3Ware CBL-P-SATA Installation Guide - Page 25

3ware Escalade ATA RAID Controller Installation Guide 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 13 and Figure 14). 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. 3ware Disk Array Configuration Available Drives: Port 2 - QUANTUM FIREBALLP LM30 Port 3 - QUANTUM FIREBALLP LM30 Disk Arrays: Array Unit 0 - 2 drive Mirror Port 0 - QUANTUM FIREBALLP LM30 Port 1 - QUANTUM FIREBALLP LM30 30.0GB 30.0GB 30.0GB DEGRADED 30.0GB Not in Use 30.0GB Create Array Delete Array Maintain Array Rebuild Array Alt-F1 Help Previous/Next $ Toggle Hot Spare EnterSelect/Deselect F6 Restore Initial Values Esc Cancel F8 Done Figure 13. Degraded RAID 1 Array Drive When Not in Use 38 www.3ware.com 3ware Disk Array Configuration Utility 3ware Disk Array Configuration Available Drives: Disk Arrays: Array Unit 0 - 4 drive 64K RAID 10 Port 0 - QUANTUM FIREBALLP LM30 Port 1 - QUANTUM FIREBALLP LM30 Port 2 - QUANTUM FIREBALLP LM30 Port 3 - QUANTUM FIREBALLP LM30 60.0GB DEGRADED 30.0GB Not in Use 30.0GB 30.0GB 30.0GB Create Array Delete Array Maintain Array Rebuild Array Alt-F1 Help Previous/Next $ Toggle Hot Spare EnterSelect/Deselect F6 Restore Initial Values Esc Cancel F8 Done Figure 14. Degraded RAID 10 Array Drive When Not in Use Note: A RAID 10 array can be configured with either four, six, eight, ten or twelve drives. In a 4-drive configuration, up to two drives can be rebuilt. In a 6-drive configuration, up to three drives can be rebuilt. In an 8-drive configuration, up to four drives can be rebuilt. In a 12drive configuration, up to six drives can be rebuilt. Rebuilding a RAID 5 disk array Escalade ATA RAID Controllers allow you to create fault tolerant RAID 5 disk arrays. These disk arrays achieve fault tolerance by using a simple (exclusive OR) function to generate the parity data www.3ware.com 39