Accessing a Sun StorageTek 6140 array with multipathing (failover) via Fiberchannel from a Linux host is not so easy (You'll dream about having scsi_vhci MPxIO out of the box in Linux...).
First: The Sun StorageTek 6140 does not support symmetric multipathing - only one path and controller is active for a given volume. When trying to access the volume on another path SCSI errors are the result. So the failover code has to talk to the array if it whishes to change the active path.
Second: Linux (with actual Q-Logic drivers) offer two multipathing strategies and none of them is usable with this Sun arrays:
First: The Sun StorageTek 6140 does not support symmetric multipathing - only one path and controller is active for a given volume. When trying to access the volume on another path SCSI errors are the result. So the failover code has to talk to the array if it whishes to change the active path.
Second: Linux (with actual Q-Logic drivers) offer two multipathing strategies and none of them is usable with this Sun arrays:
Continue reading QLA Linux and RDAC - Sun 6140 Failover.
