Adaptec 2110S User Guide - Page 88
Managing Spares, Understanding How Spares and Failover Work
UPC - 760884138830
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7 Managing Spares In This Chapter ➤ Understanding How Spares and Failover Work 7-1 ➤ Managing the Spare Pool 7-2 ➤ Viewing Spare Assignments and Status 7-4 ➤ Spare Management Guidelines 7-4 Understanding How Spares and Failover Work Storage Manager Pro allows you to assign spare disk drives to a spare pool. If the controller detects an unrecoverable error during I/O, it checks for an available spare drive that has sufficient free space to handle the failover. Failover is the process by which the controller rebuilds data on a spare drive when a drive that is part of an array fails. Note: Spares only work with redundant array types: mirror set (RAID 1), RAID 5 set, stripe set of mirror sets (RAID 0/ 1), or stripe set of RAID 5 sets (RAID 0/5). The spare drive capacity must be equal to or larger than the failed drive. The controller checks for spares available in the spare pool. If the controller cannot find a suitable spare, and Storage Manager Pro is running on the system, Storage Manager Pro displays a message that says the controller was unable to find a suitable spare for failover. 7-1