← Back to team overview

desktop-packages team mailing list archive

[Bug 1424215] Re: growisofs BD-R overflow error despite capacity check


Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: dvd+rw-tools (Ubuntu)
       Status: New => Confirmed

You received this bug notification because you are a member of Desktop
Packages, which is subscribed to dvd+rw-tools in Ubuntu.

  growisofs BD-R overflow error despite capacity check

Status in dvd+rw-tools package in Ubuntu:

Bug description:

  firstly: thanks for taking care of

  Secondly: I hate to say it now, but i think a Debian user
  just complained about the problem's little brother:


  reports that an oversized burn attempt used up the
  medium and finally ended by

    :-[ WRITE@LBA=b87400h failed with SK=5h/END OF USER AREA ENCOUNTERED
  ON THIS TRACK]: Input/output error

  I believe that the not-yet-aware bug reporter in
  forums.debian.org tried to squeeze data for the capacity of
  an unformatted BD-R into a then formatted BD-R with not
  enough capacity.

  growisofs.c has code to prevent the start of such a burn:

    off64_t        capacity=0, ... ;
      if (ioctl_handle!=INVALID_HANDLE)
          capacity = get_capacity (ioctl_handle);
          if (capacity && progress.final > capacity)
          {   fprintf (stderr,":-( %s: %"LLD" blocks are free, "
                              "%"LLD" to be written!\n",

          pwrite64_method = poor_mans_setup (ioctl_handle,

  But the BD-R gets automatically formatted not before the
  call to growisofs_mmc.cpp : poor_mans_setup()

          case 0x41:      // BD-R SRM
              if ((disc_info[2]&3) == 0)  // blank
                  bd_r_format (cmd);

  This lets the capacity shrink from 25,025,314,816 to
  24,220,008,448 = 0xb87400 * 2048.

  I will have to think about possible remedies.
  Problem is that one has to reliably predict the formatted
  capacity in order not to format the BD-R and to then say
  "Hey ! Now your data do not fit any more !"

  But that would mean to derive a predictor function
  from bd_r_format(). This will not be as small a patch
  as the one in bug 1113679.
  And not be developped in half an hour, i fear.
  It does not only have to predict the size but also
  whether auto-formatting will happen at all.

  In any case i'd need a tester who's willing to burn
  a few tightly filled BD-R (hopefully sucessfully).

  Have a nice day :)


To manage notifications about this bug go to: