Mylex DAC960PG, Installation Manual

Page: 46 / 106

Drive Management
2-22 DAC960PG Installation Guide
When a disk reports a media error during a write, the controller issues a
REASSIGN command to the disk, and writes the data out to a new location
on the disk.
Checking Disk Consistency
A consistency check is a process that verifies the integrity of redundant data.
For example, performing a consistency check of a mirrored drive assures
that the data on both drives of the mirrored pair are exactly the same. To
verify RAID 3 or RAID 5 redundancy, a consistency check reads all
associated data blocks, computes parity, reads parity, and verifies that the
computed parity matches the read parity.