Sun Microsystems Sun Workstation 100U System Manager's Manual page 32

Sun 100/150 Installation Manual
Subsystem Set-Up
left alone: SW3 should have section 3
OFF
and all others
ON;
and SW2 should be properly set
for your SMD controller type. If you have a Xylogics 450 SMD Disk Controller, SW2 should
have all sections ON; if you have an Interphase 2180 SMD Disk Controller, SW2 should have
sections 2, 4, 5, and 7
ON
and all others
OFF.
The Fujitsu subsystem is very simple to operate; it has only a power cord and an on-off switch.
However, we suggest that you take some time to look through the installation and operation
sections of the Fujitsu manual before using the drive, to understand general operating require-
ments and precautions.
3.1.1. M2312K (Fujitsu 84-MByte) Disk Expansion
If you are adding a second drive to your system, a bit of configuration work is necessary. Basi-
cally, you have to do the following:
CAUTION:
Turn off the power and disconnect the power cord before opening up the Sun
Workstation's enclosure, doing cabling of any sort, or altering peripheral/board configurations.
1. Remove the four terminator packs from your expansion drive. The terminator packs are
required only on the
lad
disk drive in a daisy-chain configuration. If you ordered your
expansion drive from Sun, the terminator packs should already have been removed when
you receive the drive.
The terminator packs are located on the drive circuit board inside the chrome chassis. To
get to them, unscrew the two Phillips screws on the chrome cover (at the rear of the drive),
and lift off the cover. The four terminator packs are the chips just behind the 60-pin com-
mand cable connector.
2.
Set the new drive's logicai address to unit number
1:
set sections
1
and
4
on switch
SWI
to ON, and leave the other sections OFF. To do this, you need to remove the outer (white
metal) and inner covers of the subsystem housing: SWI is accessible at the top of the drive
itself. The other switches, SW2 and SW3, should be left as set originally; see the previous
section for proper settings.
3. Daisy chain the drives together using the special cable which comes with the expansion
drive. The cable has several female connectors along it (which connect to the disk com-
mand cables), and
end~
in a single male connector (which connects to the workstation back-
panel). Connect each disk's command cable to one of the female connectors along the
expansion cable, making sure that the drive with the terminator packs is the last drive in
the chain. Then connect the male end of the expansion cable to the
'DISK COMMAND'
con-
nector on the Sun backpanel.
4. Plug the 25-pin data cable for drive unit #0 into the
'DISK DATA
#0' connector on the Sun
backpanel, and the data cable for drive unit #1 (your expansion drive, if you followed
these procedures) into
'DISK DATA
#1 '.
No changes to the Xylogics 450 Disk Controller Board are necessary.
Before you mount and/or power up the drive, make sure you have followed the directions for
unlocking the heads given in the previous section.
Revision H of 12 March 1984 3-3