DVD writing oddity
D. Hugh Redelmeier
hugh at mimosa.com
Mon Jul 12 06:22:13 UTC 2010
I have a shell script that I've been using for years to burn ISO
images. I just tried it with Fedora 13, and it acted up in an odd
It burnt a DVD+R with this command:
growisofs -Z /dev/cdrw=/mnt/space-1500/tmp/08mythburn.iso -use-the-force-luke=notray -use-the-force-luke=dao
When that completed (successfully, it turns out), it executed this
command to check the result:
cmp --bytes 4291420160 /mnt/space-1500/tmp/08mythburn.iso /dev/cdrw
This command failed with this message:
cmp: /dev/cdrw: No medium found
In other words, the drive didn't seem to have a disk in it, or at
least not one that could be read as a raw bytestream.
The script ejected the disk; I inserted it again; I ran the cmp again
and it worked.
This has worked in the past. Why does it not work now?
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