Supported FC HBA Settings

Most FC host bus adapter (HBA) drivers have parameters that can be configured using utilities built into the HBA firmware, by utilities supplied by the HBA manufacturer, or through configuration files. To determine which parameters can be configured and how to configure the parameters, refer to your HBA vendor documentation.

HBA settings control many aspects of HBA driver behavior, which affect how Oracle FS Path Manager (FSPM) and Microsoft Multipath I/⁠O (MPIO) manage transient errors and other events in the SAN and in the Oracle FS System.

We recommend defining the following HBA characteristics to work well with FSPM:

Allow a maximum of 64 commands to be outstanding on each target port.
Wait at least 100 seconds after detecting a loss of link before reporting to the operating system that the link is down.
Wait at least 30 seconds to retry access to a target port before assuming that the port or target has failed.
Allow access to up to 256 LUNs per target.

Here are recommended settings:

Table 1 Recommended QLogic HBA settings
Parameter	Value
Execution Throttle	64 maximum
Link Down Timeout	100 minimum
Port Down Retry Count	30 minimum
LUNs per Target	256

Table 2 Recommended Emulex HBA settings
Parameter	Value
QueueDepth	64 maximum
LinkTimeOut	100 minimum
NodeTimeOut	30 minimum
QueueTarget	1

Unless you have a particular requirement to set other configuration parameters to custom values, we recommend using the HBA manufacturer’s recommendations or default values.

Refer to the Oracle FS System Support and Interoperability Guide, located on the Oracle Technology Network (http://www.oracle.com/technetwork/documentation/oracle-unified-ss-193371.html).

For additional information on HBAs not listed in this document, go to the Oracle Technology Network (http://www.oracle.com/technetwork/index.html).