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3-47
Installing the DuraStor Storage Subsystem
Hubs Enabled
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 enabled.
In
Figure 3-42
, two hosts are connected via two independent loops
using the enclosure’s built-in hub bypass circuits. These circuits
provide two internal hubs, eliminating the need for the use of
external Fibre Channel hardware, other than the cables.
Figure 3-42 Active-Active Dual-Port Hubs Enabled
P2
FC2
FC1
FC2
FC1
Controller 2
DuraStor FC RAID Appliance
Host 2
Controller 1
CH0
CH0
CH1
CH1
CH2
CH2
CH3
CH3
CH0
CH1
CH2
CH3
P1
P3
P4
HUB
FC HBA
FC HBA
Host 1
FC HBA
FC HBA
HUB
Sees LUN 1 & LUN 2
Sees LUN 1 & LUN 2
Sees LUN 1 & LUN 2
Sees LUN 1 & LUN 2
LUN 1
LUN 1
LUN 2
LUN 2
Up to 12 Disk
Up to 12 Disk
Up to 12 Disk
Up to 12 Disk
DuraStor IUG.book Page 47 Wednesday, January 30, 2002 10:49 AM