partition question

Hi
I have an exam question which is below and I am looking for answer of this question:
I would appreciate your help.

  • You are the systems administrator of a mail server that services approximately 3,000 users. 2,000
    users access their email via a POP-3 service, while the remaining 1,000 users access their email via a
    Unix mail reader. Recently users have complained about speed of disk access, so a new 10 gigabyte
    disk has been purchased for the mail server to go with the other 10 Gb disk already in place.
    How would you partition out /var with these two separate 10 gigabyte disks? Note, these disks will
    be on the same SCSI controller, but will not overload the SCSI bus in any way.