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34 p5-570 Technical Overview and Introduction
Figure 2-11 Conceptual diagram of the 7311-D20 I/O drawer
7311 Model D20 internal SCSI cabling
A 7311 Model D20 supports hot-swappable disks using two 6-pack disk bays for a total of 12
disks. Additionally, the SCSI cables (FC 4257) are used to connect a SCSI adapter (any of
various features) in slot 7 to each of the 6-packs, or two SCSI adapters, one in slot 4 and one
in slot 7. (See Figure 2-12 on page 34.)
Figure 2-12 7311 Model D20 internal SCSI cabling
2.7.4 7311 I/O drawer and RIO-2 cabling
As described in 2.7, “External I/O subsystems” on page 32, we can connect up to four I/O
drawers in the same loop, and up to 20 I/O drawers to the p5-570 system.
Note: Any 6-packs and the related SCSI adapter can be assigned to a partition. If one
SCSI adapter is connected to both 6-packs, then both 6-packs can be assigned only to the
same partition.
RIO 2
133 MHz,
64-bit PCI-X
PCI-X Bridge
1
3
PCI-X Host
Bridge
2
133 MHz, 64-bit PCI-X
4
6
4
/
1
3
3
6
4
/
1
3
3
6
4
/
1
3
3
6
4
/
1
3
3
PCI-X Bridge
5
6
7
6
4
/
1
3
3
6
4
/
1
3
3
6
4
/
1
3
3
Connect the SCSI cable feature to the SCSI adapter
in rightmost slot (7) as shown below:
to 6-pack
backplanes
to 6-pack
backplanes
If a SCSI card is also placed in slot 4, wire as shown below:
SCSI cables FC 4257 SCSI cables FC 4257