Nec Disk Array Controller N8103-89 Manuel d'utilisateur télécharger pdf (Page 97)

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.

Notice

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

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 Disk Array Controller N8103-89 Manuel d'utilisateur Page 97