Hitachi 7K100 - Travelstar - Hard Drive Specifications page 180

After the scan of the selected spans described above, a user may wish to have the rest of media read scanned as an
off-line scan. In this case, the user shall set the flag to enable off-line scan in addition to the other settings. If an
error occurs during the scanning of the test spans, the error is reported in the self-test execution status in the
SMART READ DATA response and the off-line scan is not executed. When the test spans defined have been
scanned, the device shall then set the offline scan pending and active flags in the Selective self-test log to one, the
span under test to a value greater than five, the self-test execution status in the SMART READ DATA response to
00h, set a value of 03h in the off-line data collection status in the SMART READ DATA response and shall proceed
to do an off-line read scan through all areas not included in the test spans. This off-line read scan shall completed as
rapidly as possible, no pauses between block reads, and any errors encountered shall not be reported to the host.
Instead error locations may be logged for future reallocation. If the device is powered-down before the off-line
scan is completed, the off-line scan shall resume when the device is again powered up. From power-up, the
resumption of the scan shall
be delayed the time indicated in the Selective self-test pending time field in the Selective self-test log. During this
delay time the pending flag shall be set to one and the active flag shall be set to zero in the Selective self-test log.
Once the time expires, the active flag shall be set to one, and the off-line scan shall resume. When the entire media
has been scanned, the off-line scan shall terminate, both the pending and active flags shall be cleared to zero, and
the off-line data collection status in the SMART READ DATA response shall be set to 02h indicating completion.
During execution of the Selective self-test, the self-test executions time byte in the Device SMART Data Structure
may be updated but the accuracy may not be exact because of the nature of the test span segments. For this reason,
the time to complete off-line testing and the self-test polling times are not valid. Progress through the test spans is
indicated in the selective self-test log.
A hardware or software reset shall abort the Selective self-test except when the pending bit is set to one in the
Selective self-test log (see 7.39.7). The receipt of a SMART EXECUTE OFF-LINE IMMEDIATE command with
0Fh, Abort off-line test routine, in the LBA Low register shall abort Selective self-test regardless of where the
device is in the execution of the command. If a second self-test is issued while a selective self-test is in progress,
the selective self-test is aborted and the newly requested self-test is executed.
Travelstar 7K100 Hard Disk Drive Specification
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