On 14 August 2015 at 16:58, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 08/14/2015 09:47 AM, Jens Axboe wrote: >> >> On 08/03/2015 03:12 PM, Sitsofe Wheeler wrote: >>> >>> Hi, >>> >>> I've noticed that when running fio in server mode it's not possible to >>> get a dump of using verify_dump when a verify mismatch occurs. Is it >>> possible to add a mode where the server process saves the mismatch >>> files to its current working directory for inspection later? >> >> >> That sounds like an oversight. To save time, can you let me know how you >> are invoking fio and with what job file? Should not be that hard to >> fixup, it should just work. > > > Just tested this, and the fio backend does dump the files if verify_dump=1 > is set: > > [...] > <lenny> write3: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, > iodepth=1 > <lenny> Starting 1 process > <lenny> crc16: verify failed at file file offset 2023424, length 4096 > <lenny> Expected CRC: 5b54 > <lenny> Received CRC: c1aa > <lenny> received data dumped as file.2023424.received > <lenny> expected data dumped as file.2023424.expected You're absolutely right. I think I got fooled because of two things: 1. I was trying to use dd to stomp zeros while also using the sync ioengine on a file in /dev/shm and just getting a file I/O error. 2. If fio encounters an error while trying to read the header (even if the blocks are all of the same size) it doesn't dump anything at all (even in non-server circumstances)... -- Sitsofe | http://sucs.org/~sits/ -- 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
