3X-KZPEA Release Notes, March 2005

SCSI Cabling Considerations for Shared Bus Support with Configuration C
The following cables are supported in this shared bus configuration:
Signal cables between the nodes and the storage shelf:
2-5-2 P/N 6-3 P/N Cable P/N Description
3X-BC56J-02 341174-B21 313374-001 6 foot VHDCI-to-VHDCI
3X-BC56J-03 341175-B21 313374-002 12 foot VHDCI-to-VHDCI
3X-BC56J-04 164604-B21 313374-004 24 foot VHDCI-to-VHDCI
Figure 3 is an example of a Configuration C supported KZPEA shared SCSI bus configuration.
CHA
ID7
J5 in
J3 in
w/White
Plug
Port A Port B
AlphaServer 1
DS25
SCSI Signal Cable SCSI Signal Cable
CHB
ID7
KZPEA
CHA
ID6
J5 in
J3 in
w/White
Plug
AlphaServer 2
DS25
CHB
ID7
KZPEA
MSA 30 MI
Storage Enclosure
Dual Channel
I/O Module
w/2 Ports per
Channel
A1 A2 B1 B2
Figure 3 Configuration C KZPEA, Shared SCSI Bus
Note: Shelf Plugs can be interchanged i.e., A1 and A2 can be reversed if desired.
KZPEA Adapter Configuration for Shared SCSI Bus Installation
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.
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