3.9 Media Patrol
The media patrol feature provides entire reading for the following target HDDs. Because of aged deterioration, it may not be possible to detect faults of HDDs until they are accessed. The media patrol, or routine read and check of data in HDDs, allows such faults to be detected as soon as possible. Therefore, you can take proper measures early.
-HDDs configuring RAID
-Spare HDDs
If accessing to a HDD occurs during media patrol, the media patrol is paused until the completion of the access. Accordingly, media patrol hardly degrades the system performance. Because the media patrol feature checks HDDs in a period of low system load, it may not be able to advance its processing in a system entered in high load status consistently. Therefore, use the feature in system environment of comparatively low load such as in the night.
IMPORTANT:
Media patrol is scheduled by default to be run at 0:00 a.m. on Wednesday every week just after installation of WebPAM PRO. Change the schedule to be suit to the environment you use.
The RAID system does not allow media patrol to be set in HDDs individually.
Media patrol is not done for HDDs having not been used to configure a disk array or for HDDs not specified as spare. Specify unconfigured HDDs to hot spare.
Media patrol can detect media errors of HDDs early and only repair HDDs being members of redundant RAIDs. However, it does not check whether HDDs are consistent with parity.
The feature can run media patrol of specified HDDs at the specified time only once (scheduled media patrol is run periodically every specified start time). Media patrol is not run consistently.
Follow the procedure below to provide media patrol.
1.Click the subsystem (ST EX4650EL) icon in the Tree View.
2.Click the downward arrow at the right end of the Background Activities tab in the Management Window and then click Start Media Patrol.
3.Click [Start].
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