IBM Power 750 - Dual Split Backplane Mode; Triple Split Backplane Mode

Chapter 2. Architecture and technical overview 77
2.8.1 Dual split backplane mode
Dual split backplane mode offers two sets of three disks and is the standard configuration.
One set can be connected to an external SAS PCIe adapter if FC 1819 is selected.
Figure 2-14 shows how the six disk bays are shared with the dual split backplane mode.
Although solid-state drives (SSDs) are supported with a dual split backplane configuration,
mixing SSDs and hard disk drives HDDs in the same split domain is not supported. Also,
mirroring SSDs with HDDs is not possible.
Figure 2-14 Dual split backplane overview
2.8.2 Triple split backplane mode
The triple split backplane mode offers three sets of two disk drives each. This mode requires
an internal SAS Cable (FC 1815), a SAS cable (FC 3679), and a SAS controller, such as SAS
adapter FC 5901. Figure 2-15 on page 78 shows how the six disk bays are shared with the
Dual storage IOA
with internal disk
and external disk
enclosure
Yes Requires an
external disk
drawer:
FC 5887 or
FC 5886
Internal SAS
port (FC 1819)
SAS cable
assembly for
connecting to
an external
SAS drive
enclosure
FC 3686 or
FC 3687
1 meter cable is FC 3686.
3 meter cable is FC 3687.
SAS subsystem
configuration
FC 5662
CCIN 2BC2
External SAS
components
SAS port
cables
SAS cables Notes
I/O Planar DASD Backplane
Hard Disk 2
Hard Disk 3
SAS Port
Expander
Hard Disk 4
Hard Disk 5
Hard Disk 6
SAS Port
Expander
OpticalOpticalInt. SAS Cnt.
Hard Disk 1
Integrated
SAS
Controller
Integrated
SAS
Controller
External SAS Port
P7IOC
P7IOC
Hard Disk 1 Hard Disk 2 Hard Disk 3
Hard Disk 4 Hard Disk 5 Hard Disk 6
Front View