On Wed, Jun 01, 2022 at 10:19:40PM +0200, Holger Hoffstätte wrote: > Obviously if anybody (Jens, Christoph..?) has an idea what changed this > behaviour and thinks it's a bug I'm more than happy to test a fix, > however for now I'd be happy to understand what's going on. I just tested fsync on SCSI disk and NVMe SSDs and they make it down perfectly fine to the driver and device as Synchronize Cache / Flush commands, including the block device node for a partition. Everything else would be really horrible for data integrity anyway..