>From: Volker Kuhlmann <[EMAIL PROTECTED]> ....
>(I scripted that a long time ago). In the mid nineties it was necessary >to use cdrecord -pad to make linux read all the files, described as >read-ahead bug in linux's iso9660 driver in the cdrecord man page. When >I checked again a few years ago it was still necessary to use -pad, so >I kept on always using it as a matter of course. This year I find that >cdrecord -pad is no longer enough, and the same problem shows up again. >It affects cds and dvds, and all pressed commercial cds cerated on >non-linux systems. The problem shows up at varying degrees, I suspect >it has to do with the modulus of the number of filesystem blocks of the >particular disk. Several times I was unable to completely read the >filesystem from cds, I/O error 2 or more blocks beore its end no matter >what I did. Often it helps to use dd skip= to only read the last 10 >filesystem blocks, and it works. Reading all filesystem blocks from the >beginning, or from a suitably large distance from the end - I/O error. >Sometimes the problem goes away when turning DMA off for the cd/dvdrom >drive, but that is not an acceptable way of running it. I really doubt >it's hardwaredependent, as I have seen it on 3 totally different >machines now. Kernels 2.4.19, 2.4.20. It doesn't help that read >problems on a cd/dvd can cause the IDE bus, if not the system, to lock >up for some time. Appending 2MB of zeroes to the disk image file before >burning makes it disappear reliably. I keep on wasting CDs because I >forget to append that dummy data. This is wrong. There is no need to use -pad! If you use unapropriate software like "dd" and don't even send a problem report, it is impossible to help you :-( http://www.fokus.fhg.de/research/cc/glone/employees/joerg.schilling/private/problems.html mkisofs now adds paddinf for a long time .... Unfortunately, the Linux kernel hackers constantly add new bugs to the kernel :-( It would really be nice if they woutl start to listen to people who know how to do things right. J�rg -- EMail:[EMAIL PROTECTED] (home) J�rg Schilling D-13353 Berlin [EMAIL PROTECTED] (uni) If you don't have iso-8859-1 [EMAIL PROTECTED] (work) chars I am J"org Schilling URL: http://www.fokus.fraunhofer.de/usr/schilling ftp://ftp.berlios.de/pub/schily
