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This is documentation for Caché & Ensemble. See the InterSystems IRIS version of this content.

For information on migrating to InterSystems IRIS, see the InterSystems IRIS Migration Guide and Migrating to InterSystems IRIS, both available on the WRC Distributions page (login required).


Contains user-specified device status information.




$DEVICE can be used to record device status information. You can use the SET command to place a value in $DEVICE. By convention, this value should describe the outcome of an I/O operation as a 3-piece string, in the form:


By default, $DEVICE contains the null string.

See Also