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For better protection and avoiding single short period of high temperature triggering auto shutdown,
controllers use multiple condition judgments for auto shutdown, below are the details of when the Auto
shutdown will be triggered.
1. There are 3 sensors placed on controllers for temperature checking, they are on core
processor, PCI-X bridge, and daughter board. controller will check each sensor for every 30
seconds. When one of these sensor is over high temperature value for continuous 3 minutes,
auto shutdown will be triggered immediately.
2. The core processor temperature limit is 85 . The PCI-X bridge temperature limit is 80 .
The daughter board temperature limit is 80 .
3. If the high temperature situation doesn’t last for 3 minutes, controller will not do auto
shutdown.
3.7.3 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 of hard drive vendors are different;
please refer to vendors’ specification for details.
S.M.A.R.T. only supports SATA drive. SAS drive does not have. It will show N/A in this web page.
Figure 3.7.3.1