Jumper Signal Description - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

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.
P o s i t i o n #
N o t e : 5 0 p i n m o d e l d o e s n o t u s e
c a n b e a s s i g n e d .
Figure 23. SCSI Device I D
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
O E M Spec. of DDRS-3xxxx
D A S 3 D A S 2 D A S 1
> ( 1 ) ( 2 ) ( 3 )
o f f o f f o f f
o f f o f f o f f
o f f o f f o n
o f f o f f o n
o f f o n o f f
o f f o n o f f
o f f o n o n
o f f o n o n
o n o f f o f f
o n o f f o f f
o n o f f o n
o n o f f o n
o n o n o f f
o n o n o f f
o n o n o n
o n o n o n
D A S 0
( 4 ) D e v i c e I D
o f f
o n
o f f
o n
o f f
o n
o f f
o n
o f f
o n
o f f
o n
o f f
o n
o f f
o n
D A S 3 , a n d o n l y D e v i c e I D ' s 0 t h r o u g h 7
0 < S h i p p i n g
1 d e f a u l t
2 o f
3 8 0 p i n
4
5
6 < S h i p p i n g
7 d e f a u l t
8 o f
9 5 0 p i n / 6 8 p i n
1 0
1 1
1 2
1 3
1 4
1 5