Product specifications

Array Expansion
8-3
RAID levels supported: RAID 0, 1, 3, 5 and 6
Expansion can be performed on logical drives or logical volumes
under the following conditions:
1. There is unused capacity in a logical unit
2. Capacity is increased by using member drives of larger capacity
(see Copy and Replace in the discussion below)
Data is recalculated and distributed to drive members or members
of a logical volume. Upon the completion of the process, the added
or the previously unused capacity will become a new partition. The
new partition must be made available through host LUN mapping
in order for a host adapter to recognize its presence.
8.3 Mode 1 Expansion:
Adding Drives to a Logical Drive
Use drives with the same capacity as the original drive members.
Once completed, the added capacity will appear as another
partition (new partition). Data is automatically re-striped across the
new and old members during the add-drive process. See the
diagram below to get a clear idea:
Figure 8- 2: Expansion by Adding Drive