Adaptec DuraStor 7220SS Installation And User Manual page 82

DuraStor 6220SS/7220SS Installation and User's Guide
Figure 3-43 illustrates the conditions when Controller 2 fails. Note
that both hosts can still see Controller 1's LUNs (LUN 1) and
Controller 2's LUN (LUN 2); however, each host HBA can only see
one LUN, instead of both.
Host 1
Sees LUN 1
FC HBA
Switch 1
Sees LUN 2
FC HBA
Host 2
FC HBA
Sees LUN 1
Switch 2
FC HBA
Sees LUN 2
Figure 3-43 Active-Active Dual-Port Hubs Enabled, Controller 2 Failure
3-48
DuraStor FC RAID Appliance
FC2
LUN 2
FC1 LUN 2
Controller 2
P2
P1
FC1 LUN 1
P3
FC2
LUN 2
Controller 1
P4
CH0
CH0
Up to 12 Disk Drives
CH1
CH2
CH1
CH3
Up to 12 Disk Drives
CH2
CH0 Up to 12 Disk Drives
T
CH1
T
CH2 CH3
T
CH3
Up to 12 Disk Drives
T