Seagate 3240, 2531 manual Identify Drive command, Word Description Contents

Medalist 3240 and Medalist 2531 Product Manual, Rev. A 25

The following commands contain drive-specific features that may not be described in the Draft Proposed ATA-3 Standard.

3.2.2Identify Drive command

The Identify Drive command (command code ECH) transfers information about the drive to the host following power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table below. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or vary with the state of the drive. See Section 1 of this manual for default parameter settings for the Medalist 3240 and the Medalist 2531.

Note. If the alternate capacity jumper is installed on the ST33240A or ST32531A, the drive capacity is reduced in Word 1 to 4,092 cylinders.

Word	Description	Contents
	Configuration information:
	∙ Bit 10: disc transfer > 10 Mbits/sec
0	∙ Bit 6: fixed drive	0C5AH
	∙ Bit 4: head switch time > 15 μsec
	∙ Bit 3: not MFM encoded
	∙ Bit 1: hard-sectored disc
	Number of fixed cylinders	186DH
		(ST33240A)
1	(default logical emulation): 6,253 (ST33240A)	135CH
	4,956 (ST32531A)	(ST32531A)
2	ATA-reserved	0000H
3	Number of heads (default logical emulation): 16	0010H
4	Number of unformatted bytes per track	0000H
	(not used)
5	Number of unformatted bytes per sector	0000H
	(not used)
6	Number of sectors per track	003FH
	(default logical emulation): 63
7–9	ATA-reserved	0000H
10–19	Serial number:	ASCII
	(20 ASCII characters, 0000H = none)

continued