Re: Status of UDF CD packet writing?

From: Brian Gerst (
Date: Wed Oct 09 2002 - 07:37:41 EST

lell02 wrote:
>>On Tue, Oct 08 2002, lell02 wrote:
>>>>Will Jens Axboes patch for CD packet writing for CD-R/RW make it in
>>>>before the feature freeze? I know Jens Axboe is busy with more basic I/O
>>>>stuff, but i sincerely hope it can be squeezed in before 2.6/3.0 is
>>>jens stated on this about 1-2 days ago. he said, it would be little
>>>modification on the ide-cdrom, to make it work with cd-mrw/ packet
>>>writing. so it could go in after the feature freeze.
>>You might be talking about two different patches -- one for cd-rw
>>support (this is the pktcdvd (or -packet) patch that Peter Osterlund has
>>been maintaining) and the other for cd-mrw. The cd-mrw patch is very
>>small, not a lot is required to support that in the cd driver.
>>Supporting cd-rw is a lot harder, basically you have to do in software
>>what cd-mrw does in hardware (defect management, read-modify-write
>>packet gathering, etc).
>>cd-mrw will definitely be in 2.6. cd-rw support maybe, I haven't even
>>looked at that lately.
> thanx for clearing out these differences.
> but, isn't cd-mrw supposed to replace the old packet-writing technique?
> so, in the end, there wouldn't be any need for packet-writing, if every burner
> ships with cd-mrw-support... i read in the "specs", that the technology would
> be much better.

For drives that support cd-mrw. Older cd-rw drives will still need the
full blown packet writing patch though.

				Brian Gerst

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