If I only had 1 pair of 15,000 RPM SAS drives in RAID 0 to dedicate to a VM box, would it be best to
a) put the HOST OS on the raid drives and put the VM's on a single SATA 10,000 RPM drive
b) put the VM's on the raid drives and the OS on the SATA 10k drive.
c) Put both the OS and the VM's on the SAS RAID and forget about the SATA 10k.
If so, why?
Not asking for benchmarks here, just some logic of what would theoretically be best on a small-scale low-traffic VM box.