Hi, I am experiencing data miscompare during verify with FIO after random write Also the time for the random I/O operation is lesser than what it takes for sequential I/O operation for the same 5%. So wanted to ensure 1. If I am missing the essential parameters to be passed to FIO 2. If any parameters passed are not essential Parameters for Write: sudo fio --thread --minimal --ioengine=libaio --numjobs=1 --exitall_on_error --filename=/dev/nvme0n1 -o /tmp/nvme0n1_temp.log --name=bs65536_rwrandwrite_qd3 --buffer_pattern=64206 --iodepth=3 --write_bw_log=/tmp/nvme0n1_bandwidth.log --log_avg_msec=1000 --max_latency=30s --continue_on_error=none --size=5% --percentage_random=50 --bs=65536 --randseed=1234 --rw=randwrite Parameters for Verify: sudo fio --thread --minimal --ioengine=libaio --numjobs=1 --exitall_on_error --filename=/dev/nvme0n1 -o /tmp/nvme0n1_temp.log --name=bs65536_rwrandverify_qd3 --buffer_pattern=64206 --iodepth=3 --write_bw_log=/tmp/nvme0n1_bandwidth.log --log_avg_msec=1000 --max_latency=30s --continue_on_error=none --size=5% --percentage_random=50 --bs=65536 --randseed=1234 --rw=randread --verify=pattern --verify_pattern=64206 The message from fio looks as below fio: got pattern '00', wanted 'ce'. Bad bits 5 fio: bad pattern block offset 0 pattern: verify failed at file /dev/nvme0n1 offset 86291775488, length 0 fio: verify type mismatch (0 media, 18 given) fio: got pattern '00', wanted 'ce'. Bad bits 5 fio: bad pattern block offset 0 pattern: verify failed at file /dev/nvme0n1 offset 86291906560, length 0 fio: verify type mismatch (0 media, 18 given) Regards, Gnana
