Seagate ST35040A, Product Manual

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You can disable The Write Reallocation, in addition to write cache by
using the Set Feature command Disable Write Cache, feature value 82
H.
This feature is not implemented for the Write Long command.
You can disable both the Write Reallocation and write cache using value
82
H
. These two features coexsist as a pair and are enabled/disabled
together.
3.2.6 S.M.A.R.T. command (B0
H
)
Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) is an
emerging technology that provides near-term failure prediction for disc
drives. When S.M.A.R.T. is enabled, the Seagate drive monitors prede-
termined attributes within itself that are susceptible to degradation over
time. S.M.A.R.T. makes a status report available so that the host can
prompt the user to back up the drive if self-monitoring determines that a
failure is likely. Not all failures are predictable. S.M.A.R.T. predictability
is limited to only those attributes the drive can monitor.
The S.M.A.R.T. feature is disabled at the factory. You must have a BIOS,
software driver or application software that supports S.M.A.R.T. to
enable this feature. The table below shows the S.M.A.R.T. command
codes the Seagate drives use.
Note. To implement a S.M.A.R.T. command, the host must write the
value 0x4F to Cylinder_lo register and the value 0xC2 to the
Cylinder_hi register at the same time it writes the S.M.A.R.T.
command code to the Features register. If these values are not
included with the command code, the command is aborted and
0x04 (abort) is written to the Error register.
Command code Feature description
D2
H
Enable/disable attribute autosave
D8
H
Enable operation
D9
H
Disable operation
DA
H
Return S.M.A.R.T. status
Medalist Pro 6450/5040 Product Manual, February 1997 35