For 'echo -n x"$IFS"x | od -c' I get: 0000000 x \t \n x 0000005
But based on your comments it seems quite likely I actually invoked it as '/dev/sr0 image.iso'. It is common to treat such things the same whether it's a single '='-separated argument to two separate arguments, and my cursory reading of the code suggested it intended to treat them the same. If the '=' is mandatory it is at certainly worth emphasising that in the docs. I'm reluctant to do stand-alone experiments for this since I have only a few blank disks, but I'll aim to check this again when I have another image to write. Hugo -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1832922 Title: cannot use growisofs to write iso image To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dvd+rw-tools/+bug/1832922/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs