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26 U4 Family Product Manual, Rev. D
27–46 Drive model number: (40 ASCII char-
acters, padded with blanks to end of
string)
ST32112A
ST34311A
ST36421A
ST38421A
47 (Bits 7–0) Maximum sectors per inter-
rupt on Read multiple and Write mul-
tiple (16)
8010
H
48 Reserved
0000
H
49 Standard Standby timer, IORDY
supported and may be disabled
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:
ST32112A = 4,225,536
ST34311A = 8,452,080
ST36421A = 12,596,850
ST38421A = 16,498,944
7A00
H
0040
H
(ST32112A)
F7F0
H
0080
H
(ST34311A)
3672
H
00C0
H
(ST36421A)
C100
H
00FB
H
(ST38421A)
62 Retired
0000
H
Word Description Value