By default you would need to do a custom installation to split apart anything, but as far as Local SSD versus SAN storage, there's not much you can separate. The bulk of the 'storage' space is within the DB, which is what needs the fast local disk. You could put backups on the slower SAN array, but space-wise it's not that much, and is what backups are for (can be scripted with a CRON job, etc to move the nightly backups off to somewhere else).
The critical thing is that whatever you do, make sure the active partition housing the database has the DiskIO required in the hardware requirements.