
26 Barracuda ATA II 100 Family Product Manual, Rev. A
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 trans-
ferred during a Read Multiple
or Write Multiple command
xxxx
H
60–61 Total number of user-addres-
sable LBA sectors available
ST330631A = 59,777,640
ST320424A = 39,851,760
ST315324A = 29,888,820
ST310216A = 19,925,880
62 Retired
0000
H
63 Multiword DMA active and
modes supported (see note
following this table)
xx
07
H
64 Advanced PIO modes sup-
ported (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
Word Description Value
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