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3.2.3 Standby timer timeout period
The Idle command and Standby command Sector Count registers are
used to activate the Standby timer. The host can enable the Standby
timer by placing a value in the sector-count register of the Idle command
or Standby command. The value corresponds to a predetermined period
of drive inactivity. The table below lists the values the Seagate drives use
and their corresponding timeout period.
Sector Count Register contents Corresponding timeout period
0 (0
H
) Timeout disabled
1–12 (1
H
–C
H
) value = 60 seconds
13–240 (D
H
–F0
H
) (value * 5) seconds
241–251 (F1
H
–FB
H
) (value – 240 * 30) minutes
252 (FC
H
) 21 minutes
253 (FD
H
) 8 hours
254 (FE
H
) Reserved
255 (FF
H
) 21 minutes 15 seconds
The drives are shipped with the Standby timer disabled.
3.2.4 Sleep command (99
H
, E6
H
)
This command performs the same function as the Standby Immediate
command (94
H
, E0
H
).
3.2.5 Automatic Reallocation
This feature allows the drive to identify grown media defects and to
reallocate the sector without host intervention using both Read and Write
Automatic Reallocation.
You can disable Read Reallocation by using the Set Features command
Disable Read Automatic Reallocation, feature value 84
H
. This feature is
not used for the Read Long command.
You can disable The Write Reallocation, in addition to write cache by
using the Set Feature command Disable Write Cache, feature value 82
H.
This feature is not implemented for the Write Long command.
34 Medalist Pro 6450/6451 Product Manual, Rev. B