A-3
Theory of Controller Operation
The single-port or dual-port component of the name convention
refers to the number of enabled host ports on the active controller.
Note that there are two host ports on each controller (internally).
summarize the operating modes for the
DuraStor 6320SS and 7320SS, respectively.
Table A-1 Summary of Operating Modes – DuraStor 6320SS
Table A-2 Summary of Operating Modes – DuraStor 7320SS
(DuraStor 7320SS Only)
Another consideration when selecting one
of these topologies is whether you will enable or disable the
internal hubs. Each DuraStor storage subsystem has built-in
internal hubs. These internal hubs, when enabled, essentially
replace the need for external hub hardware. They provide for up to
Operating Mode
Number of
Controllers
Number of Active
Host Ports per
Controller
Number of
Disk Channels
Stand-Alone
Single-Port
1
1
3
Stand-Alone
Dual-Port
1
2
2
Active-Active
Single-Port
2
1
2
Active-Passive
Dual-Port
2
2 (active
controllers only)
2
Operating Mode
Number of
Controllers
Number of Active
Host Ports per
Controller
Number of Disk
Channels
Stand-Alone
Dual-Port
1
2
4
Active-Active
Single-Port
2
1
4
Active-Active
Dual-Port
2
2
4
Active-Passive
Dual-Port
2
2 (active
controllers only)
4
DuraStor IUG - Online.book Page 3 Friday, July 19, 2002 3:06 PM
