Configuring the QLogic HBA for hosts that run the Windows Server operating system

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After you install the QLogic HBA and the device driver on hosts that run a Microsoft Windows Server operating system, you must configure the HBA.

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For more information about supported QLogic models, see the following IBM® website:

www.ibm.com/support

To configure the HBA BIOS, either use the QLogic HBA manager software or reboot into the Fast!UTIL tool. Configure the following settings:

Host Adapter BIOS: Disabled (unless the machine is configured for SAN Boot)
Adapter Hard Loop ID: Disabled
Connection Options: 1 - point to point only
LUNs Per Target: 0
Port Down Retry Count: 15

Set the execution throttle to a suitable queue depth for your environment, for example, a value of 100. For more information about the execution throttle and queue depth, see QLogic documentation.

If you are using Native Multipathing Plug-In (NMP), set Enable Target Reset to No. See Table 1 to include the required parameters for the registry key.

Table 1. Registry key parameters for QLogic models
Key	Required parameters
HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Services > ql2`xxx` > Parameters > Device > DriverParameters	Buschange=0;FixupInquiry=1 Note: If you are using QLogic driver version 9.1.2.11 or later, Buschange cannot be set to zero. See your device driver documentation for details.