HP StorageWorks 3000 RAID Array - Manual (Page 71)

Using Command Console 3-25
Compaq Confidential – Need to Know Required
Writer: Bob Young Project: Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide Comments:
Part Number: AA-RBF2C-TE File Name: d-ch3 Using Command Console.doc Last Saved On: 12/5/00 10:20 AM
Configuring a Dual-Controller System
NOTE: To configure the system for dual-controller operation, you should have a computer
with two serial ports. If your computer has only one serial port, refer to the Hardware
User’s Guide.
The default settings for Windows are shown in Figure 3– 21. For other
operating systems, refer to the Getting Started RAID Array 3000 Installation
Guide.
In dual-controller operation each controller must be configured for either
Active/Active mode or Active/Passive mode.
■ In the Active/Active mode, the top controller sees one host port as
active, while the bottom controller sees the other host port as active. The
controllers see their non-active host ports as passive. If one of the
controllers fails, the surviving controller sees both host ports as active.
Therefore, the surviving controller ensures that both host busses remain
operational. The Active/Active mode can be useful for balancing I/O
activity between controllers.
■ In the Active/Passive mode the primary controller sees both host ports
as active. The remaining controller sees both host ports as passive. If the
primary controller fails, the remaining controller takes over and sees
both host ports as active.
The Active/Active mode is the preferred mode. Configure the Active/Active
mode as follows:
1. In the Storage window double-click on one of the controller icons to
access its property sheets.