Specifications
Field
Service
Handbook
for
SGI
Configurations
..
SCSI
Addressing
The following table shows the typical drive
IDS
used for addressing
SCSI
devices
on
SGI
systems. Use
as
a
guide when addressing
SCSI
devices
or
determining drive
ID for
installed devices.
Driw
ID
Device
Comments
1
Disk The system disk drive (foot drive)
is
always drive ID
1
2
Disk of tape Alternative drive ID
for
tape drives
which
typically use drive ID
7
3
Disk Optional disk drive
4
Disk Optional disk drive
5
Disk Optional disk drive
~~ ~~ ~~~~~ ~ ~~~ ~
6
CD-ROM CD-ROM typically uses drive ID
6;
other
drive IDS
can
be used
7
Tape
Tape
drives typically use
drive
ID
7;
drive
ID
2
is
alternative address
Note:
Drive
ID
0
is
reserved
for
the
SCSI
controller.
Jumper Sdngs
for
Disk
Drives
For
Crimson
systems,
set
jumpers
so
that
Parity
is
enabled.
Spindle
motor
starts
on
command.
SCSI
bus
is
tcnninated
on
last
drive.
See
information
on
individual drive
for
locations
of
appropriate
jumpers.
Identifying Disk
Orlves
Use
the
fx
utility
to
identify the manufacturer and manufacturer’s model
of
disk
drives installed in the system. For information about using
fx
to
identify
disk
drives.
see
Section
3,
page
3-23.
(D
Great
Eastern
Technology
11/90
2
-
37