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Media Scan
The media scan feature sequentially checks each physical drive in a selected logical drive,
block by block, for bad blocks. If a bad block is encountered, the controller rebuilds the
data from the bad block onto a good block if one is available on the physical drive. If no
good blocks are available on the physical drive, the controller designates the physical drive “Bad,”
generates an event message, and if a spare drive is available, will begin rebuilding data from the
bad physical drive onto the spare.
A media scan starts automatically after a logical drive completes initialization and continues unless you
stop it manually. If you have stopped the automatic continuous media scan, you can start a media
scan manually on a logical drive or a single physical drive that makes up a logical drive. It is useful to run a media scan if a drive has failed, if drive
errors are encountered, or when a rebuild is required after replacing a drive.
- To start a media scan on a logical drive, click the Logical Drives tab, and select the logical drive to scan.
To start a media scan on a physical drive that makes up the logical drive, select the Disks tab, and
select the physical drive to scan.
- Select a Media Scan Priority:
- Low – Media scan is not performed until other tasks have been completed.
- Normal – Media scan is typically performed within three seconds.
- Improved – Media scan is typically performed within one second.
- High – Media scan is performed immediately.
- Select an Iteration Count to specify whether the
physical drives that comprise the selected logical drive are checked
one time or continuously. Single Time is the default value.
- Click OK.
The scan progress is displayed in the Array Controller Progress window. Depending on the size of the logical drive
and the number of physical disks it contains, or the size of the physical drive, the scanning process might take some time to complete.
- When the Controller Array Progress window shows 100% completion, check the event log to determine
the condition of the physical disks.
Stopping a Media Scan on a Logical Drive or a Physical Drive
- Select a logical drive.
- Choose Array Administration > Media Scan.
After a few moments, the Media Scan window is displayed.
- To stop a media scan on a logical drive, click the Logical Drives tab, and select the
logical drive on which you want to stop the scan.
To stop a media scan on a physical drive that makes up the logical drive, select the Disks tab, and
select the physical drive on which you want to stop the scan.
- Click Abort Media Scan.
- Click OK to continue.
- Click Close on the Starting Array Administration window.
NOTE: To stop a media scan on a physical drive, you can also select Abort on the
Controller Array Progress window.
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