OpenVMS Alpha Version 7.1 and later contains system parameters
that control the operation of bus-addressable pool (BAP).
The CIPCA, CIXCD, KFMSB, and Qlogic ISP 1020 (KZPSM-AA) adapters
are some of the adapters that use bus-addressable pool to improve
performance. BAP is a non-paged dynamic, physical-address-filtered
memory pool used to overcome I/O bus and 32-bit adapter physical
addressing limits.
The following table lists the BAP system parameters and their
default values:
System Parameter | Default Value |
---|
NPAG_BAP_MIN | 0 |
NPAG_BAP_MAX | 0 |
NPAG_BAP_MIN_PA | 0 |
NPAG_BAP_MAX_PA | -1 |
The default values of these parameters enable the system to
boot with any configuration. When AUTOGEN is run on a configured
system, it resets these parameters to values that should enhance
performance for the current system configuration.
If this is an upgrade of OpenVMS, or if the system fails to
boot after a hardware change and displays a message that refers
to incorrect BAP parameters, HP recommends that you perform the
following steps:
To begin the conversational boot, use the
BOOT command in the following format:
BOOT -FLAGS 0,1 [device-name]
For device-name, substitute the device
name of your system disk drive from which you want to boot. For
example, if the system disk has a device name of DKA400, enter the
following command and press the Enter key:
>>> BOOT -FLAGS 0,1 DKA400
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At the SYSBOOT> prompt, enter the following:
NPAG_BAP_MIN 0
NPAG_BAP_MAX 0
NPAG_BAP_MIN_PA 0
NPAG_BAP_MAX_PA -1
This should enable the system
to boot. Once completed, enter the following command:
$ RUN SYS$SYSTEM:AGEN$FEEDBACK.EXE
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The command entered in the preceding
step creates a file that will contain the BAP values for the system
in its current configuration. To see what they are, enter the following
command (the BAP parameters in AGEN$FEEDBACK.DAT do not include
the NPAG_ prefix):
$ SEARCH SYS$SYSTEM:AGEN$FEEDBACK.DAT BAP
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Check MODPARAMS.DAT for any hardcoded
BAP values by entering the following command:
$ SEARCH SYS$SYSTEM:MODPARAMS.DAT BAP
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