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To Scan Physical Drives for Bad Blocks (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, begins rebuilding
data from the bad physical drive onto the spare. 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. A media scan
does not start automatically after a logical drive completes initialization.
Starting a Media Scan on
a Logical Drive or a Physical
Drive
- Select a logical drive.
- Choose Array Administration >
Media Scan.
After a few minutes, the Media Scan window is displayed.
- Start a media scan.
- 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.
- Choose 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 Run Media Scan, and click
OK to continue.
NOTE: If a media scan is already
running, the Run Media Scan button is unavailable.
- Click Close on the Starting
Array Administration window.
The scan progress is displayed in the Controller Array Progress
window. Depending on the size of
the logical drive and the number of physical disks it contains, 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 click Abort on the Controller
Array Progress window.
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