A rare condition exists on Sun Fire V20z/V40z systems with the AMD 8131 chipset whereby data integrity could be adversely affected.

Note: AMD has issued "Errata #56" detailing this condition, available at http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26310.pdf.

This issue can occur on the following platform:

• Sun Fire V20z/V40z without NSV (BIOS Update) version 2.1.0.16 (NSV bundles)

Note: This condition affects PCI-X cards in 133 MHz slots only.

Stale data can be delivered to a PCI-X card running at 133 MHz via split completion cycles. There are no visible indications that this condition has occurred.

There is no workaround. Please see the "Resolution" section below.

This issue is addressed on the following platform:

• Sun Fire V20z/V40z with NSV (BIOS Update) version 2.1.0.16 (NSV bundles)

This BIOS update can be downloaded from http://wwws.sun.com/software/download/products/416df7a5.html.

Note: Sun is providing this BIOS solution (as recommended by AMD) to resolve this issue for high-speed, 1, 2, or 3 function PCI-X cards. Sun Fire V20z systems will need to use the 66 MHz slot when utilizing either "4-function" cards or 133 MHz cards. "4-function" PCI-X cards (such as Sun's X9273A Gigabit Quad Ethernet card) are not addressed by this BIOS update. Sun does not recommend or support a "4-function" PCI-X card in a 133 MHz slot (one slot in Sun Fire V20z, four slots in Sun Fire V40z).

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