Active-Active Operation Scenarios; Changing The Operating Mode - Adaptec DuraStor 7220SS User Manual

Active-Active Operation Scenarios

You should understand how the controllers act in different active-
active scenarios.
Dual Boot—When both controllers boot at the same time, they
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exchange information related to their current configuration and
the ownership of resources. The time and date of the B controller
is synchronized with that of the A controller.
Add Array—When a controller adds an array, that controller is
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owner of the array, as well as any dedicated spare disk drives.
Arrays and dedicated spares are not visible to the other
controller when both controllers are online.
Delete Array—A controller may only delete arrays that it owns.
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Pool Spare Configuration—Pool spares are visible to both
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controllers when both controllers are online.
Failover—When a failover occurs, the surviving controller will
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display FAILED OVER on Adaptec Disk Array Administrator,
in the area between the board temperature and date. At this
point, the arrays, dedicated spares, and pool spares of the failed
controller belong to the surviving controller. Resources from the
failed controller are tagged with (FO).
Failback—When a failback occurs, the controller coming online
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regains control of its arrays, dedicated spares, and pool spares
from the other controller.

Changing the Operating Mode

To change the operating mode:
1
From the System Menu, select Configuration Menu and press
Enter.
The Configuration menu appears.
2
Select Option Configuration and press Enter.
The Option Configuration menu appears.
3
Select Operating Mode and press Enter.
The Operating Mode menu appears.
Configuring the Controller
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