Accusys ExaRAID GUI - Manual (Page 197)

Advanced Functions
5-24
• 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.
Select Storage Provisioning
method RAID Management > Storage
Provisioning > Simple
Specify the LUN ID and map
LUNs to fiber ports fcpa2 -> DG0LD0
fcpa2 -> DG1LD0
fcpb2 -> DG0LD0
fcpb2 -> DG1LD0
Figure 5-7 Redundant Single MPIO host (quad channel)
FCP1 FCP2 FCPa2 FCPa1 FCP1 FCP2 FCPb2 FCPb1
DG0LD0 DG1LD0
Host
WWPN
WWPN
WWPN
WWPN
HBA2 HBA3 HBA1 HBA0
Host Group 0
MPIO
MPIO
Controller B Controller A