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Word
Description
54
Number of current logical cylinders
55
Number of current logical heads
56
Number of current logical sectors per logical track
57–58
Current capacity in sectors
59
Number of sectors transferred during a Read Multiple or
Write Multiple command
60–61
Total number of user-addressable sectors
This field contains a value that is one greater than the total
number of user-addressable sectors. The maximum value
that shall be placed in this field is 0FFFFFFFh. The
0FFFFFFFh value applies to all capacities over 137Gbytes
(see Section 3.2 and 3.3 for related information).
62
Retired
63
Multiword DMA active and modes supported
(see note following this table)
64
Advanced PIO modes supported (modes 3 and 4 supported)
65
Minimum multiword DMA transfer cycle time per word
(120 ns)
66
Recommended multiword DMA transfer cycle time per word
(120 ns)
67
Minimum PIO cycle time without IORDY flow control (240 ns)
68
Minimum PIO cycle time with IORDY flow control (120 nsec)
69–74
ATA-reserved
75
Queue depth
76
Serial ATA capabilities
77
ATA-reserved
78
Serial ATA features supported
79
Serial ATA features enabled
80
Major version number
81
Minor version number
82
Command sets supported
83
Command sets supported
84
Command sets support extension
85
Command sets enabled
86
Command sets enabled
87
Command sets enable extension
88
Ultra DMA support and current mode
(see note following this table)
Momentus Product Manual, Rev. A
Value
xxxx
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
ST9750422AS
= 0FFFFFFFh
ST9750421AS
= 0FFFFFFFh
ST9750420AS
= 0FFFFFFFh
ST9750420ASG = 0FFFFFFFh
ST9640422AS
= 0FFFFFFFh
ST9640421AS
= 0FFFFFFFh
ST9640420AS
= 0FFFFFFFh
ST9640420ASG = 0FFFFFFFh
ST9500424AS
= 0FFFFFFFh
ST9500423AS
= 0FFFFFFFh
ST9500423ASG = 0FFFFFFFh
0000
H
xx07
H
0003
H
0078
H
0078
H
00F0
H
0078
H
0000
H
0000
H
0508
H
0000
H
0048
H
0040
H
003E
H
0000
H
306B
H
4001
H
4000
H
30xx
H
0001
H
4000
H
xx7F
H
29
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