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7.6 SMART (Self-Monitoring Analysis and Reporting Technology)
C141-C013 413
Sample size 1,000,000 read sectors
Threshold 300 errors
Target READ
commands
READ, READ LONG, VERIFY, verify processing for
WRITE AND VERIFY, media validation read during
automatic alternate processing, media validation read
during FORMAT UNIT command execution, user data
area read during Drive Self Test/Background Media
Scan
b. Write error rate
The HDD monitors the number of write errors that have occurred during
write processing, in relation to the number of sectors that have been actually
written and the number of sectors contained in the sample. If the number of
write errors reaches the threshold, the HDD considers that a failure prediction
reporting condition has developed.
The written sectors and write errors counted include those involved in write
processing that was explicitly performed by WRITE commands.
Sample size 1,000,000 written sectors
Threshold 300 errors
Target WRITE
commands
WRITE, WRITE LONG, VERIFY, write processing
for WRITE AND VERIFY, WRITE SAME, media
validation write during automatic alternate processing,
FORMAT UNIT command
c. Seek error rate
The HDD monitors the number of seek errors that have occurred during seek
processing, in relation to the number of seeks that have been actually
performed on the sample. If the number of seek errors reaches the threshold,
the HDD considers that a failure prediction reporting condition has
developed.
The seek operations and seek errors counted include those involved in seek
processing that was explicitly performed by commands or performed
otherwise for any reason within the HDD.
Sample size 1,000,000 seek operations
Threshold 300 errors