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32 Momentus 7200.3 SATA Product Manual, Rev. C
4.3.3 S.M.A.R.T. commands
S.M.A.R.T. provides near-term failure prediction for disc drives. When S.M.A.R.T. is enabled, the drive moni-
tors predetermined 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 to the host. Not all failures are predictable.
S.M.A.R.T. predictability is limited to the attributes the drive can monitor. For more information on S.M.A.R.T.
commands and implementation, see the Draft ATA-8 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4
H
) that elimi-
nates unnecessary drive returns. The diagnostic software ships with all new drives and is also available at:
http://seatools.sea
gate.com.
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 this feature. The table below shows the S.M.A.R.T. command codes that the
drive uses.
Note. If an appropriate code is not written to the Features Register, the command is aborted and 0x 04
(abort) is written to the Error register.
Table 9: S.M.A.R.T. commands
Code in features register S.M.A.R.T. command
D0
H
S.M.A.R.T. Read Data
D1
H
Vendor-specific
D2
H
S.M.A.R.T. Enable/Disable Attribute Autosave
D3
H
S.M.A.R.T. Save Attribute Values
D4
H
S.M.A.R.T. Execute Off-line Immediate (runs DST)
D5
H
S.M.A.R.T. Read Log Sector
D6
H
S.M.A.R.T. Write Log Sector
D7
H
Vendor-specific
D8
H
S.M.A.R.T. Enable Operations
D9
H
S.M.A.R.T. Disable Operations
DA
H
S.M.A.R.T. Return Status