Re: assertion failures

Bill Pemberton
2010-02-26T20:43:21Z

> >
> > Yes, the array has a writeback cache.
>
> Ok, this would be my top suspect then, especially if it had to be
> powered off to reset it. The errors you sent look like some IO just
> didn't happen, which the btrfs code goes to great length to
> detect and complain about.
>

While the arrays were powered off in both cases, it was well after the
original problem was observed, so I would have expected the array to
flush the cache by then.

In any event, the biggest issue is that I'm left with a totally
unrecoverable filesystem. On these filesystems I can live with
"something strange happened and you lost some files", but in this case
it's "something strange happened you lost 1TB".

--
Bill