Adaptec DuraStor 7220SS Installation And User Manual page 83

Hubs Disabled
In the following figures, the DuraStor 7220SS storage subsystem's
two controllers are configured in an active-active dual-port mode
with the internal hubs disabled.
In Figure 3-44, two hosts are connected via two independent
switches. Using external switches supports higher bandwidth,
since the host ports are not required to share bandwidth on a loop.
Host 1
Sees LUN 1 &
LUN 2
FC HBA
Switch 1
Sees LUN 1 &
FC HBA
LUN 2
Host 2
FC HBA
Sees LUN 1 &
LUN 2
Switch 2
FC HBA
Sees LUN 1 &
LUN 2
Figure 3-44 Active-Active Dual-Port Hubs Disabled
Installing the DuraStor Storage Subsystem
DuraStor FC RAID Appliance
FC2
LUN 2
FC1 LUN 2
Controller 2
P2
P1
FC1 LUN 1
P3
FC2 LUN 1
Controller 1
P4
CH0
CH0
Up to 12 Disk Drives
CH1
CH2
CH1
CH3
Up to 12 Disk Drives
CH2
Up to 12 Disk Drives
CH0
T
CH1
T
CH2 CH3
T
CH3
Up to 12 Disk Drives
T
3-49