Firstly I think this is more suitable for debian-user, so I'm BCCing -devel and CCing -user. Please CC me on any follow-ups.
On Wed, 17 Oct 2001 15:27, Steven Mooij wrote: > Hello, I'm not a debian developer (yet), but I hope I am allowed to post a > message here. It is about a potential bug, but I can't send it with the > BTS, because I don't know which package to file it against. Firstly what you are describing isn't a debian bug so is not suitable for the BTS. It's either a kernel issue or a hardware issue. > On Wed, 17 Oct 2001 00:58:59 Russell Coker wrote: > > Also there's this new "tainted kernel" thing which is a huge new feature, > > and > > there are rumours about Ext3 FS corruption and data loss.. > > Maybe my problem has something to do with these rumours, maybe not: When I > copy large amounts of data sometimes some bytes are changed. This must > sound vague: sometimes, some bytes, but unfortunately this is the case, I > haven't figured out a reproducable test-situation. Firstly create a file with a variety of data that's significantly larger than ram. Eg: tar cvf /tmp/junk /usr Then run md5sum repeatedly on it in the following fashion: while /bin/true ; do md5sum /tmp/junk ; done > /tmp/out Leave that running overnight and then run the following in the morning: uniq < /tmp/out If it gives more than one line of output then your hard drives are not repeatedly returning the same data to read requests. There is a potential problem that this error may only occur on certain parts of the hard drive. Booting with init=/bin/sh and running the following could be useful in that case: while /bin/true ; do md5sum /dev/md1 ; done Doing that all night shouldn't exhaust the kernel scroll-back buffer. Then if that doesn't show anything then you have to try repeatedly copying a file and using md5sum to check the result (should be the same after every copy). > 2628DB Delft If your machine is portable I could meet you at a HCC or NLLGG meeting and check it out. Send private mail if that interests you. -- http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/projects.html Projects I am working on http://www.coker.com.au/~russell/ My home page