6 external disk subsystems, Ibm 2104 expandable storage plus – IBM P5 570 User Manual
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p5-570 Technical Overview and Introduction
the p5-570 system. If you have more than one I/O drawer, you continue the loop, connecting
the next drawer (or drawers) with the same rule.
Figure 2-14 SPCN cabling examples
There are different SPCN cables to satisfy different length requirements:
SPCN cable drawer-to-drawer, 2 m (FC 6001)
SPCN cable drawer-to-drawer, 3 m (FC 6006)
SPCN cable rack-to-rack, 6 m (FC 6008)
SPCN cable rack-to-rack, 15 m (FC 6007)
2.7.6 External disk subsystems
The p5-570 system has internal hot-swappable drives. Internal disks are usually used for the
AIX rootvg and paging space. The two 3-pack backplanes can be split when the SCSI RAID
Enablement Card is not part of the p5-570 configuration. Additional customer requirements
can be satisfied with any of several external disk options that the p5-570 supports.
IBM 2104 Expandable Storage Plus
The IBM 2104 Expandable Storage Plus Model DS4 is a low-cost 3U disk subsystem that
supports up to 14 Ultra320 SCSI disks from 18.2 GB to 146.8 GB at time of writing. This
subsystem could be used in splitbus mode, which means that the bus with 14 disks could be
split into two buses with seven disks each. In this configuration, two additional LPARs could
be provided with up to seven disks by using one Ultra3 SCSI adapter (FC 6203) for each
LPAR. If RAID is required, one Ultra3 SCSI RAID adapter (FC 5703) can be used for each
LPAR.
For more information about the IBM 2104 Expandable Storage Plus subsystem, visit:
SPCN port 0
SPCN port 1
Primary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN port 0
SPCN port 1
Primary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN cabling examples
SPCN port 0
SPCN port 1
Primary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN port 0
SPCN port 1
Primary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN port 0
SPCN port 1
I/O drawer or secondary drawer
SPCN cabling examples