S.m.a.r.t. Information; Raid Information - Thecus 1U4500R User Manual

S.M.A.R.T. Information

On the Disks Information screen, the status of each disk
will be displayed in the Status column. Clicking on an OK
or Warning link will display the S.M.A.R.T Information
window for that particular disk.
S.M.A.R.T. Information
Item
Power ON Hours
Reallocated Sector
Count
Current Pending
Sector
Cancel
NOTE

RAID Information

From the Storage menu, choose the RAID
item and the RAID Information screen
appears.
Description
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.
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 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.
Press Cancel to go back to the Disks Information screen.
If the Reallocated Sector Count or Current Pending Sector of a hard disk drive is not
zero, 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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