Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications page 188

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 section 13.39.6). The receipt of a SMART EXECUTE OFF-LINE IMMEDIATE com-
mand 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.
13.39.1.6 S.M.A.R.T. Read Log Sector (subcommand D5h)
This command returns the specified log sector contents to the host.
The 512 bytes of data are returned at a command and the Sector Count value shall be set to one. The LBA Low
shall be set to specify the log sector address.
Log sector address
00h
01h
06h
09h
80h-9Fh
13.39.1.7 S.M.A.R.T. Write Log Sector (subcommand D6h)
This command writes 512 bytes of data to the specified log sector. The 512 bytes of data are transferred at a com-
mand and the LBA Low value shall be set to one. The LBA Low shall be set to specify the log sector address (See
Table 121: "S.M.A.R.T. Function Set (B0h)" on page 171). If a Read Only log sector is specified, the device
returns ABRT error.
13.39.1.8 S.M.A.R.T. Enable Operations (subcommand D8h)
This subcommand enables access to all S.M.A.R.T. capabilities within the device. Prior to receipt of a S.M.A.R.T.
Enable Operations subcommand, Attribute Values are neither monitored nor saved by the device. The state of
S.M.A.R.T.—either enabled or disabled—will be preserved by the device across power cycles. Once enabled, the
receipt of subsequent S.M.A.R.T. Enable Operations subcommands will not affect any of the Attribute Values.
Upon receipt of the S.M.A.R.T. Enable Operations subcommand from the host, the device asserts BSY, enables
S.M.A.R.T. capabilities and functions, clears BSY, and asserts INTRQ.
13.39.1.9 S.M.A.R.T. Disable Operations (subcommand D9h)
This subcommand disables all S.M.A.R.T. capabilities within the device including the device's attribute auto save
feature. After receipt of this subcommand the device disables all S.M.A.R.T. operations. Non self-preserved
Content
Log Directory
S.M.A.R.T. Error Log
S.M.A.R.T. Self-test Log
Selective self-test log
Host vendor specific
Travelstar 4K120 Hard Disk Drive Specification
Type
Read Only
Read Only
Read Only
Read/write
Read/Write
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