IBM DTLA-307075 Hard Drive Specifications - Page 55

logical head default

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7.3.2.2 15 logical head default The positions of jumper blocks shown below is used to select Device 0, Device 1, Cable Selection, or Device 0 Forcing Device 1 Present, setting 15 logical heads instead of default 16 logical head models. IGECA HFDB DEVICE 0 (Master) IGECA HFDB DEVICE 1 (Slave) IGECA HFDB CABLE SEL IGECA HFDB DEVICE 0 FORCING DEVICE 1 PRESENT Figure 45. Jumper positions for 15 logical head default Notes: 1. To enable the CSEL mode (Cable Selection mode) the jumper block must be installed at E-F. In the CSEL mode, the drive address is determined by AT interface signal #28 CSEL as follows: Ÿ When CSEL is grounded or at a low level, the drive address is 0 (Device0). Ÿ When CSEL is open or at a high level, the drive address is 1 (Device1). 2. In CSEL mode, installing or removing the jumper blocks at A-C or B-D position does not affect any selection of Device or Cable Selection mode. Deskstar 40GV & 75GXP hard disk drive specifications 43

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7.3.2.2
15 logical head default
The positions of jumper blocks shown below is used to select Device 0, Device 1, Cable Selection, or
Device 0 Forcing Device 1 Present, setting 15 logical heads instead of default 16 logical head models.
G
I
E
C
A
H
F
D
B
DEVICE 0
(Master)
G
I
E
C
A
H
F
D
B
DEVICE 1
(Slave)
G
I
E
C
A
H
F
D
B
CABLE SEL
G
I
E
C
A
H
F
D
B
DEVICE 0 FORCING
DEVICE 1 PRESENT
Figure 45. Jumper positions for 15 logical head default
Notes:
1.
To enable the CSEL mode (Cable Selection mode) the jumper block must be installed at E-F. In the
CSEL mode, the drive address is determined by AT interface signal #28 CSEL as follows:
°
When CSEL is grounded or at a low level, the drive address is 0 (Device0).
°
When CSEL is open or at a high level, the drive address is 1 (Device1).
2.
In CSEL mode, installing or removing the jumper blocks at A-C or B-D position does not affect any
selection of Device or Cable Selection mode.
Deskstar 40GV & 75GXP hard disk drive specifications
43