Hi,

possibly this bug has the same cause as

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=794868
  "Burn failure of growisofs on DVD-R[W] with write type DAO"

but less dire consequences, depending on drive type and bus
hardware. I wonder, though, how option
  -use-the-force-luke=dummy
can yield a readble medium with matching MD5. It is supposed
to disable real burning inside the drive.

If it is the same growisofs bug, then it should vanish if
you omit option
  -use-the-force-luke=dao:1221628


If you feel apt to get dvd+rw-tools source, to apply the following
change, and to compile it, then please do

-------------------------------------------------------------------
--- growisofs_mmc-7.1-11.cpp    2015-08-07 13:07:52.000000000 +0200
+++ growisofs_mmc.cpp   2015-08-07 14:06:31.375597960 +0200
@@ -540,7 +540,7 @@ ssize_t poor_mans_pwrite64 (int fd,const
        // own higher HZ value and disrespects the user-land one.
        // Sending them down as milliseconds is just safer...
        //
-       if (!(errcode=cmd.transport (WRITE,(void *)buff,size)))
+       if (!(errcode=cmd.transport (WRITE,(void *)buff,nbl*2048)))
            break;

        //--- WRITE failed ---//
-------------------------------------------------------------------

and run

  sudo ./growisofs ...your.arguments.including.dao...

to check whether the burn run now ends neatly.


Have a nice day :)

Thomas


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