Expanding Array Capacity - Adaptec DuraStor 7220SS User Manual

Expanding Array Capacity

You can expand array capacity without stopping I/O activity. You
can only expand one array at a time.
Note: Expanding an array does not change the size of host
OS partitions that reside on the array because the
controller is working at the block level, not the file system
level, of the OS. To use the new space, create a new
partition using the newly added space or use a third-party
application specific to the OS to change the partition size.
How you create a new partition or resize an existing one
depends upon the OS. Most OSs cannot resize an existing
partition. Refer to your OS's documentation.
The number of disk drives you can add to an array depends upon
the RAID level as shown in
maximum number of disk drives for each RAID level. See
Arrays on page
Table 2-2 Disk Drive Additions by RAID Level
RAID Level
RAID 0
RAID 1 (mirrored)
Volume Set
RAID 10
RAID 3, 4, or 5
RAID 50
If you are expanding a multiple-partition array, you add free space
at the end of the array. For more information about partitions, see
Understanding Partitions on page
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, disk
drive speed, and other processes running on the controller.
Creating and Managing Arrays and Partitions
Table
2-1.
Number of Disk Drives You Can Add
2-2. You also cannot exceed the
1 to 4
Cannot expand
Cannot expand
2 or 4
1 to 4
3 to 5
2-22.
Creating
2-16