Scsi Address; Active Termination; Terminator Power Source Selection - Seagate MEDALIST 1080SL Product Manual

22 Medalist 1080sl SCSI Product Manual, August 1995
The jumper block accepts 2-mm jumpers. Spare jumpers are included
with the drive attached to the pins shown in Figure 4 on page 20. If you
need additional jumpers, use the jumpers listed below or equivalent.
Manufacturer
Seagate
Du Pont
Methode

2.6.1 SCSI address

The SCSI ID address is set using pins 1 and 2, 3 and 4, and 5 and 6 on
the options jumper block. The drive is shipped configured with jumpers
on pins 3 and 4 and pins 5 and 6. This makes the default SCSI ID 3. To
configure the drive for a different address, consult the chart in Figure 4.
Refer to your host adapter reference manual for its preferred addressing
scheme.

2.6.2 Active Termination

The ST51080N uses the options jumper block to configure the active
termination. Active termination is enabled when no jumper is connected
to pins 19 and 20 of the options jumper block. To disable active termina-
tion, place a jumper on pins 19 and 20 of the options jumper block. You
can order the drive with the active termination enabled or disabled.
Note. If the active terminators are disabled, termination power must still
be supplied using one of the methods described in Section 2.6.3.

2.6.3 Terminator power source selection

To select the termination power source, install jumpers as follows:
To select the drive power connector as the termination power source
for the terminator packs, install a jumper on pins 23 and 24 of the
options jumper block.
To select the SCSI bus as the termination power source for the
terminator packs, install a jumper on pins 21 and 23 of the options
jumper block.
To provide terminator power to the SCSI bus and the drive terminator
packs, install jumpers on pins 21 and 23 and pins 22 and 24 of the
options jumper block. This is the default.
To provide terminator power to the SCSI bus from the drive power
Part number
13211-001
89133-001
8618-202-70