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7.6 SMART (Self-Monitoring Analysis and Reporting Technology)
C141-C013 415
h. DE temperature
The HDD measures the device temperature at one-minute intervals. It also
measures the temperature under one of the following conditions:
− When the LOG SENSE command is executed (Log Page 0D or 2F)
− When the REQUEST SENSE command is executed
− When retry processing is performed
If the EWASC bit (MODE SELECT parameter on Page 1C) is set and the
measured temperature exceeds the threshold specified by the log parameter
(Page 0D), the HDD issues a warning (Specified temperature exceeded [=0B-
01]).
Table 7.6 SMART thresholds
Attribute Threshold (sample size)
a Read error rate 300 errors (1,000,000 read sectors)
b Write error rate 300 errors (1,000,000 written
sectors)
c Seek error rate 300 errors (1,000,000 seeks)
d Number of remaining alternate
sectors
200 spare sectors
e Spin-up time 55 seconds (2 consecutive times)
f G-list update frequency attribute 300 times (1,000,000 read sectors)
g Cumulative power-on time 45,000 hours (no failure prediction
report)
h DE temperature 65
o
C