On 18.09.2013, poma wrote: > [1] https://patrick-nagel.net/blog/archives/337 Discard takes time, of course. I run two OCZ Vertex 4 drives, and deleting a complete kernel sourcetree doesn't take 40s with blocked I/O on my systems (XFS filesystem, mounted with "discard"). I guess this is mainly dependend on the controller firmware of the SSD.