I've been working on large image support for UDF, and I've run into an interesting problem. I'm trying to make a udf image of my home directory, which is 5 or 6 GB large. I've done this before and created images about 4GB large, but with my recent attempts, I'm getting B_DEVICE_FULL errors from the operating system when I get to about 1.25GB. The device is in fact, however, not full. I then created a test program which just writes a simple string of data over and over to a given file using either open()/write() or BFile()/BFile::Write(), and both versions successfully create images larger than 1.25GB. The really interesting part comes when I try to append data to the end of these large files. In the listing below, home.udf is the udf image file I was attempting to create with makeudfimage, bfile.udf is the random-data file created via BFile, and open.udf is the random-data file created via open()/write(). As you can see, I can append data to the two random-data files (I killed the cat with ^C after a few seconds), but attempting to append data to home.udf craps out with a B_DEVICE_FULL error (despite the fact I have over 1GB free on the drive, still). -------------------------------------------------------------- /boot $ ll total 5639371 drwxr-xr-x 1 baron users 4096 Jul 5 13:08 apps drwxr-xr-x 1 baron users 2048 Aug 24 2003 beos -rws--sr-- 1 baron users 1615000000 Jul 5 14:16 bfile.udf drwxr-xr-x 1 baron users 2048 Jan 19 19:20 biggg drwxr-xr-x 1 baron users 2048 Aug 24 2003 demos drwxr-xr-x 1 baron users 2048 Aug 24 2003 develop drwxr-xr-x 1 baron users 5120 Jul 5 14:13 home -rw-r--r-- 1 baron users 1343551488 Jul 5 13:59 home.udf -r-S--Sr-- 1 baron users 2816141120 Jul 5 13:59 open.udf drwxr-xr-x 1 baron users 2048 Aug 24 2003 optional drwxr-xr-x 1 baron users 2048 Aug 24 2003 preferences drwxr-xr-x 1 baron users 2048 Aug 24 2003 var /boot $ cat ~/Desktop/desktop.udf >> ./bfile.udf /boot $ cat ~/Desktop/desktop.udf >> ./open.udf /boot $ cat ~/Desktop/desktop.udf >> ./home.udf /bin/cat: write error: No space left on device /boot $ cat ~/Desktop/desktop.udf >> ./open.udf /boot $ ll total 5146677 drwxr-xr-x 1 baron users 4096 Jul 5 13:08 apps drwxr-xr-x 1 baron users 2048 Aug 24 2003 beos -rws--sr-- 1 baron users 1621094848 Jul 5 14:16 bfile.udf drwxr-xr-x 1 baron users 2048 Jan 19 19:20 biggg drwxr-xr-x 1 baron users 2048 Aug 24 2003 demos drwxr-xr-x 1 baron users 2048 Aug 24 2003 develop drwxr-xr-x 1 baron users 5120 Jul 5 14:13 home -rw-r--r-- 1 baron users 1343551488 Jul 5 13:59 home.udf -r-S--Sr-- 1 baron users 2827151168 Jul 5 14:17 open.udf drwxr-xr-x 1 baron users 2048 Aug 24 2003 optional drwxr-xr-x 1 baron users 2048 Aug 24 2003 preferences drwxr-xr-x 1 baron users 2048 Aug 24 2003 var /boot $ ---------------------------------------------------------------- Any ideas what the problem could be? -Tyler