HP 3000 Manuals

Controlling System Activity

Unloading A Nonsystem Disk 

Nonsystem volumes cannot be unloaded when in use.  If the LOAD/UNLOAD
button is pressed on a nonsystem disk while it is in use, the following
error message will be displayed on the system console:
____________________________________________________________________
|                                                                  |
|                                                                  |
|      DISMOUNT REQUEST FOR LDEV#n DENIED. NON-SYSTEM DISC IN USE! |
|      Warning:  REPOSITION BUTTON BACK TO LOAD POSITION.          |
|                                                                  |
____________________________________________________________________

It is then necessary to reposition the button back to the LOAD position,
and wait until the disk is no longer in use, before depressing the button
again.

Note that, as with the system, if you forget to reposition the
LOAD/UNLOAD button after receiving the above warning, and a powerfail
occurs, the disk will spin down (unload).  It will then be necessary for
you to restart the disk by resetting the LOAD/UNLOAD button to the LOAD
(in) position.

MPE/iX 5.0 Documentation