HP 3000 Manuals

Performing System Operation Tasks

Loading and Unloading Disk Packs 

As a system operator, you are responsible for maintaining your system's
disk drives.  Each disk drive has either a removable disk pack or
nonremovable disk pack.  The removable disk pack is available in two
styles:

   *   A two-pack.

   *   An eight-pack.

If you have a removable disk pack, the following procedures assist you
with loading and unloading removable disk packs.

To load a disk pack 

   1.  Set the LOAD/UNLOAD button to the outer position.


            

   2.  Press the UNLOCK DOOR button.  When the DOOR OPEN message appears,
       lift the top door.


            

   3.  Detach the removable base of the disk pack.


            

   4.  Holding the disk pack by the handle, lower it into the drive.


            

   5.  Align the indexing marks and turn the disk pack clockwise until it
       stops.


            

   6.  Fold the handle over so that it lies flat against the disk pack,
       and store the removable base on top of the handle so that it does
       not get lost.


            

   7.  Close the top door and press the LOAD/UNLOAD button to the LOAD
       position.


            

       Once the LOAD button is pressed, the disk drive spins up to speed
       and performs a diagnostic routine.  The following messages will
       appear in the window display:

          *   TESTING

          *   SPIN UP

          *   AIR PURGE

          *   TESTING

          *   DRIVE # (The drive number will be one or two numbers
              between zero and seven.)

       The AIR PURGE message refers to the elimination of contaminants
       and air in the disk drive.  The disk drive operates in a vacuum
       environment.  Data is not manipulated in any way.

To unload your disk pack 

   1.  You must shut down the operating system (MPE/iX) before attempting
       to unload a disk from the system domain.

       If the LOAD/UNLOAD button on the disk drive is inadvertently
       pressed while the system is running, the system disk refuses the
       UNLOAD. The ACTIVITY panel indicates BUSY, momentarily, and the
       following message appears on the system console:
________________________________________________________________________
|                                                                      |
|                                                                      |
| UNLOAD ON LDEV#n DENIED. =SHUTDOWN MUST PRECEDE AN                   |
| UNLOAD ON A SYSTEM DISC                                              |
| Warning: REPOSITION BUTTON BACK TO LOAD POSITION.                    |
|                                                                      |
________________________________________________________________________

            

       If the LOAD/UNLOAD button is not repositioned to the LOAD position
       and a powerfail occurs, the drive spins down and a NOT READY
       message appears on the system console.  At this point, it is
       necessary to reposition the LOAD/UNLOAD button back to the LOAD
       position in order to spin the drive up.

   2.  After you have shut down the operating system, set the LOAD/UNLOAD 
       button to the outer position (UNLOAD).

   3.  Press the UNLOCK DOOR button after the disk drive spins down.


            

   4.  When the DOOR OPEN message appears, lift the top door.  Lift the
       handle of the disk pack.  Turn the disk pack counterclockwise
       until the indexing marks are aligned, and then lift out the pack.


            

   5.  Place the removable base on the underside of the disk pack.

To unload a nonsystem disk 

No disk packs can be unloaded when in use.

   1.  If the LOAD/UNLOAD button is pressed on a nonsystem disk while it
       is in use, the following error message displays on the system
       console:
________________________________________________________________________
|                                                                      |
|                                                                      |
| DISMOUNT REQUEST FOR LDEV#n DENIED.  NON-SYSTEM DISC IN USE!         |
| Warning: REPOSITION BUTTON BACK TO LOAD POSITION.                    |
|                                                                      |
________________________________________________________________________

            

   2.  Reposition the button back to the LOAD position.  Wait until the
       disk is no longer in use.  Then press the button again.


            

       If you forget to reposition the LOAD/UNLOAD button after receiving
       the above warning, and a powerfail occurs, the disk spins down
       (unloads).  It is then necessary for you to restart the disk by
       resetting the LOAD/UNLOAD button to the LOAD (in) position.

MPE/iX 5.0 Documentation