Chapter 2. Architecture and technical overview
33
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 OpenPower 720 system has internal hot-swappable drives. Internal disks are usually
used for the Linux partition and paging space. The two 4-pack backplanes can be split when
the SCSI RAID Enablement Card is not part of the OpenPower configuration, but specific
customer requirements can be satisfied with the several external disks possibilities that the
OpenPower 720 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 when configured with the POWER Hypervisor
feature) could be provided with up to seven disks for rootvg by using one Ultra3 SCSI adapter
(FC 1974) 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
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
Summary of Contents for OpenPower 720
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