30
Barracuda ATA II 100 Family Product Manual, Rev. A
3.1.4 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 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:
www.seagate.com/support/npf/seatools/seatool-entry.shtml
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 0
x
04 (abort) is written to the Error
register.
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
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
