User's Manual

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