So I've managed to use ceph-objectstore-tool to locate the pgs in 'unknown' state on the OSDs, but how do I tell the rest of the system where to find them? Is there a command for setting a the OSDs associated with a PG? Or, less ideally, is there a table somewhere I can hack to do this by hand? Mark Holliman Wide Field Astronomy Unit Institute for Astronomy University of Edinburgh The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.