Re: Another crash -- the truth

Andries.Brouwer@cwi.nl
Fri, 5 Dec 1997 20:23:15 +0100 (MET)


Hmm - I wasted some more time to find out exactly what happens.
1. It is not Redhat related - my own 2.0.31 also crashes after
copying 100MB or so if I do "cp -a /cd /elsewhere".
2. It is not kernel related: 1.3.80, 2.0.29, 2.0.31 crash in the
same way.
3. It *is* CD-ROM related: copying other CD-ROMS gives no problems.
Also the second RH 5.0 CD-ROM is fine.
4. But this bad CD-ROM can be read fine on other machines.

Conclusion: I have a marginal RH CD-ROM, perhaps a little scratched,
or faulty in some other way, but most CD-ROM readers, perhaps using
their error-correcting capabilities, have no problems reading it.
One single CD-ROM reader however, perhaps old and dusty itself,
times out when reading it, usually after about 100 MB.
As soon as an error occurs Linux crashes - the SCSI subsystem,
perhaps especially the Adaptec 1542 part, is not able to handle
errors.

So, I mounted this CD-ROM on another machine, and then installed
over NFS, and all was fine. (I'll leave the nitpicks to a RedHat
conversation instead of the kernel list.)

Andries