Maxtor D540X-4K - Manual (Page 81)

ATA Bus Interface and ATA Commands
Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT 6-19
Status flag
• Bit 0 -Pre-failure/advisory - If the value of this bit equals zero, an
attribute value less than or equal to its corresponding attribute threshold
indicates an advisory condition where the usage or age of the device has
exceeded its intended design life period. If the value of this bit equals
one, an attribute value less than or equal to its corresponding attribute
threshold indicates a pre-failure condition where imminent loss of data
is being predicted.
• Bit 1 Reserved for future use.
• Bits 3 - 6 - Vendor specific.
• Bits 7 - 15 - Reserved for future use.
The range and meaning of the attribute values is described in Table 6-13. Prior to the
monitoring and saving of attribute values, all values are set to 0x64h. The attribute
values of 0x00h and 0xFFh are reserved and should not be used by the device.
SMART capability
• Bit 0 - Pre-power mode attribute saving capability - If the value of this
bit equals one, the device will save its attribute values prior to going into
a power saving mode (Idle, Standby or Sleep modes).
• Bit 1 - Attribute autosave after event capability - If the value of this bit
is equal to one, the device supports the SMART ENABLE/DISABLE
ATTRIBUTE AUTOSAVE command.
• Bits 2-15 - Reserved for future use.
The data structure checksum is the two’s compliment of the result of a simple eight-
bit addition of the first 511 bytes in the data structure.
 5/#46 4'6740 56#675
COMMAND CODE - B0h
TYPE - Optional - SMART Feature set. If the SMART feature set is implemented,
this command shall be implemented.
PROTOCOL - Non-data command.
INPUTS - The Features register shall be set to DAh. The Cylinder Low register shall
be set to 4Fh. The Cylinder High register shall be set to C2h.
4GIKUVGT        
Features DAh
Sector Count
Sector Number
Cylinder Low 4Fh