Active-Active Dual-Port Mode For San - Adaptec DURASTOR 6320SS Manual

DuraStor 412R/6320SS/7320SS Installation and User's Guide

Active-Active Dual-Port Mode for SAN

At the heart of this strategy is the active-active dual-port operating
mode. In this mode, four fibre channel (FC) ports are
simultaneously active when both controllers are online. In the
event of a controller failure, two FC ports remain available to
service all host I/O.
by each controller in this mode.
Table B-1 LUN Presentation by Controller
Both
Controllers
Online
Controller 1
Failed
Controller 2
Failed
Note that when a controller fails, the surviving controller continues
to present its LUNs to its Host Port 0, and changes to present the
failed controller's LUNs to its Host Port 1. The fibre channel node
and port world wide names corresponding to the failed controller's
Host Port 0 (FC1) are also associated with its LUNs on the
surviving controller's Host Port 1 (FC2).
B-2
Table B-1 illustrates how LUNs are presented
Controller 1 Controller 1
Host Port 0 Host Port 1
(FC1)
Controller Controller
1 LUNs 1 LUNs
Inactive Inactive
Controller Controller
1 LUNs 2 LUNs
Controller 2
Host Port 0
(FC2) (FC1)
Controller
2 LUNs
Controller
2 LUNs
Inactive
Controller 2
Host Port 1
(FC2)
Controller
2 LUNs
Controller
1 LUNs
Inactive