Jens, I still see some verify errors when I set 'experimental_verify=1' verify: bad magic header 977c, wanted acca at file /tmp/test offset 15478784, length 429437046 verify: bad magic header 8aac, wanted acca at file /tmp/test offset 28082176, length 302426815 verify: bad magic header c8ad, wanted acca at file /tmp/test offset 30408704, length 318473336 verify: bad magic header 3791, wanted acca at file /tmp/test offset 65024000, length 74750452 However, without this line, there are no verify errors anymore. The fio file is: [stress] filename=/tmp/test size=107374182 readwrite=randrw bssplit=4k/50:1M/50 ;bs=64k do_verify=1 experimental_verify=1 verify=meta verify_interval=64k verify_dump=1 continue_on_error=verify Thanks a lot, Gwendal. On Mon, Jul 21, 2014 at 11:52 AM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 2014-07-21 20:40, Jens Axboe wrote: >>> >>> But looking at the code, it won't be possible to fix, because we can >>> not guarantee to always have 16 4K write contiguous. >> >> >> As mentioned in the original email, it's a parser fix. verify_interval >> cannot be less than the minimum block size, fio will just have to catch >> that and adjust / error out. > > > Attach should fix that - untested... > > -- > Jens Axboe > -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html