Maxtor D540X-4K manual $VGUQTOCV 2 binary

ATA Bus Interface and ATA Commands

Cylinder High	na
Device/Head	obs	na	obs	DEV	na
Status	BSY	DRDY	DF	na	DRQ	na	na	ERR

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 6.5.12.2).

The data structure revision number shall be the same value used in the device attribute values data structure.

Table 6-11defines the twelve bytes that make up the information for each threshold entry in the device attribute thresholds data structure. Attribute entries in the individual threshold data structure must be in the same order and correspond to the entries in the individual attribute data structure.

The attribute ID numbers are vendor specific. Any non-zero value in the attribute ID number indicates an active attribute.

Attribute threshold values are to be set at the factory and are not changeable in the field.

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.

	Device Attribute Thresholds Data Structure
	6CDNG￿￿￿￿￿￿￿
	Total bytes		512
	Data structure&GUETKRVKQPrevision number =		$[VGU(QTOCV2binary	6[RG
				Rd only
	0x0004h for this revision
	1st attribute threshold	12		Rd only
.....
.....
.....
	30th attribute threshold	12		Rd only
	reserved (0x00)	18		Rd only
	Vendor specific	131		Rd only
	Data structure checksum	1		Rd only
	Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT				-17