3Ware 8006-2LP User Guide - Page 46

3ware Disk Array Configuration Utility Maintain Disk Array The array listed below can have its write cache state changed. Verify checks the data integrity of a fault tolerant array. Array Unit 2 - 2 drive Mirror Port 2 - QUANTUM FIREBALLP LM30 Port 3 - QUANTUM FIREBALLP LM30 30.0GB 30.0GB 30.0GB Array's Write Cache State: enabled Verify Array: no OK Cancel Alt-F1 Help Previous/Next Enter Change Value Esc Cancel Figure 17. Maintain Disk Array Display Note: Fault tolerant arrays can not be verified until after they are initialized. For RAID 1 and 10 arrays the initial verify can be done in the BIOS, in 3DM, or through the CLI. Rebuilding a mirrored disk array Escalade ATA RAID Controllers allow you to create fault tolerant disk arrays by selecting a mirrored RAID 1 or RAID 10 array. These disk arrays store identical data on two or more drives to protect against drive failure. If one or more of the drives of a mirrored array is removed, unplugged or fails on read or write requests, the array is marked as DEGRADED and the drive is marked as Not In Use or is not displayed if no longer available. (see Figure 18 and Figure 19). You can still read and write data from a degraded disk array, but the array will not be fault tolerant until it is rebuilt using the Rebuild feature, described in the 3ware Disk Array Configuration Utility or 3DM Disk Management Utility chapters, or until it is automatically rebuilt using a previously created hot spare. 38 3ware Escalade ATA RAID Controller User Guide