IBM 2104 Model DU3 - Manual (Page 73)

One Dual-Channel Non-RAID Adapter in One Using System Connected
to Two 2104s and Internal Disk Drives
1 SCSI interface card
2 PCI Dual-Channel Ultra2 SCSI Adapter (type 4-R, feature 6205) or PCI
Dual-Channel Ultra3 SCSI Adapter (type 4-Y, feature 6203). This configuration is not
valid on this adapter because two internal and two external attachments that are on
the same SCSI bus exceed the capacity of the adapter.
3 Internal disk drives.
Using System
2104 Subsystem
1 1
1 1
2104 Subsystem
2
3 3
X
Figure 42. One Dual-Channel Non-RAID Adapter in One Using System Connected to Two
2104s and Internal Disk Drives. This configuration is not valid.
Appendix A. Operating with RISC Systems 57