using cd rw drive
Dan Strick
strick at covad.net
Tue Jan 20 22:43:39 PST 2004
>>
> Can I format an rw cd with
>
> disklabel -w -r /dev/acd0c cd9660
> newfs /dev/acd0c
>
> and then use it just like an hard drive?
>
> Cp /etc/rc.conf /cdrom
>
> Or is burncd the only way to write to it?
>>
I don't know for sure, but I doubt this would work very well.
Two reasons:
1) You would probably have to somehow format the medium before using it.
As far as I know, the only mechanism used with CD-RW for random-access
defect management is something called "Mount Ranier". I don't really
know much about it, but some modern CD writers are advertised as
supporting Mount Ranier. This implies that most CD writers don't.
I would also expect that it requires special device driver support.
2) The CD-RW medium can only be rewritten a limited number of times,
something on the order of a thousand times or perhaps much less.
There are probably some well trampled blocks in a UFS file system
that would wear out very quickly.
Dan Strick
strick at covad.net
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