Seagate ST4000VM000 manual XxxxH

Serial ATA Interface			www.seagate.com
Table 8	Identify Device commands (continued)
Word		Description	Value
47		(Bits 7–0) Maximum sectors per interrupt on Read multiple and	8010H
		Write multiple (16)
48		Reserved	0000H
49		Standard Standby timer, IORDY supported and may be disabled	2F00H
50		ATA-reserved	4000H
51		PIO data-transfer cycle timing mode	0200H
52		Retired	0200H
53		Words 54–58, 64–70 and 88 are valid	0007H
54		Number of current logical cylinders	xxxxH
55		Number of current logical heads	xxxxH
56		Number of current logical sectors per logical track	xxxxH
57–58		Current capacity in sectors	xxxxH
59		Number of sectors transferred during a Read Multiple	xxxxH
		or Write Multiple command
60–61		Total number of user-addressable LBA sectors available	0FFFFFFFh*
		(see Section 2.2 for related information)
		*Note: The maximum value allowed in this field is: 0FFFFFFFh
		(268,435,455 sectors, 137 Gbytes). Drives with capacities over
		137 Gbytes will have 0FFFFFFFh in this field and the actual num-
		ber of user-addressable LBAs specified in words 100-103. This is
		required for drives that support the 48-bit addressing feature.
62		Retired	0000H
63		Multiword DMA active and modes supported	xx07H
		(see note following this table)
64		Advanced PIO modes supported (modes 3 and 4 supported)	0003H
65		Minimum multiword DMA transfer cycle time per word (120 nsec)	0078H
66		Recommended multiword DMA transfer cycle time per word	0078H
		(120 nsec)
67		Minimum PIO cycle time without IORDY flow control (240 nsec)	0078H
68		Minimum PIO cycle time with IORDY flow control (120 nsec)	0078H
69–74		ATA-reserved	0000H
75		Queue depth	001FH
76		Serial ATA capabilities	xxxxH
77		Reserved for future Serial ATA definition	xxxxH
78		Serial ATA features supported	xxxxH
79		Serial ATA features enabled	xxxxH
80		Major version number	01F0H

34 Video 3.5 HDD Product Manual, Rev. H