Appendix B. Cable Configurations; Valid Configurations - IBM 2104 Model DS4 Installation Manual

Appendix B. Cable configurations

This appendix shows examples of cable configurations for the 2104 Model DS4.
Some of the configurations are valid for all the adapters that the 2104 Model DS4
or Model TS4 supports. Other configurations are valid only for particular types of
adapters. Also shown are configurations that are invalid. Do not use any
configuration that is shown as invalid; unexpected results might occur.

Valid configurations

Only point-to-point connections are allowed between the SCSI interface cards in a
2104 Model DS4 and the SCSI adapter card or integrated SCSI port in a host
system.
A 2104 Model DS4 with only one SCSI interface card can be attached to one SCSI
adapter or integrated SCSI port. A 2104 Model DS4 with two SCSI interface cards
can be attached to two SCSI adapters or integrated SCSI ports.
When you use an internal connector on the adapter card, do not use the
corresponding external connector to connect to a 2104 Model DS4.
A 2104 Model DS4 can be configured to support either a single SCSI bus or a dual
SCSI bus. The setting of the SCSI bus split switch on the card in the 2104 Model
DS4 defines which configuration is to be used.
An RS/6000 or IBM Eserver pSeries computer uses one of the following SCSI
adapters to connect to the 2104 Model DS4:
v PCI Dual-Channel Ultra3 SCSI adapter (type number 4-Y, feature code 6203)
v PCI 4-Channel Ultra3 SCSI RAID Adapter (type number 4-X, feature code 2498)
v PCI-X Dual Channel Ultra320 SCSI adapter (type number 5702, feature code
v PCI-X Dual Channel Ultra320 SCSI RAID Adapter (type number 5703, feature
© Copyright IBM Corp. 2003
This dual-channel adapter has two external SCSI connectors and two internal
SCSI connectors. Each pair, consisting of one external and one internal
connector, is connected to a separate SCSI channel.
This 4-channel adapter has four external SCSI connectors and two internal SCSI
connectors. The Channel 1 and Channel 2 external connectors share the same
SCSI bus as the corresponding Channel 1 and Channel 2 internal connectors.
The Channel 3 and Channel 4 external connectors have their own non-shared
SCSI bus.
5712)
This dual-channel adapter has two external SCSI connectors and two internal
SCSI connectors. Each pair, consisting of one external and one internal
connector, is connected to a separate SCSI channel.
code 5703)
This dual channel adapter has two Ultra320 SCSI busses, each with one internal
and one external connector.
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