be canceled or interrupted once begun. A
manual restart should be conducted after the occurrence of
power failure or interruption of any kind.