some other burning questions

[John]

Bo Rosén wrote:
> I know that I can use growisofs -Z /media/cdrom /dev/null to overwrite
> the previous contents of a +rw disc, but this still leaves a filesystem
> on it. Can dvds be 'unformated'? It's not something I need exactly,
> mostly curious.
> 
> I've also tried writing a set of files with mkisofs to hd as an iso, but
> can't make it work. I've tried various ways, but only get messages like
> these
> 
> brosen at Delirium:~ $ mkisofs -o tmp/ temp/*
> INFO:   ISO-8859-1 character encoding detected by locale settings.
>         Assuming ISO-8859-1 encoded filenames on source filesystem,
>         use -input-charset to override.
> mkisofs: Is a directory. Unable to open disc image file
> 
> 
> brosen at Delirium:~ $ mkisofs temp/* tmp/  writes to sdout, ie the screen 
> 
> and 
> 
> brosen at Delirium:~ $ mkisofs temp/* tmp/my.iso
> INFO:   ISO-8859-1 character encoding detected by locale settings.
>         Assuming ISO-8859-1 encoded filenames on source filesystem,
>         use -input-charset to override.
> mkisofs: No such file or directory. Invalid node - tmp/my.iso
> 
> Cheers,
> 	Bo
> 
> 

mkisofs -o /tmp/myiso -r -J temp


More advanced:
mkzftree temp /tmp/workhard
mkisofs -o /tmp/workhard.iso -R -z -udf /tmp/workhard

Note that this one does not make portables ISOs.  Sometimes that doesn't 
matter. Also, some care is needed to create bootable ISOs this way:;;;;;-)


I discovered the other day that -udf can be necessary. I was creating 
ISSOs containing gigabyte-sized files and the resultant DVDs were coasters.