12
CHA
ID7
J5 out
J3 in
w/Black
Plug
w/Black
Plug
AlphaServer 1
ES45
SCSI Terminator Cable
Terminator
End
SCSI Signal Cable
CHB
ID7
KZPEA
CHA
ID6
J5 out
J3 in
AlphaServer 2
ES45
CHB
ID7
KZPEA
CHA
Dual Channel
I/O Module
Storage
Enclosure
DS-SL13R-BA
CHB
Tri-link
Figure 2 Configuration B KZPEA, Shared SCSI Bus
KZPEA Adapter Configuration for Shared SCSI Bus Installation of
Configurations A and B
The following steps describe the procedure to disable on-board termination, and also to change one of the
adapter’s SCSI ID to 6.
Refer to the system and KZPEA User’s Guides for proper system shutdown, power off and ESD
protections.
1) Disconnect any attached cables and
remove
the on board termination jumper for the bus being
configured as a shared bus: J3 for Channel 2/B and J5 for Channel 1/A. Refer to the
KZPEA User’s Guide
for location of these termination jumpers.
2) Power-up both AlphaServer systems, and at the console prompts perform the following:
a)
Type "show config" to display the system configuration information.
b)
Determine the name of the KZPEA adapter: e.g. pkc0, pkd0, etc.
c)
Type "init" to reinitialize the system prior to using the “run bios” command.
d)
Type "run bios pkx0" where x is the assigned letter of the board's channel A.
e)
Press CTRL-A when prompted to run the KZPEA on-board configuration utility.
3) Perform the following steps in the configuration utility on both AlphaServer systems:
a)
Select the channel (1/A or 2/B) that will be configured in a shared bus environment.
b)
Select "Configure/View Host Adapter Settings" menu.
c)
Use the arrow key to move the cursor to Host Adapter SCSI Termination, and then press RETURN
to select your options.
d)
Set Host Adapter SCSI Termination = “Low OFF/High OFF” if channel 1/A was selected, or
“Disabled” if channel 2/B was selected. [NOTE: B channel has different settings than A channel]
e)
On one of the shared bus AlphaServer systems, change its KZPEA SCSI ID field to 6 (default is 7)
for the appropriate channel being configured into a shared bus environment.
f)
Press Esc key to get out and save the changes.
g)
Press Esc key again to exit the configuration utility. The console will reset all I/O buses.
