ceph/doc/dev/osd-class-path.rst

   1 =======================
   2  OSD class path issues
   3 =======================
   4
   5 ::
   6
   7   2011-12-05 17:41:00.994075 7ffe8b5c3760 librbd: failed to assign a block name for image
   8   create error: error 5: Input/output error
   9
  10 This usually happens because your OSDs can't find ``cls_rbd.so``. They
  11 search for it in ``osd_class_dir``, which may not be set correctly by
  12 default (http://tracker.newdream.net/issues/1722).
  13
  14 Most likely it's looking in ``/usr/lib/rados-classes`` instead of
  15 ``/usr/lib64/rados-classes`` - change ``osd_class_dir`` in your
  16 ``ceph.conf`` and restart the OSDs to fix it.