[ILUG] Re: More DVD prob's

[Jak]

I occasionally have problems reading DVDs, but as the only DVDs I
ever get are from PCPlus, I am not sure if it's their fault, Linux fault
or hardware. Since I have tried them on different drives, I think I can
discount hardware. I noticed that problems usually occur on DVDs
that cannot be mounted as UDF under Linux ( but Windows is happy
to say they are good UDF ). Using ISO9660, I hit an arbitrary filesystem
size limit in the Linux iso9660 driver - I can read the files on disk up to
2Gb, I think, but after that it's pot luck. So, if you are trying to read a 
4.5 Gb DVD mounted as iso9660, this could be your problem. I only 
mount them as ide-cd drives, so I don't know whether your error 
messages relate to the same thing. 
There was a long thread recently on kernel mailing lists about the
difficulties of identifying UDF filesystems, and possible confusion
between iso9660 and udf filesystems. I didn't try to understand it,
but it boiled down to the fact that DVDs can have UDF and iso9660
filesystems at the same time.
I don't know if this is anyway related, the problems I have are
intermittent, sometimes it works, sometimes not, even on consecutive
mounts.
				Jak


>I thought my problems were just movie related, but I just got the Linux 
>Format DVD version and was trying to copy the Debian 2.2r2 iso's and I'm 
>still getting read errors on my DVD drive. Does someone on this list 
>understand the following kernel messages?