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RAID Volume Data Verify and Repair


Last Reviewed: 30-Jun-2016
Article ID: 000006401

The RAID volume data verification process identifies any inconsistencies or bad data on a RAID 0, RAID 1, RAID 5, or RAID 10 volume.

The RAID volume data verification and repair process identifies and repairs any inconsistencies or bad data on a RAID 1, RAID 5, or RAID 10 volume.

The following describes what occurs for each RAID level:


RAID Level Verify Verify and Repair
RAID 0 Bad blocks are identified. N/A
RAID 1 Bad blocks are identified Bad blocks are reassigned.
  Data on the mirror drive is compared to data on the source drive. If the data on the mirror drive does not match the data on the source drive, the data on the mirror is overwritten with the data on the source.
RAID 5 Bad blocks are identified. Bad blocks are reassigned.
  Parity is recalculated and compared to the stored parity for that stripe. If the newly calculated parity does not match the stored parity, the stored parity is overwritten with the newly calculated parity.
RAID 10 Bad blocks are identified. Bad blocks are reassigned.
  Data on the mirror is compared to data on the source. If the data on the mirror does not match the data on the source, the data on the mirror is overwritten with the data on the source.