SCSI IDs
Each SCSI device on your system will have its own unique
ID. This is a number from 1-15. Your SCSI adapter has an ID of 7 by default. The
ID's are set by jumpers on the front or back of your drive. It's on the back for
all the 5 1/4 based drives. For Hard drives, it can be on the front or the back
of the drive. Take a look at the back of this SCSI CD-ROM drive to see how the
ID's are set:
The Label ID settings are where you set the ID. The
jumpers are put on vertically. To set an ID follow this chart.
|
SCSI ID Number |
Pin 1 |
Pin 2 |
Pin 3 |
|
0 |
Off |
Off |
Off |
|
1 |
ON |
Off |
Off |
|
2 |
Off |
ON |
Off |
|
3 |
ON |
ON |
Off |
|
4 |
Off |
Off |
ON |
|
5 |
ON |
Off |
ON |
|
6 |
Off |
ON |
ON |
|
7 |
ON |
ON |
ON |
This holds true for most SCSI devices, when in doubt, read
the manual or look at the top of the drive. 99% of the drives on the market have
a little chart showing ID's.
In this case, the fourth and sixth pins are factory one's
which doesn't do anything.
Also note that the drive has a termination setting. Most
drives do except for LVD ones. Putting a vertical jumper on those pins would
turn termination on.
You would do this if this is the last drive on your cable.
The white connector is your standard audio cable. Notice the 50 pin connector.
This connector is very similar to those of IDE drives (except for the extra 10
pins). The cable that attaches to this drive has a red stripe indicating Pin 1.
In most cases Pin 1 is by the four pin power connector.
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