IBM DDRS-39130 Hard Drive Specifications - Page 42

Jumper Signal Description

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6.2.1 Jumper Signal Description Throughout this paragraph ON means a shunt jumper is installed and O F F means that no shunt jumper is installed. 6.2.1.1 Device address select lines. (-DAS0, -DAS1, -DAS2, -DAS3) These four lines defines DDRS-3xxxx device ID on the SCSI BUS. -DAS0 is the least significant bit and -DAS3 is the most significant bit. Device ID is defined as follows. DAS3 DAS2 DAS1 DAS0 Position # > (1) (2) (3) (4) Device ID off off off off off off off on off off on off off off on on off on off off off on off on off on on off off on on on on off off off on off off on on off on off on off on on on on off off on on off on on on on off on on on on 0< 1 2 3 4 5 6< 7 8 9 10 11 12 13 14 15 Shipping default of 80 pin Shipping default of 50 pin/68 pin Note: 50 pin model does not use DAS3, and only Device ID's 0 through 7 can be assigned. Figure 23. SCSI Device ID | 6.2.1.2 Position 5 on 50/68-pin models (Enable Auto Spin up) | If a shunt jumper is installed, the drive will spin up automatically after power on reset. If shunt jumper is | not installed, the drive will not spin up unless a START UNIT command is received. | Note: The drive may not spin up while SCSI Bus is disconnected and internal terminator is disabled. | 6.2.1.3 Position 5 on 80-pin models (Disable Auto Spin up) | If shunt jumper is not installed, the drive will spin up automatically after power on reset. If a shunt jumper | is installed, the drive will not spin up unless a START UNIT command is received. | 6.2.1.4 Position 6 on SE models (SCSI Terminator ON) If a shunt jumper is installed on 50/68-pin drive, the internal terminator on the drive works. 80-pin drive has not internal terminator. | 6.2.1.5 Position 6 on LVD models (Force SCSI Single-End Mode) | If a shunt jumper is installed, the drive is forced to work as Single-End mode drive. 32 OEM Spec. of DDRS-3xxxx

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6.2.1
Jumper Signal Description
Throughout this paragraph ON means a shunt jumper is installed and OFF means that no shunt jumper is
installed.
6.2.1.1
Device address select lines. (-DAS0, -DAS1, -DAS2, -DAS3)
These four lines defines DDRS-3xxxx device ID on the SCSI BUS.
-DAS0 is the least significant bit and
-DAS3 is the most significant bit. Device ID is defined as follows.
DAS3
DAS2
DAS1
DAS0
Position #
>
(1)
(2)
(3)
(4)
Device ID
off
off
off
off
0
<
Shipping
off
off
off
on
1
default
off
off
on
off
2
of
off
off
on
on
3
80 pin
off
on
off
off
4
off
on
off
on
5
off
on
on
off
6
<
Shipping
off
on
on
on
7
default
on
off
off
off
8
of
on
off
off
on
9
50 pin/68 pin
on
off
on
off
10
on
off
on
on
11
on
on
off
off
12
on
on
off
on
13
on
on
on
off
14
on
on
on
on
15
Note: 50 pin model does not use
DAS3, and only Device ID's 0 through 7
can be assigned.
Figure 23. SCSI Device ID
|
6.2.1.2
Position 5 on 50/68-pin models (Enable Auto Spin up)
|
If a shunt jumper is installed, the drive will spin up automatically after power on reset. If shunt jumper is
|
not installed, the drive will not spin up unless a START UNIT command is received.
|
Note:
The drive may not spin up while SCSI Bus is disconnected and internal terminator is disabled.
|
6.2.1.3
Position 5 on 80-pin models (Disable Auto Spin up)
|
If shunt jumper is not installed, the drive will spin up automatically after power on reset. If a shunt jumper
|
is installed, the drive will not spin up unless a START UNIT command is received.
|
6.2.1.4
Position 6 on SE models (SCSI Terminator ON)
If a shunt jumper is installed on 50/68-pin drive, the internal terminator on the drive works.
80-pin drive has not internal terminator.
|
6.2.1.5
Position 6 on LVD models (Force SCSI Single-End Mode)
|
If a shunt jumper is installed, the drive is forced to work as Single-End mode drive.
32
OEM Spec. of DDRS-3xxxx