5137ch02.fm
Draft Document for Review October 14, 2014 10:19 am
94
IBM Power Systems E870 and E880 Technical Overview and Introduction
Scenario 5 - Four Virtual I/O Servers sharing two EXP24S
This scenario assumes four Virtual I/O Server with two PCIe SAS adapter #5901 each and
two EXP24S set on mode 4, allowing for up to 12 disks to be attached to the each Virtual I/O
Server (6 per drawer). This scenario has the benefit to allow disks from different EXP24S
drawers to be mirrored, allowing for hot maintenance of the whole EXP24S drawers if all data
is properly mirrored. Figure 2-38 on page 94 shows the connection diagram and components
of the solution.
Figure 2-38 Four Virtual I/O Servers sharing two EXP24S
For this scenario, the required feature codes are:
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.
There is no SSD support on this scenario.
Other Scenarios
For direct connection to logical partitions, different adapters and cables, see “5887 disk drive
enclosure” in the IBM Knowledge Center:
(point to correct link when infocenter is active)
http://www-01.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
