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38 Video 3.5 HDD Product Manual, Rev. H
Serial ATA Interface www.seagate.com
4.3.3 S.M.A.R.T. commands
S.M.A.R.T. provides near-term failure prediction for disk drives. When S.M.A.R.T. is enabled, the drive monitors
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-5 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4
H
) that eliminates
unnecessary drive returns. The diagnostic software ships with all new drives and is also available at:
http://seatools.seagate.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.
07
H
07H PUIS feature set device spin-up
10
H
Enable use of SATA features
55
H
Disable read look-ahead (read cache) feature.
82
H
Disable write cache.
86
H
Disable the PUIS feature set.
90
H
Disable use of SATA features.
AA
H
Enable read look-ahead (read cache) feature (default).
F1
H
Report full capacity available.
Note
At power-on, or after a hardware or software reset, the default values of the features are as indicated above.
Table 11 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
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
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
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 10 Set Features command values (continued)