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Best Practices For HBA Installation
Before installing the universal HBA into the system, review the best practices in this section to
avoid potential issues:
"General Best Practices" on page 27
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"Best Practices For Switches and Zoning" on page 27
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"Best Practices For Booting From SAN (BFS) Configurations" on page 28
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"Best Practices For Testing the Environment" on page 29
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General Best Practices
Follow these general best practices for installing and configuring the universal HBA:
Spread the I/O load amongst multiple HBAs and multiple ports to avoid bottlenecks and
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promote higher availability.
Use fixed link speeds instead of auto-negotiation wherever possible. While the universal
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HBA supports auto-negotiation, auto-negotiation slows things down in the event of a fabric
rebuild.
Do not configure both tape devices and disks on the same universal HBA port, even if using
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a switch and zoning.
If more than one of a given HBA model is present in the configuration, enable only the
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OpROM for the first HBA seen in the boot sequence. There is a limited amount of space for
OpROMs, so do not unnecessarily enable all OpROMs, as space usage issues might occur.
When installing the universal HBA, be sure to also install the latest version of the
■
command-line utility available from the manufacturer's website (See
for Updating the BIOS and FCode" on page
firmware, and drivers up-to-date, and update them in that order.
Best Practices For Switches and Zoning
Follow these best practices for switches and zoning in your environment:
FC-SW configurations: check with the switch manufacturer for optimal configuration
■
recommendations, including zoning.
Note that FC-AL is not supported at 16Gb/s or faster. Use FC-P2P instead.
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Use single initiator hard zoning to do the following:
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Avoid Registered State Change Notification (RSCN) storms.
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Shield devices from indiscriminate SCSI inquiries.
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Provide security by avoiding inappropriate access.
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64). Keep the universal HBA utilities,
Chapter 2 • Universal HBA Installation and Removal
To Replace the PCI Bracket
"Installing the CLI
27
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