Compaq Infortrend Manuale Utente

from the original members to larger drives, and then the smaller
drives can be replaced without powering down the system.
 

 

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).

A drive used for adding the capacity should have the same
capacity as that of the array’s members.

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.

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Expansion on RAID0 is not recommended, because the RAID0 array has
no redundancy.  Interruptions during the expansion process may cause
unrecoverable data loss.

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.