System information

Advanced Functions
5-15
• Active-Active Redundant Single MPIO Host (Quad Channel)
As Figure 5-7 shows, the redundant RAID system is operating in a single MPIO host environment using the symmetric
storage method. The access channel is established via four fibre ports, fcpa1, fcpa2, fcpb1, and fcpb2. The redundant
paths of all LUNs are also established by mapping them across four fibre ports.
In this configuration, for DG0LD0, the green path is the active path while the red path is the standby path, when the green
path fails, the link transfroms and access will be continued by the red dotted path; for DG1LD0, the condition is reversed.
The steps to configure the LUN mappings is the same as the dual channel configuration of redundant single MPIO host.
See the following Configuration Tasks table for the quad channel configuration according to the example given in
Figure 5-7.
Configuration Tasks
Tasks Instructions
Create Virtual volumes and specify the preferred
controller
RAID Management > Disk Groups > Create DG0 and DG1
RAID Management > Logical Disks > Create DG0LD0 >
Specify the preferred controller as ctla
RAID Management > Logical Disks > Create DG1LD0 >
Specify the preferred controller as ctlb
Select Storage Provisioning method RAID Management > Storage Provisioning > Symmetric
Add WWPN of HBAs to hosts HBA0 WWPN -> Host 0 -> Host Group 0
HBA1 WWPN -> Host 1 -> Host Group 0
HBA2 WWPN -> Host 2 -> Host Group 0
HBA3 WWPN -> Host 3 -> Host Group 0
Map LUNs to host groups DG0LD0 and DG1LD0 -> Host Group 0
Figure 5-7 Redundant Single MPIO host (quad channel)
FCP1FCP2FCPa2 FCPa1 FCP1FCP2FCPb2 FCPb1
DG0LD0
DG1LD0
Host
WWPN
WWPN
WWPN
WWPN
HBA2 HBA3HBA1HBA0
Host Group 0
MPIO
MPIO
Controller BController A