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4 s.m.a.r.t. commands – Seagate Barracuda ST3120022A User Manual

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Barracuda 7200.7 Product Manual, Rev. E

31

4.1.4

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 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-6 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.

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 0x 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 (runs DST)

D5

H

S.M.A.R.T. Read Log Sector

D6

H

S.M.A.R.T. Write Log Sector

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