DATABASE ARCHITECT OF AN SAP

Explain how to layout or architect an SAP database server in terms of data, logs, and so on, to achieve the best performance:

(looking for: keep data and logs on separate spindles, RAID 1 or 1+0 best, separate data in discrete data and index volumes, move logs to separate high performance RAID 1 drive pairs, prefer hardware RAID to software/OS RAID)

Confused? Feel free to ask

Your feedback is always appreciated.I will try to reply Ur queries as soon as time allows.
Regards,
SAPhelpdesk