DSF_SCRUB_PAUSED
scn->scn_phys.scn_flags |= DSF_SCRUB_PAUSED;
scn->scn_phys_cached.scn_flags |= DSF_SCRUB_PAUSED;
scn->scn_phys.scn_flags &= ~DSF_SCRUB_PAUSED;
scn->scn_phys_cached.scn_flags &= ~DSF_SCRUB_PAUSED;
scn->scn_phys.scn_flags & DSF_SCRUB_PAUSED);
scn->scn_phys.scn_flags &= ~DSF_SCRUB_PAUSED;