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U Series CE Family Product Manual, Rev. A 25
Word Description Value
0 Configuration information:
•
Bit 15: 0 = ATA; 1 = ATAPI
•
Bit 7: removable media
•
Bit 6: removable controller
•
Bit 0: reserved
0C5A
H
1 Number of logical cylinders
16,383
2 ATA-reserved 0000
H
3 Number of logical heads
16
4 Retired 0000
H
5 Retired 0000
H
6 Number of logical sectors per
logical track: 63 003F
H
7–9 Retired 0000
H
10–19 Serial number: (20 ASCII
characters, 0000
H
= none) ASCII
20 Retired 0000
H
21 Retired 0400
H
22 Obsolete 0004
H
23–26 Firmware revision (8 ASCII
character string, padded with
blanks to end of string)
x.xx
27–46 Drive model number: (40
ASCII characters, padded
with blanks to end of string)
ST380020ACE
ST360020ACE
ST340810ACE
ST320410ACE
47 Maximum sectors per inter-
rupt on Read multiple and
Write multiple (32)
8020
H
48 Reserved 0000
H
49 Standard Standby timer,
IORDY supported and may
be disabled
2F00
H