This command is for use on Alpha and Integrity servers only. It
    rebuilds device configuration tables in preparation for using the
    SYSMAN IO AUTOCONFIGURE command to reconfigure the system.

    Format

      IO REBUILD

1  –  Qualifier

1.1    /VERIFY

    Causes SYSMAN to read and process the files SYS$SYSTEM:SYS$USER_
    CONFIG.DAT and SYS$SYSTEM:CONFIG.DAT, but not to apply the files
    to the I/O database. Messages will be displayed for any errors
    that are encountered. This command can be used by developers
    to test new changes to SYS$SYSTEM:SYS$USER_CONFIG.DAT without
    modifying the current system.

2  –  Description

    The SYSMAN IO REBUILD command rebuilds the system's
    device configuration tables by reading and parsing the
    SYS$SYSTEM:SYS$USER_CONFIG.DAT and SYS$SYSTEM:SYS$CONFIG.DAT
    files.

    To debug modifications to the SYS$SYSTEM:SYS$USER_CONFIG.DAT
    file, you can use the SYSMAN IO REBUILD and SYSMAN IO
    AUTOCONFIGURE commands to load drivers without having to reboot.
    Once you load a driver for an adapter, however, you cannot reload
    it without rebooting the system.

3  –  Example

  SYSMAN> IO REBUILD
  SYSMAN> IO AUTOCONFIGURE

      The first command in this example rebuilds device configuration
      tables. The second command reads the device configuration
      tables and loads drivers for newly defined drivers.