Product data
Examples of Single-Bus Mode Configurations
For a single-bus mode configuration, the SCSI Bus Split switch on the switch card
assembly of a 2104 Model DU3 or TU3 must be set to Off.
Each 2104 can be connected either to one external SCSI connector of a SCSI adapter,
or to an integrated SCSI port that is in the using system. If the adapter has four
external SCSI connectors, up to four 2104s can be connected to it.
For High Availability Cluster Multi-Processing (HACMP) configurations, the SCSI
interface card assemblies of the 2104 must be connected each to a separate adapter
via an external SCSI connector of the appropriate adapter. The adapters must be a PCI
Dual-Channel Ultra2 SCSI Adapter (Type 4-R, feature 6205). They must each be in a
separate using system.
For non-HACMP configurations, the SCSI interface card assemblies of the 2104 must
be connected each to a separate adapter via an external SCSI connector of the
appropriate adapter, or to an Ultra2 SCSI integrated port that is in the using system.
The adapters must be PCI Dual Channel Ultra2 SCSI Adapters type 4-R, feature code
6205. They can be in the same using system or in separate using systems. They must
not, however, share access to the disk drive modules that are in the 2104.
144 2104 Service Guide
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