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Showing I/O Device Status with SHOWDEV [ Getting System Information Programmer's Guide ] MPE/iX 5.0 Documentation


Getting System Information Programmer's Guide

Showing I/O Device Status with SHOWDEV 

The SHOWDEV command reports the status of input and output devices on the
system.  Entered without parameters, SHOWDEV displays status information
for all output and input devices.  The display looks like this:

     :SHOWDEV 
     LDEV AVAIL     OWNERSHIP       VOLID     DEN  ASSOCIATION
      1   DISC      43 FILES
      6   SPOOLED   SPOOLER OUT
      8   AVAIL
     20 A UNAVAIL   #S311: 2 FILES

If applicable, the following information is shown:

       Column                                     Meaning 

LDEV                 The logical device number.  If applicable, also shows:

                     J - Accepts jobs

                     D - Accepts data

                     A - Accepts jobs and data

AVAIL                Lists availability of devices and disks as follows:

 AVAIL                Available as a real, nonshareable device.

 SPOOLED              Available using input or output spooling.

 UNAVAIL              Not available (under the control of a job,
                      session, or system process).

 DISC                 Always available.

OWNERSHIP            Device ownership; may show one of the following:

 SYS                  Controlled by the system.  Process
                      identification number (PIN) of the
                      controlling process may also be shown.

 SPOOLER IN           Input spooling in effect.

 SPOOLER OUT          Output spooling in effect.

 #Jnnn                Controlled by the job indicated.

 #Snnn                Controlled by the session indicated.

 DIAG                 Allocated to diagnostic testing by system
                      operation.

 nn FILES             Number of files currently in use on a disk.

 DOWN                 Device is offline, requested by system
                      operator.

 DP                   Device is being taken offline (DOWN command
                      is pending).

VOLID                Volume identification; may include one of the following:

 IBM                  Volume label is written in IBM format.

 ANSI                 Volume label is written in ANSI format.

 NOLABEL              Volume has no label (default).

DEN                  Tape density; may include one of the following:

 6250                 Density of 6250 BPI.

 1600                 Density of 1600 BPI, or density is
                      unrecognizable.

ASSOCIATION          Indicates logical devices (by class) that have been
                     established by the user with the ASSOCIATE command.



MPE/iX 5.0 Documentation