Seagate ST34321A Product Manual - Page 33

Identify Drive command - jumper settings

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Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B 25 The following commands contain drive-specific features that may not be described in the Draft ATA-4 Standard. 3.2.2 Identify Drive command The Identify Drive command (command code ECH) transfers information about the drive to the host following power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table below. All reserved bits or words should be set to zero. Parameters listed with an "x" are drive-specific or vary with the state of the drive. See Section 1 of this manual for default parameter settings. Note. If the alternate capacity jumper is installed on these drives, the drive capacity is reduced in word 1 to 4,092 cylinders. Word 0 Description Configuration information: • Bit 15: 0 = ATA; 1 = ATAPI • Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved Number of logical cylinders: 16,383 (ST38641A) 1 13,446 (ST36531A) 8,894 (ST34321A) 6,253 (ST33221A) 4,092 (ST32110A) 2 ATA-reserved Number of logical heads: 3 15 (ST36531A, ST34321A) 16 (ST38641A, ST33221A, ST32110A) 4 Retired continued Contents 0C5AH 3FFFH (ST38641A) 3486H (ST36531A) 22BEH (ST34321A) 186DH (ST33221A) 0FFCH (ST32110A) 0000H 000FH (ST36531A) (ST34321A) 0010H (ST38641A) (ST33221A) (ST32110A) 0000H

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The following commands contain drive-specific features that may not be
described in the
Draft ATA-4 Standard
.
3.2.2
Identify Drive command
The Identify Drive command (command code EC
H
) transfers information
about the drive to the host following power up. The data is organized as
a single 512-byte block of data, whose contents are shown in the table
below. All reserved bits or words should be set to zero. Parameters listed
with an “x” are drive-specific or vary with the state of the drive. See
Section 1 of this manual for default parameter settings.
Note.
If the alternate capacity jumper is installed on these drives,
the drive
capacity is reduced in word 1 to 4,092 cylinders.
Word
Description
Contents
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 (ST38641A)
13,446 (ST36531A)
8,894
(ST34321A)
6,253
(ST33221A)
4,092
(ST32110A)
3FFF
H
(ST38641A)
3486
H
(ST36531A)
22BE
H
(ST34321A)
186D
H
(ST33221A)
0FFC
H
(ST32110A)
2
ATA-reserved
0000
H
3
Number of logical heads:
15
(ST36531A, ST34321A)
16
(ST38641A, ST33221A,
ST32110A)
000F
H
(ST36531A)
(ST34321A)
0010
H
(ST38641A)
(ST33221A)
(ST32110A)
4
Retired
0000
H
continued
Medalist 8641, 6531, 4321, 3221 and 2110, Rev. B
25