AMCC 720-0138-00 Expanding Unit Capacity, Informing the Operating System of Changed Configuration

Changing An Existing Configuration

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

1In 3DM 2, choose Management > Maintenance.

2In the Unit Maintenance table on the Maintenace Page, select the unit you wish to expand by checking the box next to the Unit ID.

3Click the Migrate Unit button.

The Migrate dialog box appears, listing the drives which can be added to the unit.

4Select the drives(s) you wish to add to the unit by checking the Port ID box next to each one.

5If desired or necessary, select the appropriate RAID level.

6Click OK.

The Maintenance page updates to show the newly reconfigured unit. The Status column title indicates that Migration is in progress.

7Inform 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.

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