On Mon, Apr 25, 2016 at 7:47 PM, Stefan Lissmats <stefan@xxxxxxxxxx> wrote: > Hello again! > > I understand that it's not recommended running osd and rbd-nbd on the same host and i actually moved my rbd-nbd to a completely clean host (same kernel and OS though), but with same result. > > I hope someone can resolve this and you seem to indicate it is some kind of known error but i didn't really understand the github commit that you linked. Yes, it is a bug. rbd-nbd code expects writes to have rval (return code) equal to the size of the write. I'm pretty sure that's wrong, because rval for writes should be 0 or a negative error. I think what happens is your writes complete successfully, but rbd-nbd then throws an -EIO to the kernel because 0 != write size. I could be wrong, so let's wait for Mykola to chime in - he added that check to fix discards. Thanks, Ilya _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com