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Kernel Tunable for PCI Error Recovery
HP-UX 11i Version 3: February 2007

Technical documentation

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pci_eh_enable — enables/disables PCI Error Recovery





1 (Enables PCI Error Recovery.)

Allowed values

Integer values from 0 to 1.

Recommended values

1 (Enables PCI Error Recovery.)


HP-UX supports PCI Error Handling/Recovery to ensure that PCI errors caused by bad cards do not crash a hard partition on high end systems. This functionality helps in recovering the most common parity errors. This tunable is made static because it is very hard to modify hardware capability at run time.

pci_eh_enable is made public so certain service guard users would be able to turn off the functionality.

Who Is Expected to Change This Tunable?

Recommended for service guard customers.

Restrictions on Changing

Changes to this tunable take effect at next reboot.

When Should the Tunable Be Turned On?

This tunable should be turned on to enable PCI Error Recovery functionality

When Should the Tunable Be Turned Off?

To disable PCI Error Recovery functionality

What Are the Side Effects of Turning the Tunable Off?

PCI Error Recovery functionality will be disabled


Even if tunable is ON, PCI Error Handling/Recovery functionality will be disabled if the platform does not have the capability.

All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX.

Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tunable values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see HP-UX Release Notes at http://docs.hp.com.


pci_eh_enable was developed by HP.

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