Re: Huge values of mismatch_cnt on RAID 6 arrays under Fedora 18
From: Piergiorgio Sartor <hidden>
Date: 2013-01-28 19:22:56
From: Piergiorgio Sartor <hidden>
Date: 2013-01-28 19:22:56
On Mon, Jan 28, 2013 at 08:10:41PM +0100, Wolfgang Denk wrote: [...]
etc. etc. [The test is still running, but I already have more than 10k such lines...]
Hi Wolfgang, please grep for "Error".
What does this tell us?
There are for sure parity errors, but it would be more interesting to know (that's why "Error") if a specific device has/had problems.
Note: on one system (where I can recreate / rstore the content of the array more easily) I decided to play some experiments, so I ran a "repair" on the array. The repair completed without any error indicateion - but ended with a mismatch_cnt = 362731480.
I guess this is expected, the "repair" has the parities fixed, nothing more, while reporting how many fixes.
My simple tests still ndicate no data corrption (but then I might just be looking in the wrong places).
Well, this might be possible, even if I would not count on it... bye, -- piergiorgio