B-6
DuraStor 412R/6320SS/7320SS Installation and User’s Guide
, two hosts are connected via two independent
switches. Note that both hosts can still see Controller 1’s LUNs
(LUN 1) and Controller 2’s LUNs (LUN 2). However, each host
HBA can only see one LUN, instead of both.
Figure B-4 Controller 2 Failed
Host 2
FC HBA
FC HBA
Host 1
Switch 1
Switch 2
FC HBA
FC HBA
See's LUN 1
See's LUN 2
See's LUN 1
See's LUN 2
LUN 2
LUN 1
Active
Active
In-Active
In-Active
LUN 2
LUN 2
RAID Controller
SEP
T= Location of internal termination
T
T
Controller 1
SAF-TE Disk I/O
Disk
CH1
Drives 7 - 12
Drives 1 - 6
Disk
CH2
Disk
CH0
Disk
CH3
FC2
FC1
P1
P2
CH 1
CH 2
P3
P4
HOST I/O
RAID Controller
Controller 2
Disk
CH1
Disk
CH2
Disk
CH0
Disk
CH3
FC2
FC1
T
T
T
T
SEP
T
T
Disk I/O
CH 0
CH 3
Host I/O
Connectors
Disk I/O
Connectors
FAILED
DuraStor IUG - Online.book Page 6 Friday, July 19, 2002 3:06 PM