Technical data

Customizing the Operating System
5.2 Modifying Site-Specific Startup Command Procedures
Example
To connect a nonstandard device called the QQ device, add the following
commands to SYCONFIG.COM:
$ SYSGEN := $SYSGEN
$ SYSGEN CONNECT QQA0
5.2.4.2 Suppressing Autoconfiguration of Devices
You might want to suppress autoconfiguration for various reasons, including the
following ones:
• To customize the order in which you configure devices
• To troubleshoot booting problems
• To allow Small Computer System Interface (SCSI) based workstations to use
devices on another workstation’s SCSI bus without causing conflicts during
boot time
You can define a symbol in SYCONFIG.COM to suppress autoconfiguration. For
more information, see Section 8.4.3.
5.2.5 Modifying SYLOGICALS.COM to Define Systemwide Logical Names
A systemwide logical name applies to the entire system. It is defined in the
system logical name table and can be used by any process in the system. A
clusterwide system logical name applies to every node in the cluster at a system
level. It is defined in the clusterwide system logical name table of every node and
can be used by any process in the system.
In general, system managers edit the SYLOGICALS.COM command procedure
to define site-specific logical names that take effect at system startup. However,
this is not the appropriate command procedure for defining clusterwide logical
names, which is, rather, SYSTARTUP_VMS.COM. Refer to "Preparing a Shared
Environment" in OpenVMS Cluster Systems for more information.
As supplied by Compaq, SYLOGICALS.COM contains commands that assign
systemwide logical names on a MicroVAX system that is not in an OpenVMS
Cluster environment. If your system is not a standalone MicroVAX system, you
can ignore the procedure at the beginning of the template file and add systemwide
logical name assignments to the end of the file.
You can add commands to create your own site-specific systemwide logical names.
In addition, if you want to change default definitions for the following system
logical names, you can include the definitions in SYLOGICALS.COM. Table 5–2
lists some commonly defined logical names.
Table 5–2 Commonly Defined System Logical Names
Logical Name For More Information
‡CLUE$DOCD_DEVICE Section 16.9
LMF$LICENSE OpenVMS License Management Utility Manual
MAIL$SYSTEM_FLAGS Section 5.7
NETNODE_REMOTE DECnet for OpenVMS Networking Manual
‡Alpha specific
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5–8 Customizing the Operating System