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A-52 AlphaServer DS20L User’s Guide
A.20.10 pci_parity
Disables or enables parity checking on the PCI bus.
Syntax: set pci_parity value
where value can be:
(default) on
Enables PCI parity checking.
off
Disables PCI parity checking.
Some PCI devices do not implement PCI parity checking, and some have a parity-
generating scheme in which the parity is sometimes incorrect or is not fully
compliant with the PCI specification. A side effect of this is that superfluous PCI
parity errors are reported by the host PCI bridge. In such cases, the device can be
used as long as parity is not checked; disabling PCI parity checking prevents false
parity errors that can cause system problems.
A.20.11 pk*0_fast
Enables fast SCSI to perform in either standard or fast mode.
Syntax: set pk*0_fast scsi_speed
where scsi_speed can be:
(default) 1
The controller is in fast SCSI mode.
0
The controller is in standard SCSI mode.
If the system has at least one fast SCSI device, set the default controller speed to
fast SCSI (1). Devices on a controller that connects to both standard and fast SCSI
devices will perform at the appropriate rate for the device. If the system has no
fast SCSI devices, set the default controller speed to standard SCSI (0). If a fast
SCSI device is on a controller set to standard, it will perform in standard mode.