Chapter 2. Architecture and technical overview
77
Scenario 4: Dual Virtual I/O Servers sharing two EXP24S
This scenario assumes a dual Virtual I/O Server with two PCIe SAS adapters #5901 each
and two EXP24S set on mode 2. This configuration allows for up to 24 disks to be attached to
each Virtual I/O Server (2 per drawer). If compared to scenario 3, this scenario has the
benefit of allowing disks from different EXP24S drawers to be mirrored. This mirroring allows
for hot maintenance of the whole EXP24S drawers if all data is properly mirrored. Figure 2-30
shows the connection diagram and components of the solution.
Figure 2-30 Dual Virtual I/O Servers sharing two EXP24S
The following are the required feature codes for this scenario:
Two EXP24S drawers #5887 with indicator feature #9361 (mode 2 with dual #5901)
Four PCIe SAS adapter #5901
Four SAS YO cables 3 Gbps with proper length
This scenario provides no SSD support.
EXP24S – Mode 2 with 2 x #5901 (config indicator #9361)
#5901
2 x SAS YO Cables
Virtual
I/O
Server
#1
#5901
Virtual
I/O
Server
#2
#5901
#5901
EXP24S – Mode 2 with 2 x #5901 (config indicator #9361)
2 x SAS YO Cables
GROUP 1
GROUP 2
GROUP 1
GROUP 2
Summary of Contents for E850C
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