External Disk Subsystems - IBM p5 550 Technical Overview And Introduction

Figure 2-11 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)

2.8.5 External disk subsystems

The p5-550 system has internal hot-swappable drives. Internal disks are usually used for the
AIX rootvg and paging space. The two 4-pack backplanes can be split when the SCSI RAID
Enablement Card is not part of the p5-550 configuration, but specific customer requirements
can be satisfied with the several external disks possibilities that the p5-550 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 up to 146.8 GB, at the time this
publication was written. This subsystem can be used in splitbus mode, meaning the bus with
14 disks could be split into two buses with seven disks each. In this configuration, two
additional LPARs (using dedicated devices) could be provided with up to seven disks for
rootvg by using one Ultra3 SCSI adapter (FC 5712) for each LPAR.
For further information about the IBM 2104 Expandable Storage Plus subsystem, visit the
following Web site:
http://www.storage.ibm.com/hardsoft/products/expplus/expplus.htm
IBM TotalStorage FAStT Storage servers
The IBM TotalStorage FAStT Storage server family consists of five models: Model 100, 600,
700, and 900. The Model 100 is the smallest model, which scales up to 14 TB, and Model 900
is the largest, which scales up to 32 TB of disk storage, at the time this publication was
written. Model 600 provides up to 16 bootable partitions that are attached with the Gigabit
SPCN cabling examples SPCN cabling examples
Primary drawer Primary drawer
SPCN port 0 SPCN port 0
SPCN port 1 SPCN port 1
I/O drawer or secondary drawer I/O drawer or secondary drawer
SPCN port 0 SPCN port 0
SPCN port 1 SPCN port 1
Primary drawer Primary drawer
SPCN port 0 SPCN port 0
SPCN port 1 SPCN port 1
I/O drawer or secondary drawer I/O drawer or secondary drawer
SPCN port 0 SPCN port 0
SPCN port 1 SPCN port 1
I/O drawer or secondary drawer I/O drawer or secondary drawer
SPCN port 0 SPCN port 0
SPCN port 1 SPCN port 1
Chapter 2. Architecture and technical overview
31