On 2015-08-25 10:26, Miguel Negrão wrote: > Austin S Hemmelgarn gmail.com> writes: > >> One comment I would like to make about this: I have heard numerous >> stories of OCZ brand SSD's having significant data corruption issues >> (along the lines of writes returning successful when they really failed, >> and blocks that are in use getting randomly erased) that can cause >> severe data loss and filesystem problems. While I do think that btrfs >> needs to be improved when faced with such things, I would not at all be >> surprised if the SSD was the root cause of the issue. >> >> > > > It did have some corruption through its 3 year life time. This was from one > month ago: > > sudo btrfs device stats / > > [/dev/sda5].write_io_errs 0 > [/dev/sda5].read_io_errs 0 > [/dev/sda5].flush_io_errs 0 > [/dev/sda5].corruption_errs 996 > [/dev/sda5].generation_errs 0 > > On the latest scrub that I took note of the results though, it didn't have > corruption: > > sudo btrfs scrub status / > scrub status for f2e4e4d3-2d8e-4764-a818-de9176405c4b > scrub started at Fri Apr 17 14:42:47 2015 and finished after 146 seconds > total bytes scrubbed: 66.10GiB with 0 errors IIRC, scrub (or at least the old versions) only reports the errors it finds, not cumulative ones (hence the device stats sub-command), so I'd still suggest being cautious.