Seagate ST3250623NS ユーザーズマニュアル
NL35 Series SATA Product Manual, Rev. B
29
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.
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
H
) that elimi-
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.
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.
(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.
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:
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/
Table 8:
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