AMCC 3WARE 720-0138-00 - Manual (Page 61)

Changing An Existing Configuration
www.3ware.com 53
Expanding Unit Capacity
You can expand a unit's capacity by adding one or more drives to it without
changing the RAID level, except for singles and RAID 1 units. (Since a single
can only have one drive, and a RAID 1 can only have two drives, if you add a
drive to either, the RAID level must be changed.)
For a RAID 5 with 3 drives, you can change the capacity by adding a forth
drive.
Expanding unit capacity can be accomplished while the unit is online, without
experiencing any data loss. This process is also referred to as Online Capacity
Expansion (OCE).
To expand a unit’s capacity
1 In 3DM 2, choose Management > Maintenance.
2 In the Unit Maintenance table on the Maintenace Page, select the unit you
wish to expand by checking the box next to the Unit ID.
3 Click the Migrate Unit button.
The Migrate dialog box appears, listing the drives which can be added to
the unit.
4 Select the drives(s) you wish to add to the unit by checking the Port ID
box next to each one.
5 If desired or necessary, select the appropriate RAID level.
6 Click OK .
The Maintenance page updates to show the newly reconfigured unit. The
Status column title indicates that Migration is in progress.
7 Inform the operating system of the change, as described below.
Informing the Operating System of Changed
Configuration
After you change the configuration of a unit, you must inform the operating
system of the change, and you may need to re-partition the unit.
Resizing the file system to match the new partition size is not automatic. It
may be necessary to expand the file-system using tools specific to your
operating system.
In addition, in order to use the new capacity, you need to either resize the
existing partition or add a new partition.