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14:45:15.100315255 -0700 >> +++ /var/tmp/fstests/generic/521.out.bad 2025-10-21 10:33:39.032263811 -0700 >> @@ -1,2 +1,668 @@ >> QA output created by 521 >> +dowrite: write: Input/output error > Hmm that's strange. Can you try running the above command with > prep.fsxops that I've shared. You'll need to pull the fsx atomic write > changes in this patch for it to work. I've been running on non atomic > write device btw. JFYI, I can see this issue with v6.18-rc2 and generic/760 I'll investigate...