Seagate Exos X20z SATA Product Manual, Rev. B
47
www.seagate.com
Serial ATA (SATA) interface
1.5.3.5
SMART commands
SMART provides near-term failure prediction for disk drives. When SMART is enabled, the drive monitors
predetermined drive attributes that are susceptible to degradation over time. If self-monitoring determines that a
failure is likely, SMART makes a status report available to the host. Not all failures are predictable. SMART predictability
is limited to the attributes the drive can monitor. For more information on SMART commands and implementation,
see the
Draft
ATA-5 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST SMART 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/downloads/seatools/
This drive is shipped with SMART features disabled. Users must have a recent BIOS or software package that supports
SMART to enable this feature. The table below shows the SMART 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.
Table 11 SMART commands
Code in features register
SMART command
D0
H
SMART Read Data
D2
H
SMART Enable/Disable Attribute Autosave
D3
H
SMART Save Attribute Values
D4
H
SMART Execute Off-line Immediate (runs DST)
D5
H
SMART Read Log Sector
D6
H
SMART Write Log Sector
D8
H
SMART Enable Operations
D9
H
SMART Disable Operations
DA
H
SMART Return Status
