Changing An Existing Configuration by Migratingwww.3ware.com 1314 Select any drives to be added to the unit.5 Select the new RAID level.6 Optionally, select a new Stripe size.7 Click OK.The Maintenance page updates to show the new unit and the Migrationprogress.8 Inform the operating system of the change, as described below under“Informing the Operating System of Changed Configuration”.Expanding Unit CapacityYou can expand a unit's capacity by adding one or more drives to it withoutchanging the RAID level, except for singles and RAID 1 units. (Since a singlecan only have one drive, and a RAID 1 can only have two drives, if you add adrive to either, the RAID level must be changed.)For example, for a RAID 5 with 3 drives, you can change the capacity byadding a forth drive.Expanding unit capacity can be accomplished while the unit is online, withoutexperiencing any data loss. This process is also referred to as Online CapacityExpansion (OCE).To expand a unit’s capacity1 In 3DM 2, choose Management > Maintenance.2 In the Unit Maintenance table on the Maintenance Page, select the unityou 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 tothe unit.4 Select the drives(s) you wish to add to the unit by checking the Port IDbox 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. TheStatus column title indicates that Migration is in progress.
