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.
SPCN cabling examples
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 port 0
SPCN port 1
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)
2.7.6External 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:
http://www.storage.ibm.com/hardsoft/products/expplus/expplus.htm
36p5-570 Technical Overview and Introduction
