(this note might be a repeat - notice I previously had email formatted as HTML - probably put ended up in bitbucket) I have an issue replaying an blktrace which contains trim operations. It results in an assert failure: > fio: fio.h:552: fio_ro_check: Assertion `!(io_u->ddir == DDIR_WRITE && !((td)->o.td_ddir & TD_DDIR_WRITE)) && !(io_u->ddir == DDIR_TRIM && !((td)->o.td_ddir & TD_DDIR_TRIM))' I posted a detailed explanation and a simple patch in https://github.com/axboe/fio/issues/771, along with a pull request. Can someone please take a look? Thanks Kris Davis