limit storage pools to one at a time

I have my bakcup jobs during the week goign to two different disk drive arrays.  I want to limit my backup server to only run one job at a time to the storeage pool.  I can do that with each individual disj drive array but not to the storage pool.  is there a way to do this?  Myb issue is that BE 2012 will run mutiple jobs at once and that brings my whole throughput down drastically. If there is no way of doing this would the job run faster if i used differnet NICs for the jobs?  Thanks.