This command is for use on Alpha and Integrity servers only.
    It displays information about device drivers loaded into the
    system, the devices connected to them, and their I/O databases.
    All addresses are in hexadecimal and are virtual.

    On VAX systems, use the SYSGEN command SHOW/DEVICE.

    Format

      IO SHOW DEVICE

1  –  Description

    The SYSMAN IO SHOW DEVICE command displays information about the
    device drivers loaded into the system, the devices connected to
    them, and their I/O databases.

    The SYSMAN IO SHOW DEVICE command specifies that the following
    information be displayed about the specified device driver:

    Driver   Name of the driver
    Dev      Name of each device connected to the driver
    DDB      Address of the device's device data block
    CRB      Address of the device's channel request block
    IDB      Address of the device's interrupt dispatch block
    Unit     Number of each unit on the device
    UCB      Address of each unit's unit control block

    All addresses are in hexadecimal and are virtual.

    For additional information about SYSMAN, see A Comparison of
    System Management on OpenVMS AXP and OpenVMS VAX (archived) but
    available on the OpenVMS Documentation CD-ROM) and the VSI OpenVMS
    System Manager's Manual.

2  –  Example

  SYSMAN> IO SHOW DEVICE

      The following example is a sample display produced by the
      SYSMAN IO SHOW DEVICE command:

        __Driver________Dev_DDB______CRB______IDB______Unit_UCB_____
        SYS$FTDRIVER
                        FTA 802CE930 802D1250 802D04C0
                                                         0 801C3710
        SYS$EUDRIVER
                        EUA 802D0D80 802D1330 802D0D10
                                                         0 801E35A0
        SYS$DKDRIVER
                        DKI 802D0FB0 802D0F40 802D0E60
                                                         0 801E2520
        SYS$PKADRIVER
                        PKI 802D1100 802D13A0 802D1090
                                                         0 801E1210
        SYS$TTDRIVER
        OPERATOR
        NLDRIVER

      SYS$TTDRIVER, OPERATOR, and NLDRIVER do not have devices
      associated with them.