D-Link ShareCenter Pro, Руководство пользователя

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
PDM also counts the number of media errors reported by
Media Patrol.

A disk drive becomes unhealthy when:

A SMART error is reported

The bad sector remapping table fills to the specified
level.

You can specify the maximum levels for the reassigned and
error blocks in PDM settings. When the table fills to a
specified value, PDM triggers a migration of data from the
suspect drive (the disk drive with the bad sectors) to a
replacement physical drive.

During data migration, you will have access to your logical
drives but they will respond more slowly to read/write tasks
because of the additional operation. The time required for
data migration depends on the size of the disk drives.

PDM is enabled on all disk arrays by default. You can
disable PDM in the disk array settings, however that action
is not recommended.
−
Transition:

Transition is the Process of replacing a revertible spare
drive that is currently part of a disk array with an
un-configured physical drive or a non-revertible spare. The
revertible spare drive returns to its original status. In order
to run the Transition function, the spare drive must be
revertible.

In addition, you must specify an un-configured physical
drive of the same or larger capacity and same media type
as the revertible spare drive.
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Synchronization:

Synchronization is automatically applied to logical drives
when they are created. Synchronization recalculates the
redundancy data to ensure that the working data on the
physical drives is Properly in sync.

Mouse-over on the logical drive, click the View button, and