On 11/08/09 02:42, Lars Tunkrans wrote: > Hi, > > When useing a SAN a particular LUN can be visible across the SAN > multiple times via multiple > controllers in addition to being visible through both the Primary Control > LDOM and the Secondary I/O LDOM. > Thus my LUN is available through 4 paths . 2 paths from each I/O > LDOM. (this is a T5240) > > If I configure all four paths in a Disk multipathing group , > > Can I find out which path is used ? > Can I set up a prefered path ? > How does the hypervisor select the active path ?
Multipathing is not managed by the hypervisor but by the vdisk driver (vdc). Currently the vdisk driver selects paths based on the order they were added in the configuration (when using the ldm add-vdsdev command). Currently there's no simple way to see the active path, and it is not possible to switch to other another path or to set up a preferred path. If you are interested by this feature, please add yourself to RFE 6884925 (vdisk multipathing should provide options to manage paths). alex.
