ATA Bus Interface and ATA Commands
6-42 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
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.
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.
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.
Register
Register
Register
Register
7
77
7
6
66
6
5
55
5
4
44
4
3
33
3
2
22
2
1
11
1
0
00
0
Features
D1h
Sector Count
Sector Number
Cylinder Low
4Fh
Cylinder High
C2h
Device/Head
1
1
D
Command
B0h
Register
Register
Register
Register
7
77
7
6
66
6
5
55
5
4
44
4
3
33
3
2
22
2
1
11
1
0
00
0
Error
na
UNC
na
IDNF
na
ABRT
na
na
Sector Count
na
Sector Number
na
Cylinder Low
na
Cylinder High
na
Device/Head
obs
na
obs
DEV
na
Status
BSY
DRDY
DF
na
DRQ
na
na
ERR
Summary of Contents for FIREBALL PLUS AS 10.2
Page 12: ...About This Manual 1 4 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 16: ...General Description 2 8 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 61: ...Basic Principles of Operation Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT 5 16 ...
Page 62: ...Basic Principles of Operation 5 17 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...
Page 162: ...Index I 4 Quantum Fireball Plus AS 10 2 20 5 30 0 40 0 60 0 GB AT ...