Raid Information - Thecus N0503 User Manual

Count
Current Pending Sector
Test Type
Test Result
Test Time
NOTE
Bad Block Scan
On the Disks Information screen, you may also perform disk bad block scan,
simply to click "Click to start" to start with. The result is only for reference and
system will not take any action from its result.
The testing result will be stay till system reboot with "Yet to start" displayed as
default.

RAID Information

From the Storage menu, choose the RAID item and the RAID Information screen
appears.
This screen lists the RAID volumes currently residing on the Thecus IP storage. From
this screen, you can get information about the status of your RAID volumes, as well
as the capacities allocated for data, and iSCSI. There is also a graph which
represents how the RAID volume is currently allocated.
read/write/verification error, it marks this sector as "reallocated"
and transfers data to a special reserved area (spare area).
This process is also known as remapping and "reallocated" sectors
are called remaps. This is why, on a modern hard disks, you can
not see "bad blocks" while testing the surface - all bad blocks are
hidden in reallocated sectors. However, the more sectors that are
reallocated, the more a decrease (up to 10% or more) can be
noticed in disk read/write speeds.
Current count of unstable sectors (waiting for remapping). The
raw value of this attribute indicates the total number of sectors
waiting for remapping. Later, when some of these sectors are read
successfully, the value is decreased. If errors still occur when
reading sectors, the hard drive will try to restore the data, transfer
it to the reserved disk area (spare area), and mark this sector as
remapped. If this attribute value remains at zero, it indicates that
the quality of the corresponding surface area is low.
Set short or long time to test.
Result of the test.
Total time of the test.
If the Reallocated Sector Count > 32 or Current Pending Sector of a hard disk
drive > 0 , the status of the disk will show "Warning". This warning is only used
to alert the system administrator that there are bad sectors on the disk, and
they should replace those disks as soon as possible.
63