Commands - Seagate ST3250623NS Product Manual

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-5 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4
nates unnecessary drive returns. The diagnostic software ships with all new drives and is also available at:
http://seatools.seagate.com.
You must have a recent BIOS or software package that supports S.M.A.R.T. to use this S.M.A.R.T. commands.
The table below shows the S.M.A.R.T. command codes that the drive uses.
Table 8: S.M.A.R.T. commands
Code in features register
D0
H
D2
H
D3
H
D4
H
D5
H
D6
H
D8
H
D9
H
DA
H
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.
4.3.3.1 S.M.A.R.T. Command Transport (SCT)
NL35 Series Serial ATA drives implement SCT technologies to enable the drive to perform in a nearline storage
environment.
The command transport uses log sectors to pass-through commands, to inquire about status, and to control
data flow. For detailed information about SCT, refer to the T13 working draft 1701DT-N, Rev. 5 (or later). T13
working draft publications are available in PDF form at the following URL:
http://www.t13.org/docs2005/DT1701r5-SCT.pdf
Or, for the latest list of downloadable working drafts, go to the following URL and download the latest revision:
http://www.t13.org/docs2005/
NL35 Series SATA Product Manual, Rev. B
S.M.A.R.T. command
S.M.A.R.T. Read Data
S.M.A.R.T. Enable/Disable Attribute Autosave
S.M.A.R.T. Save Attribute Values
S.M.A.R.T. Execute Off-line Immediate (runs DST)
S.M.A.R.T. Read Log Sector
S.M.A.R.T. Write Log Sector
S.M.A.R.T. Enable Operations
S.M.A.R.T. Disable Operations
S.M.A.R.T. Return Status
) that elimi-
H
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