A
call to the Get Device/Volume Information ($GETDVI) system service
returns the following information for any device serviced by the
generic SCSI class driver. (Refer to the description of the $GETDVI
system service in the HP OpenVMS System Services Reference Manual.)
$GETDVI returns the following device characteristics when
you specify the item code DVI$_DEVCHAR:
DEV$M_AVL
Available device
DEV$M_IDV
Input device
DEV$M_ODV
Output device
DEV$M_SHR
Shareable device
DEV$M_RND
Random-access device
DVI$DEVCLASS returns the device class, which is DC$_MISC;
DVI$DEVTYPE returns the device type, which is DT$_GENERIC_SCSI.