don't apply patch 00008+ in udm patch-set : they break the dm event subsystem regards, cvaroqui Selon "Caushik, Ramesh" <ramesh.caushik@xxxxxxxxx>: > > I am trying to use multipath-tools version 0.2.7 on a system running > 2.6.6 kernel with the 2.6.6-rc2-udm1 dm patchset. The system has dual > port Qlogic 2312 controller, connected to a JBOD through a FC switch. I > have the multipath drives configured as follows > > - path_grouping_policy multibus > - getuid_callout /bin/scsi_id -g -s > - path_checker tur > > I start multipathd; run multipath; run kpartx on a partioned drive dm-7 > (this results in additional devmaps dm-11 & dm-12); I then run bonnie++ > on the partition dm-11. While bonnie++ is in progress I disconnect one > of the FC ports from the switch. I expect > > -- the path switch to happen and the failed bios to be retried so the > application can run after a delay. > > I find that the application waits for a long while, reports an I/O error > and quits. The behaviour is not different with other applications that > access the drive. > Is this supposed to work ? What could be the problem here ? > > Secondly I connect the port back to the switch. I expect the path > re-connect to be discovered and the multipath device map to be restored. > But subsequent disk I/O through the same devmapped device (dm-11) sends > data only through one port (one that has always been connected). The > path restoration does not happen. Do you have thoughts on these. > Appreciate your feedback on this, > > Ramesh. > > > --