Bad Block Scan - Thecus N2800 User Manual

S.M.A.R.T. Information
Item
Tray Number
Model
Power ON Hours
Temperature Celsius
Reallocated Sector
Count
Current Pending
Sector
Test Type
Test Result
Test Time
NOTE

Bad Block Scan

Description
Tray the hard disk is installed in.
Model name of the installed hard disk.
Count of hours in power-on state. The raw value of this attribute
shows total count of hours (or minutes, or seconds, depending on
manufacturer) in power-on state.
The current temperature of the hard disk in degrees Celsius.
Count of reallocated sectors. When the hard drive finds a
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 cannot 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.
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