|I think that should work OK. My question is this. Why do that? If you are running RAID 0 on the mostly false assumption that it will improve performance then leave things as they are and just add non RAID storage. |
Going back to the original question. You need to verify the 500GB drives will operate on your controllers. You may have SATA I controllers (assuming SATA) and some performance SATA II drives are NOT backward compatible.
Running the larger drives as one large array would IMO slow down performance compared to the 160s.
Unless you don't have additional drive ports I would recommend leaving things as they are and adding non RAID storage.
Additionally, I would make a note of EXACTLY where and how each 160GB is currently configured in case you need to restore the old array, should you decide to proceed.
Connect the new drives to the same ports as the old array.
Also, verify that your backups are good before proceeding.
BTW, you won't find many boosters of RAID 0 on this forum. At least you maintain backups. One last note is that I don't believe the 500s will be as fault tolerant as the 160s are. IMHO arial density increase has made the larger drives more prone to data loss. Head alignment is more critical than ever.