This is a question regarding GFS native multipathing support: I have a typical redundant mesh topology -- 2 switches, 2 HBAs per host, 2 storage processors. I create the pool device per the procedure outlined in RedHat KB 4343 and then mount it locally. This works fine. However, if I trespass the LUN between SPs during a write operation, I lose all access to it. I have tried pool_mp with both failover and round robin policies. Here are my questions: 1. Is there any way to accommodate trespassed LUNs via pool_mp? 2. Do you need to do anything special (ie remount the LUN, run partprobe, etc.) to accommodate a trespassed LUN? 3. are the pool_mp policies primarily designed to accommodate front-end failures? (IE cables, HBAs, switch ports.) I am using qlogic 2340 HBAs, Brocade switches, and a Clariion CX400 array running R16. Many thanks, Jacob -- Linux-cluster@xxxxxxxxxx http://www.redhat.com/mailman/listinfo/linux-cluster
