On Tuesday 15 November 2011 23:35:53 Gianluca Cecchi wrote: > - I'm going to check tomorrow about AVT current configuration as noted > inside one of the answers. > BTW: on the storage array there are snmp traps configured. > After enabling multipath and rebooting the system, I still see the > trap below, sent by the storage (only one)... Could it be related to > this kind of configuration option at storage side? > > Here the snmp message > Summary > Node ID: XXXX_DS4700 > Host IP Address: > Host ID: Out-of-Band > Event Error Code: 4011 > Event occurred: 15-nov-2011 14.49.36 > Event Message: Logical Drive not on preferred path due to ADT/RDAC failover > Component type: Controller > Component location: Controller in slot B Yes, this is because the rdac module detected the LUN in AVT mode and refused to work with it. This will happen every time you access a ghost path without rdac. > - On the presented LUN I configured a PV, VG, LV and ext4 fs (not system fs) > At reboot at host side I see messages related to duplicated PV IDs for > the paths (sdb, sdc, sdd, sde): they comes before vg activation and > before multipathd start... > Is this normal, because at the first vgscan run during boot, multipath > configuration has not been instantiated yet..? > I have to check, but I don't remember similar messages with eh el 5.7 > in other SAN configurations, where the VG is not a system VG.... You should avoid to access the sdX directly. If you need to run lvm before multipath is up, you can blacklist the sdX in the lvm.conf. regards, Johannes -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
