Maxtor D740X-6L 20.0 AT Product Manual page 86

ATA Bus Interface and ATA Commands
4 G I K U V G T
Cylinder High
Device/Head
Command
NORMAL OUTPUTS - If the device has not detected a threshold exceeded
condition, the device sets the Cylinder Low register to 4Fh and the Cylinder High
register to C2h. If the device has detected a threshold exceeded condition, the device
sets the Cylinder Low register to F4h and the Cylinder High register to 2Ch.
ERROR OUTPUTS - If the device does not support this command, if SMART is
disabled or if the values in the Features, Cylinder Low or Cylinder High registers are
invalid, an Aborted command error is posted.
4 G I K U V G T
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
PREREQUISITES - DRDY set equal to one. SMART enabled.
DESCRIPTION - This command is used to communicate the reliability status of
the device to the host at the host's request. Upon receipt of this command the device
sets BSY, saves any updated attribute values to non-volatile memory and compares the
updated attribute values to the attribute thresholds.
        5 / # 4 6 5 # 8 ' # 6 6 4 + $ 7 6 ' 8 # . 7 ' 5
COMMAND CODE - B0h
TYPE - Optional - SMART Feature set. If the SMART feature set is implemented,
this command is optional and not recommended.
PROTOCOL - Non-data command
INPUTS - The Features register shall be set to D3h. The Cylinder Low register shall
be set to 4Fh. The Cylinder High register shall be set to C2h.
6-20 Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT
  
1 1
  
na UNC na
na
na
na
na
obs na obs
BSY DRD DF
Y
  
C2h
D
B0h
  
IDNF na ABRT na
DEV na
na DRQ na
 
 
na
na ERR