I've bought 10 Dick Smith DVD-R's, and they only have 1,852,960 blocks available on them, not the full 2,298,496 (3.5GiB of data, not 4.4GiB). At least that's what K3B and GnomeBaker both claim. It might be my DVD burner at fault, I haven't tried other disks yet. I can't find any explanation of what's going on here, does anyone know? This is K3B's debugging output: System ----------------------- K3b Version: 1.0 KDE Version: 3.5.6 QT Version: 3.3.7 Kernel: 2.6.20-16-generic Devices ----------------------- HL-DT-ST DVDRAM GSA-4160B A300 (/dev/hdd, ) [CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD+R DL] [DVD-ROM, DVD-R Sequential, DVD-RAM, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Restricted Overwrite] Burned media ----------------------- DVD-R Sequential K3bIsoImager ----------------------- mkisofs print size result: 2267770 (4644392960 bytes) Pipe throughput: 20480 bytes read, 0 bytes written. Used versions ----------------------- mkisofs: 1.1.2 growisofs: 7.0.1 growisofs ----------------------- Executing 'builtin_dd if=/dev/fd/0 of=/dev/hdd obs=32k seek=0' :-( /dev/hdd: 1852960 blocks are free, 2267770 to be written! growisofs command: ----------------------- /usr/bin/growisofs -Z /dev/hdd=/dev/fd/0 -use-the-force-luke=notray -use-the-force-luke=tty -use-the-force-luke=tracksize:2267770 -dvd-compat -speed=4 -use-the-force-luke=bufsize:32m mkisofs ----------------------- 2267770 I: -input-charset not specified, using utf-8 (detected in locale settings) Using HOOTING_YARD_ON_THE_AIR_000.MP3;1 for HootingYard/Hooting_Yard_On_the_Air_-_November_8th_2007_fixed.mp3 (Hooting_Yard_On_the_Air_-_November_8th_2007.mp3) [snip] Using HOOTING_YARD___OCTOBER_6000.MP3;1 for HootingYard/Hooting_Yard_-_October_6th_2007.mp3 (Hooting_Yard_-_October_6th_04.mp3) mkisofs calculate size command: ----------------------- /usr/bin/genisoimage -gui -graft-points -print-size -quiet -volid HootingYard -volset -appid K3B THE CD KREATOR (C) 1998-2006 SEBASTIAN TRUEG AND THE K3B TEAM -publisher -preparer -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-glyn/k3bfCW2Fb.tmp -rational-rock -hide-list /tmp/kde-glyn/k3bzHHBec.tmp -joliet -joliet-long -hide-joliet-list /tmp/kde-glyn/k3brwA0uc.tmp -no-cache-inodes -full-iso9660-filenames -iso-level 2 -path-list /tmp/kde-glyn/k3bveJ6fa.tmp mkisofs command: ----------------------- /usr/bin/genisoimage -gui -graft-points -volid HootingYard -volset -appid K3B THE CD KREATOR (C) 1998-2006 SEBASTIAN TRUEG AND THE K3B TEAM -publisher -preparer -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-glyn/k3bzbwN7a.tmp -rational-rock -hide-list /tmp/kde-glyn/k3b0quX9a.tmp -joliet -joliet-long -hide-joliet-list /tmp/kde-glyn/k3bNHqsoa.tmp -no-cache-inodes -full-iso9660-filenames -iso-level 2 -path-list /tmp/kde-glyn/k3bhKcH7b.tmp