Adaptec 2020SA User Guide - Page 75
Controller Configuration Options, Adaptec RAID Configuration Utility ARC - rebuilding array
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Adaptec RAID Configuration Utility (ARC) Controller Configuration Options The Controller Configuration options are described in the table below. Option Drives Write Cache Runtime BIOS Automatic Failover Array Background Consistency Check BBS Support Default Drive's Default Enabled Enabled Disabled Enabled Models Affected All All All All See note 1 Description When Enabled, write cache is enabled, providing maximum drive performance. When Disabled, no write cache is used on the drive. By default, the drive's setting is used. Caution-When Enabled, there is a slight possibility (less than with controller cache) of data loss or corruption during a power failure. When Enabled, the controller BIOS allows the controller to act as a bootable device. Disabling the BIOS allows another suitable controller to act as the boot device. When Enabled, the controller automatically rebuilds an array when the failed drive is replaced. When disabled, the array must be rebuilt manually. When Enabled, the controller constantly performs a verification on a redundant array to data integrity. In the case of RAID 1 or 10, consistency checks assure that the data between like blocks match. In the case of a RAID 5 or a RAID 0, consistency checks assure that data in the stripe and the calculated parity for the stripe match. Consistency checking processes reduce performance. For a RAID 5 or a RAID 50, the performance reduction is significant. When Enabled in systems that support BBS, controller is presented as a bootable device in the host system's BIOS for boot device selection. A-10