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2. Media Patrol

The media patrol gives the read & verify test in the entire area of HDDs. It can be done for all HDDs assigned to logical drives and hot-spare disks.

The media patrol allows subsequent defects of HDDs to be detected and repaired. Accordingly, routine media patrol is recommended as preventive maintenance. Routine media patrol can be done by scheduling.

For HDDs configuring redundant logical drives in the RAID1, RAID5, or RAID10 level or those assigned to hot-spare disks, error sectors detected during media patrol can be repaired. For HDDs configuring non-redundant logical drives in the RAID0 level, error sectors are registered to the bad sector list (BSL) to be managed.

If an access to a HDD being subject to media patrol occurs, the media patrol is interrupted temporarily and continued from the interrupted point at the completion of the access. Thus, the media patrol can hardly decrease the system performance.

Note the following for the media patrol:

„In an environment of frequent HDD accesses, media patrol cannot be

advanced well. In such environment, it is recommended to use

Notice synchronization for preventive maintenance instead of media patrol.

„To enable media patrol, WebPAM must be installed.

„For the detailed operation, refer to the online manual "Web-based Promise Array Manager User’s Guide" saved in the "S-ATA Array Management Software" CD-ROM coming with the card.

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NEC N8103-89 manual Media Patrol