System Startup

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System startup is a complex of events that occur when an OpenVMS system is booted.

Startup Phases

1. Start the CLUSTER_SERVER process.

2. Define logical names needed for basic operations and install images listed in SYS$MANAGER:VMSIMAGES.DAT.

3. Execute SYCONFIG.COM.

4. Add any new drivers by executing AUTOCONFIGURE ALLVAX/IO AUTOCONFIGUREAlpha and I64

5. Install the primary swap file, if the file is present.

6. Start the CONFIGURE process unless NOAUTOCONFIG is set to 1 or STARTUP$AUTOCONFIGURE_ALL is defined as False by SYS$MANAGER:SYCONFIG.COM.

7. Execute SYLOGICALS.COM. At this point, all the devices are available either through the AUTOCONFIGURE command or through the CONFIGURE process.

8. If the system is a satellite node in a VAXcluster or an OpenVMS Cluster environment, execute SATELLITE_PAGE.COM to install page and swap files on a local disk. SATELLITE_PAGE.COM is created when you execute the CLUSTER_CONFIG.COM procedure.


10. Perform the following steps in no specified order:

  • Install required images
  • Start various operating system processes (OPCOM, CACHE_SERVER, ERRFMT, JOBCTL)
  • Execute SYSECURITY.COM and starts the AUDIT_SERVER process
  • On VAX systems, start the SECURITY_SERVER which manages the proxy database and intrusion database
  • Start the LMF and load all appropriate PAK from the LMF database.

11. Perform the following steps in no specified order:

The order of the startup phases is determined in the database file VMS$PHASES.DAT.