Dear Chris, In message <ADB1B276-21F3-4006-A613-F979F931EDC3@xxxxxxxxxxxxxxxxx> you wrote: > > > Correct, these are 3 different machines. > > Too bad. Better to test first, than commit so many computers and arrays > for such a major change. In hindsight you are of course correct. But then, these are still not really vitally critically systems, and I hve to admit that I did not expect such kind of problems. I have installed a large number of Fedora releases before (all of them since FC4 actually, on quite a number of systems), and while there have always been some problems, I never ran into something like this before. > Unclear. If parity chunks are both wrong, then that means you > effectively have partial RAID 0 depending on what parity chunks are > correct or not. I'm not recommending this, but if you set one disk to > faulty and started your file system and file tests again… if they're > bad then indeed it's parity that's affected. If you don't get errors, > then it indicates the test method is insufficient to locate the errors > and it could still be data that's affected. OK, I will keep this in mind. If needed, I can dedicate one of the systems to even a destructive test without too much actual loss. > It's a tenuous situation. It might be wise to pick a low priority > computer for regression, and hopefully the problem gets better rather > than worse. If the assumption is that the parity is bad, it needs to be > recalculated with repair. If that goes well with tests and another check > scrub, then it's better to get on with additional regressions sooner > than later. Again in the meantime if you lost a drive, it could be a > real mess if the raid starts to rebuild bad data from parity. Or even > starts to write user data incorrectly too. Well, I did this - the repair worked without errors, but it left again a huge mismatch_cnt; raid6check on this array has not found any problems so far - even though I see mismatch_cnt = 362731480 Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx O Staat! Wie tief dir alle Besten fluchen! Du bist kein Ziel. Der Mensch muß weiter suchen. - Christian Morgenstern -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
