HP DDS DRIVES USER GUIDE
7
Pin State
Effect
Unconnected
This is the default. Data compression
is controlled by configuration switches
1 and 2 (on the underside of the drive)
and through the SCSI MODE
SELECT command.
Connected to 0V
Data compression is disabled. The
setting of configuration switch 1 is
ignored. Switch 2 is valid. However,
data compression can still be controlled
through MODE SELECT. Note that
when reading, the drive will always
decompress compressed data.
It follows from this that if you wish to
use this pin, you should set
configuration switch 1 on the
underside of the drive to ON.
Terminator Power
The drive will provide termination power for the SCSI
termination resistors if a jumper is set across the two pins marked
“Term power” as shown in the diagram.
Configuration switches
There is a set of configuration switches on the underside of the
drive, shown overleaf:
With the drive switched off, use the information below to select
the correct configuration for your system.
ON
1
2
3
4
5
6
7
8
On On
Off On On On On On
