Chaparral K5312/K7313 - Manual (Page 52)

G- and K-Series User’s Guide
4-18
Expanding Array Capacity
You can expand array capacity without stopping I/O activity, so you can continue
using the array while the expansion process runs. You can only expand one array at a
time.
Note: Expanding an array here does not change the size of the host
operating system partitions that reside on the array, because our controller is
working at the block level not the file system level of the operating system.
To use the new space, you must create a new partition using the newly added
space or use a third party application specific to the operating system to
change the partition size.
How you create a new partition or resize an existing one depends upon the
operating system. Most operating systems cannot resize an existing partition.
Refer to your operating system documentation.
The number of drives you can add to an array depends upon the RAID level as shown
below. You also cannot exceed the maximum number of drives for each RAID level.
See Creating Arrays on page 4-1.
Note: Once you start expanding array capacity, you cannot stop it. The
expand function may take an hour or more to complete, depending on the
array type, array size, drive speed, and other processes running on the
controller.
Table 4-2. Drive additions by RAID level
RAID Level
Number of Drives You
Can Add
RAID 0 1 to 4
RAID 1 (mirrored) Cannot expand
Volume Set Cannot expand
RAID 10 2 or 4
RAID 3, 4, or 5 1 to 4
RAID 50 3 to 5