AMCC 720-0138-00 Manual Do Utilizador

Changing An Existing Configuration

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).

1

In 3DM 2, choose 

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 

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 

.

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.