Patch Name: PHKL_0700

Patch Description: S700/Allows connection, Model 60/100 Optical Autochangers.

 Programs affected: Those accessing the Model 60/100 Optical Autochanger 
                    devices through the character (raw) devices.

 Files Fixed: sio/autoch.c

 Symptoms:
    A process on a raw/character device will not get started (hang) because
    the swap request queue in the autochanger driver is set in appropriately.
    There is a work around.  By accessing that surface with a read request
    the hung process will get started.

 Fixes:
    autoch.o - When a swap request was active in the autochanger driver and
    was in DAEMON_CALL a flag was set to AC_DELAY which would delay the
    swap request until another process accessed that surface.  The fix
    was not to return AC_DELAY but to schedule the request with the 
    autochanger drivers scheduling algorithm.

Path Name: /hp-ux_patches/s700/8.X/PHKL_0700

Effective Date: 911220

Patch Files: /system/PHKL_0700/new/autoch.o

SR/APR#: None.

"what" string/timestamp: 

     autoch.o: PATCH_8.07: autoch.o $Revision: 1.8.61.13 $ 
     $Date: 91/12/17 14:36:11 $

"sum" output:
     38881 150 autoch.o

Dependencies:  This patch should be applied to HP-UX 8.07 on 700's with any
               system running an Model 60/100 Gigabyte Autochanger and using
               the surfaces through the character (raw) device driver.

Supersedes: None.

Patch Package Size: 102 Kbytes

Installation Instructions: 

     Please review all instructions and the Hewlett-Packard
     SupportLine User Guide or your Hewlett-Packard support terms
     and conditions for precautions, scope of license,
     restrictions, and, limitation of liability and warranties,
     before installing this patch.

     Note: Please back up your system before you patch.

---------------------------------------------------------------------------
After getting the patch onto your machine, unshar the patch (sh PHKL_0700).

To install this patch do the following:
1) Run the update program (Note: you must be logged in as root to update
   a system).
2) Once in the update "Main Menu" move the highlighted line to "Change
   Source or Destination ->" and press "Return" or "Select Item".
3) Make sure the highlighted item in the "Change Source or Destination"
   window is "From Tape Device to Local System ...", then press "Return" or
   "Select Item".
4) You should now be in the "From Tape Device to Local System" window.
   Change the "Source:  /dev/rmt/0m" to "Source: /tmp/PHKL_0700.updt" 
   (this assumes that you are in the /tmp directory where PHKL_0700.updt
   has been placed).  Note: You must enter the complete path name.
5) Press "Done".
6) From here on follow the standard directions for update.

The customized script that update runs will move the original software 
to /system/PHKL_0700/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_0700.text file to /system/PHKL_0700 to be retained for
future reference.

If you wish to put this patch on a magnetic tape and update from the tape
drive, dd a copy of the patch to the tape drive.  As an example the
following will create a copy of the patch that update can read:
dd if=PHKL_0700.updt of=/dev/rmt/0m bs=2048