Changing An Existing Configurationwww.3ware.com 145Figure 63. RAID Level Migration ExampleTypically, a unit is reconfigured with the same or more storage capacity.Sometimes additional drives are added. The following table shows validreconfigurations, some of which will require the addition of more drives.Changing RAID LevelYou can use migrate to change the RAID level of an existing unit while theunit is online, without experiencing any data loss. When you change a RAIDlevel, you may also add one or more drives to the unit. You can also migrate tochange the unit's stripe size. For example, a four-drive RAID 5 with a 64KBstripe 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.Table 8: Valid Migration PathsSourceDestinationR0 R1 R5 R10 R50 Single JBOD SpareR0 Yes No Yes Yes Yes No No NoR1 Yes No Yes Yes Yes Yes No NoR5 Yes No Yes Yes Yes No No NoR10 Yes No Yes Yes Yes No No NoR50 Yes No Yes Yes Yes No No NoSingle Yes Yes Yes Yes Yes No No NoJBOD No No No No No No No NoSpare No No No No No No No No
