vm backup ,route disk problem

hi

i want backup a vm machine, The3disc with (different capacities)and(different storage disk group).

Namely, 2 disk on disk group eva1 and 1disk on diks group 2 eva2  ((all lun present on DP 7.00 Server));

But onlyoneroute backup &restore .((2 disk on disk group eva1 ));

my job is ok  and full backup from vm machiens.

tnx