Seagate BARRACUDA XT ST33000651AS User Manual
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Barracuda XT SATA Product Manual, Rev. D
SATA Interface
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be dis-
abled
2F00
H
50
ATA-reserved
0000
H
51
PIO data-transfer cycle timing mode
0200
H
52
Retired
0200
H
53
Words 54–58, 64–70 and 88 are valid
0007
H
54
Number of current logical cylinders
xxxx
H
55
Number of current logical heads
xxxx
H
56
Number of current logical sectors per logical track
xxxx
H
57–58
Current capacity in sectors
xxxx
H
59
Number of sectors transferred during a Read Multiple
or Write Multiple command
xxxx
H
60–61
Total number of user-addressable LBA sectors available
(see Section 2.1 for related information)
*Note: The maximum value allowed in this field is:
0FFFFFFFh (268,435,455 sectors, 137Gb). Drives with
capacities over 137Gb will have 0FFFFFFFh in this field and
the actual number of user-addressable LBAs specified in
words 100-103. This is required for drives that support the
48-bit addressing feature.
0FFFFFFFh*
62
Retired
0000
H
63
Multiword DMA active and modes supported
(see note following this table)
xx07
H
64
Advanced PIO modes supported (modes 3 and 4 sup-
ported)
0003
H
65
Minimum multiword DMA transfer cycle time per word (120
nsec)
0078
H
66
Recommended multiword DMA transfer cycle time per
word
(120 nsec)
0078
H
67
Minimum PIO cycle time without IORDY flow control (240
nsec)
00F0
H
68
Minimum PIO cycle time with IORDY flow control (120 nsec)
0078
H
69–74
ATA-reserved
0000
H
75
Queue depth
001F
H
76
Serial ATA capabilities
xxxx
H
77
Reserved for future Serial ATA definition
xxxx
H
78
Serial ATA features supported
xxxx
H
79
Serial ATA features enabled
xxxx
H
Word
Description
Value