Quantum FIREBALL PLUS AS 10.2 Product Manual page 104

ATA Bus Interface and ATA Commands
6.7.9.3 6.7.9.3 6.7.9.3 6.7.9.3 SMART READ ATTRIBUTE THRESHOLDS SMART READ ATTRIBUTE THRESHOLDS SMART READ ATTRIBUTE THRESHOLDS SMART READ ATTRIBUTE THRESHOLDS
COMMAND CODE - B0h
TYPE - Optional - SMART Feature set. If the SMART feature set is implemented,
this command is optional and not recommended.
PROTOCOL - PIO data in
INPUTS - The Features register shall be set to D1h. The Cylinder Low register shall
be set to 4Fh. The Cylinder High register shall be set to C2h.
Register Register
Register Register
Features
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
NORMAL OUTPUTS - None
ERROR OUTPUTS - If the device does not support this command, if SMART
disabled or if the values in the Features, Cylinder Low or Cylinder High registers
are invalid, an Aborted command error is posted.
Register Register Register Register
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
PREREQUISITES - DRDY set equal to one. SMART enabled.
DESCRIPTION - This command returns the device's attribute thresholds to the
host. Upon receipt of this command from the host, the device sets BSY, reads the
attribute thresholds from non-volatile memory, sets DRQ, clears BSY, asserts
INTRQ, and then waits for the host to transfer the 512 bytes of attribute threshold
information from the device via the Data register.
The following defines the 512 bytes that make up the attribute threshold
information.
The sequence of active attribute thresholds must appear in the same order as their
corresponding attribute values (see Section 6.7.9.5).
The data structure revision number shall be the same value used in the device
attribute values data structure.
6-42 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
7 7 7 7 6 6 6 6 5 5 5 5
1 1
7 7 7 7 6 6 6 6 5 5 5 5
na UNC na
na
na
na
na
obs na obs
BSY DRDY DF
4 4 4 4 3 3 3 3 2 2 2 2
D1h
4Fh
C2h
D
B0h
4 4 4 4 3 3 3 3 2 2 2 2
IDNF na ABRT
DEV na
na DRQ na
1 1 1 1 0 0 0 0
1 1 1 1 0 0 0 0
na na
na ERR