Incredibly slow restore rates in 2012 vs 12.5

Hi,

We've just upgraded from 12.5 to 2012 VRAY.

Trying today to restore a 10mb file and a 725k file from last weeks BE 12.5 disk backups.

The 10mb file took 3 hours and the 725kb file took 1 hour, on the same hardware as before - a 21mb file from the same disk backups a fortnight ago took under 3 minutes!

Any ideas how to sort this?

Peter