A media scan is a background process that runs on all in the for which it has been enabled. A media scan provides error detection on the disk drive media. Enabling the media scan process lets the process find media errors before they disrupt normal disk drive reads and normal disk drive writes. The media scan process scans all logical drive data to verify that it can be accessed. You also have the option to scan the logical drive data.
Note:
You cannot enable background media scans on a logical drive comprised of Solid State Disk (SSD) disk drives.You can enable and set the duration over which the media scan runs by selecting Logical Drive >> Change >> Media Scan Settings . A media scan discovers the errors shown in the table and reports them to the .
Error |
Description |
Result |
---|---|---|
Unrecovered media error |
The data could not be read on its first attempt or on any subsequent retries. |
Logical Drives with redundancy protection – Data is reconstructed, rewritten to the disk drive, and verified. The error is reported to the Event Log. Logical Drives without redundancy protection – The error is not corrected but is reported to the Event Log. Logical drives without redundancy protection include logical drives and degraded , , , and logical drives. |
Recovered media error |
The disk drive could not read the requested data on its first attempt but succeeded on a subsequent attempt. |
The data is rewritten to the disk drive and verified. The error is reported to the Event Log. |
Redundancy mismatches |
Redundancy errors are found. |
The first 10 redundancy mismatches found on a logical drive are reported to the Event Log. Note – The media scan checks for redundancy only if the optional Redundancy check box is selected. |
Unfixable error |
The data could not be read, and parity or redundancy information could not be used to regenerate it. For example, redundancy information cannot be used to reconstruct data on a degraded logical drive. |
The error is reported to the Event Log. |