Phillip Susi <[email protected]> writes:
> Peter Osterlund wrote:
> > The variable is unsigned, so it supports values up to 255, ie no need
> > to change it.
>
> The packet length is read and left shifted by two before being stored
> in that variable to convert it from 2048 byte sectors to 512 byte
> sectors, thus a value of 128 overflowed and became zero. be32_to_cpu
> returns a 32 bit value so I figured it should be stored in a 32 bit
> variable, not an 8 bit one.
OK, it makes sense if you can make packets larger than 64KB. I didn't
know you could.
> > The current limit is 32 disc blocks, ie 64KB or 128 "linux sectors".
> > How do you make the packet size larger for a CDRW disc? Just changing
> > the constant is not going to help unless you can also format a disc
> > with larger packets.
>
> I also have several patches to the udftools package, one of which
> documents ( in the man page ) the previously undocumented -z
> packet_size parameter to cdrwtool, and fixes the code so that it
> actually works with values other than 32.
OK, so it appears you can make packets bigger than 64KB. Can I please
have those patches so I can test this myself.
> The upstream project for udftools on sourceforge appears to be dead.
> I have sent email to the two original authors and had no reply, and
> the CVS repository has not been touched in over a year, and the
> mailing list is dead. I am not sure what I should do about that, but
> in the mean time, I am maintaining ubuntu specific patches and have
> been speaking to the debian package maintainer about merging them
> there as well.
I'm not sure either what to do if the project admin (Ben Fennema) is
no longer online so he can transfer maintenance to someone else.
> > Might be a good idea. On DVD discs the block size is only 32KB, so
> > half of the allocated memory is unused.
>
> Why is it only 32 KB on a dvd? What utility was used to format it
> like that?
According to
http://fy.chalmers.se/~appro/linux/DVD+RW/
"... native DVD ECC blocksize, which is 32KB"
--
Peter Osterlund - [email protected]
http://web.telia.com/~u89404340
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