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a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u9kbVW1HyeK8m07tLXsA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 cc=ntf awl=host:13657 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA1MDA2MyBTYWx0ZWRfX5LjXB49VQcCg IAbCVyX27RQp4d9y2pa5Y3RWc2/rxgLrOT3MyPkb7kFY+A7fecTiGfAz8xQwdDkW5xrMrqH5j9y DQhaxg/nqs0oQ8BA8+YPzBDFd7uUW2MNvhgeoI76kDK2VCNSE5ta+o0FvOSSIlWCbemz62+iV0r EWL10AM5ge9vM0y9HY3f1difcjB80n7J9hTesd6xWEPsgHtmyzlCS0l/E5gCMX0eZ5kvGA2uTTn QSGNFJxYVRLzNTydcjX1M0Dl2DzeV4CNI5UMvocgI9vKXeBM+4Fjk+vxv8XYaO+16CFHvJkMEXn NLdOm7Q0AEICCyKU8r3s6caW5pmNMm6poQYOA0KBdQ4RU2oUGW5topcyK7LqOVnIK7y1lOwni7a gu1ERDtf3MCd3dlt781Dml+bH25QYLdUFRtGNEJ0iR8RW9Kirok= X-Proofpoint-ORIG-GUID: 2PFdT4xmP2Dhaf_L_MAzH2AGM0qbv88_ On 05/11/2025 10:39, John Garry wrote: > > +fio: failed initializing LFSR >     +fio: failed initializing LFSR >     +fio: failed initializing LFSR >     +fio: failed initializing LFSR >     +verify: bad magic header 0, wanted acca at file /home/ubuntu/mnt/ > scratch/test-file offset 0, length 1048576 (requested block: offset=0, > length=1048576) >     +verify: bad magic header e3d6, wanted acca at file /home/ubuntu/ > mnt/scratch/test-file offset 8388608, length 1048576 (requested block: > offset=8388608, length=1048576) > > I need to check that fio complaint. This issue goes away when I stop using lfsr, i.e. the test passes. The problem is that lfsr init in fio does not have enough "blocks", and this comes from how the fio bs is same as the increment aw_io_inc, both 1M in my case. I think that aw_io_inc needs to be much lager than bs. BTW, I think that the random number gen fio param is only relevant in fio write mode. It seems to be even set in 774 for verify read. Thanks, John