ZyXEL Communications NAS540, User Manual

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Chapter 8 Storage Manager
Cloud Storage User’s Guide
77
8.3.6.2 SMART Info
Use this screen to display more details information about the volume.
Click S.M.A.R.T Info in the S.M.A.R.T Overview screen to display the following.
Reallocated_
Sector_Ct This field shows the total number of reallocated sectors on the hard drive. When the hard
drive detects a read/write/verification error, it marks the sector as “reallocated” and transfers
the data to a specially reserved (spare) area. The process is also known as remapping with
“reallocated” sectors known as remaps. The more sectors the hard disk has to reallocate, the
slower read and write speeds become.
Command_
Timeout This field shows the temperature of the hard disk in degrees celsius (
o
C) and fahrenheit (
o
F).
Model Family This field shows the model family of the hard disk.
Device Model This field shows the hard disk model number that uniquely identifies a hard disk.
Serial
Number This field shows this individual hard disk’s serial number from the manufacturer.
LU WWN
Device Id This field shows the hard disk’s Logical Unit World Wide Name Device Identifier.
Firmware
Version This field shows the version number of the hard disk’s internal operating software.
User
Capacity This field shows the hard disk’s usable size.
Sector Sizes This field shows the sector size of the hard disk. A sector is the smallest physical storage unit
on a hard disk. Normally it is 512 bytes.
Rotation Rate This field shows the rotational speed of the hard disk, measured in revolutions per minute
(rpm).
ATA Version This field shows the hard disk’s Advanced Technology Attachment version number.
SATA Version This field shows the hard disk’s Serial ATA (SATA) version number.
Local Time This field shows the local time that the hard disk is using.
SMART
support This field shows whether or not the hard disk is SMART-capable.
SMART
support This field shows whether or not the hard disk has SMART monitoring turned on.
Close Click this button to close the screen.
Table 19
S.M.A.R.T Overview (continued)
LABEL DESCRIPTION