HP BA322 90087 User Manual
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shadowing, see the HP Volume Shadowing for OpenVMS manual. For more information about
setting ALLOCLASS for clusters, see the HP OpenVMS Cluster Systems manual.
7.5 Tuning BAP System Parameters (Alpha Upgrade Only)
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:
Default Value
System Parameter
0
NPAG_BAP_MIN
0
NPAG_BAP_MAX
0
NPAG_BAP_MIN_PA
-1
NPAG_BAP_MAX_PA
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:
1.
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
2.
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
3.
This should enable the system to boot. Once completed, enter the following command:
$ RUN SYS$SYSTEM:AGEN$FEEDBACK.EXE
4.
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
5.
Check MODPARAMS.DAT for any hardcoded BAP values by entering the following
command:
$ SEARCH SYS$SYSTEM:MODPARAMS.DAT BAP
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After Installing or Upgrading the OpenVMS Operating System