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Copyright ©2000 Toshiba corporation. All rights reserved.
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10.8.33.10 SMART Return Status
COMMAND CODE
1 0 1 1 0 0 0 0
REGISTER
REGISTER SETTING NORMAL COMPLETION
DR DRIVE No. no change
CY C24Fh C24Fh/2CF4h
HD no change
SN no change
SC no change
FT DAh no change
If an impending failure is not predicted, the drive sets the Cylinder Low register to 4Fh and the Cylinder High
register to C2h. If an impending failure is predicted, the drive sets the Cylinder Low register to F4h and the
Cylinder High register to 2Ch.
This command is used to communicate the reliability status of the drive to the host’s request. Upon receipt of
this command the drive sets BSY, saves any parameters monitored by the drive to non-volatile memory and
checks the drive condition.
10.8.33.11 SMART Enable/Disable Automatic Off-line
COMMAND CODE
1 0 1 1 0 0 0 0
REGISTER
REGISTER SETTING NORMAL COMPLETION
DR DRIVE No. no change
CY C24Fh no change
HD no change
SN no change
SC 00h/F8h no change
FT DBh no change
This subcommand enables and disables the optional feature that causes the device to perform the set of off-line
data collection activities that automatically collect attribute data in an off-line mode and then save this data to the
device’s non-volatile memory. This subcommand may either cause the device automatically initiate or resume
performance of its off-line data collection activities; or this command may cause the automatic off-line data
collection feature to be disabled.
A value of zero written by the host into the device’s Sector Count register before issuing this subcommand shall
cause the feature to be disabled. Disabling this feature does not preclude the device from saving attribute values
to non-volatile memory during some other normal operation such as during a power-on or power-off sequence or
during an error recovery sequence.
A value of F8h written by the host into the device’s Sector Count register before issuing this command shall
cause this feature to be enabled. Any other non-zero value written by the host into this register before issuing this
subcommand is vendor specific.
Automatic off-line data collection is executed every 24 power-on hours.