Planet NAS-5400, User Manual

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Moreover, when the hard disk is at
“
Damages in system area
”
or
“
With bad sectors
”
status, you
can check the bad sector details of the hard disk by moving the mouse over the hard disk
graphics on this page. When bad sectors occur on the hard disk, the NAS server provides a
Dynamic Bad Sector Recovery (DBSR) mechanism by reserving a space on each partition of the
hard disk for mapping bad sectors when bad sectors are used and recovering data in the future,
so the file can be protected against access failure.
i. Bad sector mapping: If a HDD bad sector is used when writing data to an existing volume,
the bad sector will be automatically mapped to the reserved space. Any request for the data
in the future will be redirected to the mapped space.
ii. Bad sector recovery: On a RAID1 volume, if a HDD bad sector occurs on an existing data
entry, when reading the data, the system will still generate the correct data by calculating
the RAID1 consistency and map the data to a reserved space. Any request for the data in
the future will be redirected to the mapped space.
Icon description:
The disk is normally operating.