S.m.a.r.t. Information; Raid Information - Thecus N7700 User Manual

NOTE

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
Tray Number
Model
Power ON Hours
Temperature Celsius
Reallocated Sector
Count
Current Pending
Sector
Back
NOTE

RAID Information

From the Storage menu, choose the RAID item and the RAID List screen
appears.
This screen lists the RAID volumes currently residing on the N7700. 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.
To configure your RAID settings, press the RAID Config button to go to the
RAID Configuration screen.
When the Status shows Warning, it usually means there are bad sectors
on the hard disk. It is shown only as a precaution and you should
consider changing the drives.
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 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 Back 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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