QNAP TVS-472XT 4-Bay NAS Enclosure - Manual (Page 36)

Information Description
Disk Capacity The capacity of the disk, in both binary and decimal formats
Note
• Binary format assumes that 1 GB =
1,073,741,824 bytes. This is the true capacity
of the disk and is used by computers and
operating systems such as QTS.
• Decimal format assumes that 1 GB =
1,000,000,000 bytes. This format is used
by disk manufacturers and appears in
advertising, on the disk's box, and in the disk's
hardware specifications.
• Due to differences in the number of bytes
per gigabyte, a disk's binary capacity will
be slightly lower than its decimal capacity.
For example, a disk advertised as 500 GB
(decimal) has a true capacity of 456 GB
(binary).
Bus Type The interface that the disk uses
Status The hardware status of the disk
Current Speed The speed at which the disk is connected to the enclosure
Maximum Speed The maximum transfer speed supported by the drive bay or slot
that the disk is installed in
Temperature The current temperature of the disk
Disk temperature is retrieved from the disk's firmware using
S.M.A.R.T.
Disk Access History (I/O) • Good: QTS has not detected any I/O errors on the disk.
• Error: QTS has detected one or more I/O errors on the disk.
Disk SMART Information Important
If any of the S.M.A.R.T. attribute values reach
the threshold set by the disk manufacturer or
a predefined threshold determined by QTS, this
field will change to Warning .
Estimated Life Remaining The remaining life of the disk, as calculated by the disk's
firmware. When the value reaches 0, you should replace the disk.
This information is only available for solid-state drives (SSDs).
Disk Actions
Action Description
Disk Info Displays disk details, including the disk manufacturer, model, serial
number, disk capacity, bus type, firmware version, ATA version, and ATA
standard.
Disk Health Displays disk S.M.A.R.T information.
For details, see Disk Health Information .
QTS 4.4.x User Guide
Storage & Snapshots 35