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44 IBM System p5 520 and 520Q Technical Overview and Introduction
Figure 2-11 7311 Model D20 internal SCSI cabling
2.8.2 7311 I/O drawer RIO-2 cabling
As described in 2.8, “External I/O subsystem” on page 43, you can connect up to four I/O
drawers in the same loop to the p5-520 or p5-520Q system. Each RIO-2 port can operate at
1 GHz in bidirectional mode and is capable of passing data in each direction on each cycle of
the port. Therefore, the maximum data rate is 4 GBps per I/O drawer in double barrel mode.
There is one default primary RIO-2 loop in any p5-520 or p5-520Q system. This feature
provides two Remote I/O ports for attaching up to four 7311 Model D20 I/O drawers to the
system in a single loop.
Figure shows how you could connect four I/O drawers to one 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, both 6-packs can be assigned only to the
same partition. When the server is configured with the Advanced POWER Virtualization
hardware feature and the Virtual I/O Server is used for virtual SCSI, the disks can be
shared between partitions.
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