User manual

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4.5.3 Hard drive S.M.A.R.T. support
S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) is a diagnostic tool
for hard drives to deliver warning of drive failures in advance. S.M.A.R.T. provides
users chances to take actions before possible drive failure.
S.M.A.R.T. measures many attributes of the hard drive all the time and inspects the
properties of hard drives which are close to be out of tolerance. The advanced notice
of possible hard drive failure can allow users to back up hard drive or replace the
hard drive. This is much better than hard drive crash when it is writing data or
rebuilding a failed hard drive.
“S.M.A.R.T.” can display S.M.A.R.T. information of hard drives. The number is the
current value; the number in parenthesis is the threshold value. The threshold values
from different hard drive vendors are different; please refer to hard drive vendors’
specification for details.
S.M.A.R.T. only supports SATA drives. SAS drives do not have this function now. It
will show N/A in the web page for SAS drives.
Figure 4.5.3.1
4.5.4 UPS
“UPS” can set up UPS (Uninterruptible Power Supply).
Figure 4.5.4.1
(Figure 4.5.4.1: Without UPS.)
RAG362