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IBM Power 750 and 760 Technical Overview and Introduction
is required if IBM i is to access any of the SAS bays in that processor enclosure. AIX and
Linux support configurations using two sets of three bays (3/3) or three sets of two bays
(2/2/2) without the dual IOA enablement card. With FC 5662, they support dual controllers
running one set of six bays.
The system backplane also includes a third embedded controller for running the DVD-RAM
drive in the system enclosure. Because the controller is independent from the two other SAS
disk or SSD controllers, it allows the DVD to be switched between multiple partitions without
affecting the assignment of disks or SSDs in the system enclosure.
Figure 2-13 shows the internal SAS topology overview.
Figure 2-13 Internal SAS topology overview
Table 2-22 summarizes the internal storage combination and the feature codes that are
required for any combination.
Table 2-22 SAS configurations summary
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
Optical
Optical
Int. SAS Cnt.
Hard Disk 1
Integrated
SAS
Controller
Integrated
SAS
Controller
External SAS Port
P7IOC
P7IOC
SAS subsystem
configuration
FC 5662
CCIN 2BC2
External SAS
components
SAS port
cables
SAS cables
Notes
Two-way split
backplane
No
None
None
N/A
IBM i does not support this
combination.
Connecting to an external
disk enclosure is not
supported.
Three-way split
backplane
No
Dual x4 SAS
adapter
(FC 5901
CCIN 57B3)
Internal SAS
port (FC 1815)
SAS cable for
three-way split
backplane
AI cable
(FC 3679) -
Adapter to
internal drive
(1 meter)
IBM i does not support this
combination.
Dual storage IOA
with internal disk
Yes
None
None
N/A
Internal SAS port cable
(FC 1815) cannot be used
with this or high availability
RAID configuration.