30 U10 Family Product Manual , Rev. A
Note. At power-on, or after a hardware or software reset, the default
values of the features are as indicated above.
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 ti me. 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. pred ictabilit y 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.

This drive is shipped with S.M.A.R.T. features disab led. 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.
42HUltra DMA mode 2
43HUltra DMA mode 3
44HUltra DMA mode 4
05HEnable advanced power management.
55HDisable read look-ahead (read cache) feature.
82HDisable write cache.
AAHEnable read look-ahead (read cache) feature

(default).

Code in Features
Register S.M.A.R.T. Command
D0HS.M.A.R.T. Read Data
D1HObsolete
D2HS.M.A.R.T. Enable/Disable Attribute Autosave
D3HS.M.A.R.T. Save Attribute Values
D4HS.M.A.R.T. Execute Off-line Immediate
D5HS.M.A.R.T. Read Log Sector
D6HS.M.A.R.T. Write Log Sector
D7HObsolete