On Mon, Feb 03, 2003 at 10:53:08PM -0000, Bodrogi Viktor wrote: > > Seems interesting. > I forgot to mention (yes, sorry, it's important piece of information), > that I have RAID 1 (mirrored disks), so HW problem is less possible. > And I have reiserfs partition on the mirror too, without any problem. Raid protects you against disk failures. It does not protect you from cable problems causing data corruption, or your RAID controller going insane. Unfortunately a lot of people seem to believe that just because they have RAID, they are immune from hardware problems, and then stop doing backups. I usually hear from them after they've gotten screwed, and when they ask if I can perform miracles.... In any case, the scenario I described (a controller/cable problem, or an incorrectly configured IDE DMA settings) are all still possible with RAID; RAID does not help you prevent these sorts of problems. As far as your not noticing the problem with reiserfs that could be because you've been lucky, and not noticed because the block addresses causing the problem do not (yet) contain data. But the symptoms you've described sound very much like hardware induced errors. > Anyway, do you have an idea how to test for HW errors? Well, if you have a scratch partition that's not being used, you can try using the badblocks program. Try using the -w option, which will do a read/write test. This doesn't do a random access test, so it might not detect any problems, though. I'd suggest checking your internal cabling, and replacing the controller cable if it looks dubious. Making everything is well plugged in, too. Good luck! - Ted _______________________________________________ Ext3-users@redhat.com https://listman.redhat.com/mailman/listinfo/ext3-users
