> > Only once fully formated (which > >takes 1 hour for 1x media), DVD-RW permits for random write, but with > >32KB granularity. Latter means that you either have to have special > >kernel driver which would arrange for 32KB granularity or modify file > >system code to do same thing. Now note that no work (at least no visible > >outcome so far) has been done to accomplish either of these two > >alternatives under Linux (or any other Unix implementation), [presumaly] > >because it's damn hard. > > So DVD+RW drives do things in firmware what you need to do in the kernel > if you like to have 2k granularity with DVD-RW. But this is nothing a new > firmware could not support.
Specifications are very explicit about I/O granularity in DVD-RW Restricted Overwrite mode. You seem to be willing to bend standard to suit you, it's not fair play. Secondly it doesn't really matter what one *could* *possibly* do [to stretch something to something else], does it? > Note that the kernel also first reads a 512 byte sector from a hard disk > if you like to write only 64 bytes. Yes. But as already implied, if you want to extend this to 32KB to accomodate DVD-RW Restricted Overwrite, you have to modify kernel file system driver. The question was "why is there random access possibility for DVD+RW, but not for DVD-RW?" A. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
