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3.2.4 S.M.A.R.T. commands
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 drive attributes that are susceptible to degradation over time. If
self-monitoring determines that a failure is likely, S.M.A.R.T. makes a
status report available so that the host can prompt the user to back up
data on the drive. Not all failures are predictable. S.M.A.R.T. predictability
is limited to only those attributes the drive can monitor. For more
information on S.M.A.R.T. commands and implementation, see the
Working Draft of the Proposed American National Standard X3T10/2008D
Revision 6, Information Technology AT Attachment-3
Interface (ATA-3)
.
This drive is shipped with S.M.A.R.T. features disabled. You must have
a recent BIOS or software package that supports S.M.A.R.T. to enable
the feature. The table below shows the S.M.A.R.T. command codes that
these drives use.
Before executing a S.M.A.R.T. command by writing B0
H
to the Command
Register, the host must do the following:
• Write the value 4F
H
to the Cylinder_Low register.
• Write the value C2
H
to the Cylinder_High register.
• Write the appropriate S.M.A.R.T. code to the Features register, as
shown in the table below:
Code in
Features
Register S.M.A.R.T. Command
Supported by
Marathon 2250 and
Marathon 1680
D8
H
Enable S.M.A.R.T. Operations Yes
D9
H
Disable S.M.A.R.T. Operations Yes
DA
H
Return S.M.A.R.T. Status Yes
Note.
If an appropriate code is not written to the Features Register, the
command will be aborted and 0
x
04 (abort) will be written to the
Error register.
34 Marathon 2250 and Marathon 1680 Product Manual