B-7
SAN Solution Strategies (DuraStor 7320SS only)
Active-Active Single-Port Mode for SAN
In some scenarios, where the host has a single FC port and the SAN
is not truly fault-tolerant, it may be desirable to configure the
controllers in active-active single-port mode.
Hubs Disabled (Single-Port Hosts and One Switch)
shows two single ported hosts connected to the two
controllers via a single switch.
Figure B-5 Two Hosts, Two Controllers, One Switch
Host 2
FC HBA
Host 1
Switch
FC HBA
Host Link 1
Host Link 2
LUN 2
Active
LUN 2
Passive
LUN 1
Active
LUN 1
Passive
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
I/O Card
CH 0
CH 3
Host I/O
Connectors
Disk I/O
Connectors
DuraStor IUG - Online.book Page 7 Friday, July 19, 2002 3:06 PM