My RedHat 5.1 ES server (actually it is that but rebranded as Oracles latest Linux) is logging this in /var/log/message all the time. It is attached to a Hitachi SAN device. All seems to be working OK, but these errors go on and on. Don't get what they mean? May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:0 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:16 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:32 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:48 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:64 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 65:80 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 8:0 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 8:16 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 8:32 May 16 19:48:01 wpe01 multipathd: error calling out mpath_prio_hds_modular 8:48 Craig -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel