Specifications

Chapter 2. Architecture and technical overview 81
(2/2/2) without feature 5662. With feature #5662, they support dual controllers running one
set of six bays.
Figure 2-22 shows the internal SAS topology overview.
Figure 2-22 Internal SAS topology overview
The system backplane also includes a third embedded controller for running the DVD-RAM
drive in the CEC enclosure. Because the controller is independent from the two other SAS
disk/SSD controllers, it allows the DVD to be switched between multiple partitions without
impacting the assignment of disks or SSDs in the CEC drawer.
Table 2-28 summarizes the internal storage combination and the feature codes required for
any combination.
Table 2-28 SAS configurations summary
SAS
subsystem
configuration
#5662 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
(#5901)
Internal SAS
port (#1815)
SAS cable
for three-way
split
backplane
AI cable
(#3679) -
Adapter to
internal drive
(1 meter)
IBM i does not support
this combination.
An I/O adapter can be
located in another
enclosure of the
system.
P7IOC
Integrated
SAS Adapter
P7IOC
DVD
DASD
DASD
DASD
VSES
Redriver
Integrated
SAS Adapter
Integrated
SAS Adapter
Redriver
SAS Port Exp.
A
SAS Port Exp.
B
Optional
Battery
Optional
Battery
External Port