Thecus N4200PRO User Manual download pdf (Page 63)

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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 Pending Sector

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.

Test Type Set short or long time to test.

Test Result Result of the test.

Test Time Total time of the test.

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.

NOTE

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.

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Thecus N4200PRO User Manual Page 63