3Ware 9550SXU16MLB10 User Guide - Page 106

Configuring Units Table 6: Valid Migration Paths Destination Source Spare R0 R1 R5 R10 R50 Single JBOD Spare No No No No No No No No Changing RAID Level You can use migrate to change the RAID level of an existing unit while the unit is online, without experiencing any data loss. When you change a RAID level, you may also add one or more drives to the unit, and in some cases you can remove a drive. You can also migrate to change the unit's stripe size. For example, a four-drive RAID 5 with a 64KB stripe size can be migrated to a four-drive RAID 5 with 256KB stripe size. The steps below describe how to change a RAID level in 3DM2. If you want to migrate and reduce drives, you must use the 3ware 9000 Series Serial ATA RAID Controller CLI Guide Note: Once migration starts, the unit stays in the migrating state until the migration process is complete. The migration process cannot be aborted, and must be allowed to finish before a rebuild or verify to the unit is permitted. Warning: It is important that you allow migration to complete before adding or removing drives from the unit. Making physical changes to the unit during migration may cause the migration process to stop, and can jeopardize the safety of your data. To change the RAID level of a unit 1 In 3DM 2, choose Management > Maintenance. 2 In the Unit Maintenance table on the Maintenance Page, select the unit for which you wish to change the RAID level, by checking the box next to the Unit ID. 3 Click the Migrate Unit button. The Migrate dialog box appears. 4 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. 100 3ware 9000 Series Serial ATA RAID Controller User Guide