IBM Power System 5148-21L

SAS subsystem service considerations
There are several considerations to review before servicing features within the SAS subsystem for the
5148-21L, 5148-22L, 8247-21L, 8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, or 8286-42A system.
Before servicing any features, review the I/O configurations for each logical partition on your system. It
is important to understand the differences between the various configurations and the resulting service
considerations. In addition, consider possible impacts to the following areas:
v Logical partitions and their I/O adapter assignments
v RAID array configurations
v Physical disk locations
v Path to your boot device
Related concepts:
“SAS subsystem storage configurations” on page 5
Several SAS subsystem storage configurations are supported on the 5148-21L, 5148-22L, 8247-21L,
8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, or 8286-42A systems.
Related information:
Logical partitioning
SAS RAID controllers for IBM i
SAS RAID controllers for Linux
SAS RAID controllers for AIX
P8EG2613-3
SASConfiguration3 :FCEJ0P
18SFF(2.5”)HDDorSSD
8(1.8”)SSD
RAID0,10,5,6
DualStorageIOA
DualHighPerformance Storage
Controllers:CCIN57D8
HighPerformanceStorage
Controller:CCIN57D8
SASI/Oattachcable
HighPerformanceDASDBP
CCIN2B0F
SASConfiguration3
D1-D26(C14)
D1-D26(C15)
Figure 9. Disk bays controlled by the expanded function disk drive backplane in the 8286-41A and 8286-42A systems
SAS subsystem 11