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IBM Power System E850C: Technical Overview and Introduction
Scenario 5: Four Virtual I/O Servers sharing two EXP24S
This scenario assumes four Virtual I/O Servers with two PCIe SAS adapters #5901 each and
two EXP24S set on mode 4. This configuration allows for up to 12 disks to be attached to
each Virtual I/O Server (6 per drawer). This scenario allows disks from different EXP24S
drawers to be mirrored, allowing for hot maintenance of the whole EXP24S drawers if all data
is properly mirrored. Figure 2-31 shows the connection diagram and components of the
solution.
Figure 2-31 Four Virtual I/O Servers sharing two EXP24S
The following are the required feature codes for this scenario:
Two EXP24S drawers #5887 with indicator feature #9365 (mode 4 with four #5901)
Eight PCIe SAS adapter #5901
Four SAS X cables 3 Gbps with proper length
This scenario provides no SSD support.
Other scenarios
For direct connection to logical partitions, different adapters, and cables, see “5887 disk drive
enclosure” in the IBM Knowledge Center:
http://www.ibm.com/support/knowledgecenter/POWER8/p8hdx/POWER8welcome.htm
EXP24S – Mode 4 with 4 x #5901 (config indicator #9365)
2 x SAS X Cables
Virtual I/O
Server #1
#5901
EXP24S – Mode 4 with 4 x #5901 (config indicator #9365)
2 x SAS X Cables
#5901
Virtual I/O
Server #2
#5901
#5901
Virtual I/O
Server #3
#5901
#5901
Virtual I/O
Server #4
#5901
#5901
G1
G2
G3
G4
G1
G2
G3
G4
Summary of Contents for E850C
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