IBM Power ESE 8412-EAD, Manual

Page: 17 / 40

Table 2. SAS subsystem configurations (continued)
SAS
subsystem
configuration
175 MB Cache
RAID - Dual
IOA
enablement
card (FC 5662)
External SAS
components
SAS port cables SAS cables Limitations
Dual storage
IOA
configuration
using internal
disk drives Yes
Note: The
internal dual
RAID IOA
adapters report
as CCIN 57CF.
None None Not applicable
v Internal cable (FC
1815) cannot be
used with the
dual storage IOA
or high
availability (HA)
RAID
configuration.
v
The six drives
can be HDDs or
SSDs.
Dual storage
IOA
configuration
using internal
disk drives
and external
disk enclosure Yes
Note: The
internal dual
RAID IOA
adapters report
as CCIN 57CF.
Requires an
external disk
enclosure (FC
5886 or FC 5887) Internal SAS port
(FC 1819): SAS
cable assembly
for connecting to
an external SAS
drive enclosure
v
YI cable (FC 3686):
System to SAS disk
enclosure, Single
adapter with Dual
path 1.5 meter
v
YI cable (FC 3687):
System to SAS disk
enclosure, Single
adapter with Dual
path 3 meter
Only HDDs are
supported.
v
Each node in a system can have a different SAS subsystem configuration.
v
Using the SAS drive assembly on nodes 3 and 4 is optional.
Related concepts :
“SAS subsystem service considerations” on page 12
There are several considerations to review before servicing features within the SAS subsystem for the
8412-EAD, 9117-MMB, 9117-MMC, 9117-MMD, 9179-MHB, 9179-MHC, or 9179-MHD system.
“Service considerations for the internal SAS cable for a three-way split backplane” on page 12
To prevent data loss, follow proper procedures before replacing the internal SAS cable for a three-way
split backplane.
“Service considerations for the 175 MB cache RAID - dual IOA enablement card” on page 13
To prevent data loss, follow proper procedures before replacing the 175 MB cache RAID – dual IOA
enablement card.
“Service considerations for the cache battery pack” on page 14
To prevent data loss, follow proper procedures before replacing the cache battery pack on the 175 MB
cache RAID – dual IOA enablement card.
Related information :
Serial-attached SCSI cable planning
175MB Cache RAID - Dual IOA Enablement Card (FC 5662)
SAS subsystem configuration that uses a two-way split backplane
This topic provides rules and examples of a configuration that uses a two-way split backplane.
The following rules apply to this configuration:
SAS subsystem
5