Seagate ST34321A Product Manual - Page 38

30 Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 3.2.4 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-4 Standard. These drives are 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 the feature. The table below shows the S.M.A.R.T. command codes that these drives use. Code in Features Register S.M.A.R.T. Command Supported by ST38641A ST36531A ST34321A ST33221A ST32110A D0H S.M.A.R.T. Read Data Yes D1H Vendor-specific Yes D2H S.M.A.R.T. Enable/Disable Attribute Autosave Yes D3H S.M.A.R.T. Save Attribute Values Yes D4H S.M.A.R.T. Execute Off-line Immediate Yes D7H Vendor-specific Yes D8H S.M.A.R.T. Enable Operations Yes D9H S.M.A.R.T. Disable Operations Yes DAH S.M.A.R.T. Return Status Yes Note. If an appropriate code is not written to the Features Register, the command is aborted and 0x04 (abort) is written to the Error register.