A-19
Theory of Controller Operation
Figure A-14 Active-Active Dual-Port Mode with Hubs Enabled and Both
Controllers Active
Figure A-15 Active-Active Dual-Port with Hubs Enabled and Controller 2
Failed
Host I/O
Connectors
Drive I/O Connectors
Controller FC Host Ports
RAID Controller
SEP
T= Location of internal termination
T
T
Controller 1
ACTIVE
ACTIVE
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
Active
HOST I/O
Active
RAID Controller
Controller 2
Disk
CH1
Disk
CH2
Disk
CH0
Disk
CH3
FC2
FC1
Active
Active
T
T
T
T
Controller Disk Ports
SEP
T
T
I/O Card
CH 0
CH 3
HUB
HUB
Host I/O
Connectors
Drive I/O Connectors
Controller FC Host Ports
RAID Controller
SEP
T= Location of internal termination
T
T
Controller 1
ACTIVE (FAILED OVER)
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
Active
(CTRL 1)
HOST I/O
Active
(CTRL 2)
RAID Controller
Controller 2
FAILED
Disk
CH1
Disk
CH2
Disk
CH0
Disk
CH3
FC2
FC1
Inactive
Inactive
T
T
T
T
Controller Disk Ports
SEP
T
T
Disk I/O
CH 0
CH 3
HUB
HUB
DuraStor IUG - Online.book Page 19 Friday, July 19, 2002 3:06 PM