You cannot create a RAID 1 pool/group from 4 disks. You will have to create 2 x 2 disk elements and then either concat or construct them at an os level.  Why is your DBA so adamantly opposed to any striping, does he/she even understand it or just reading from a potentially outdated Oracle BP document ? Is it currently best practice to avoid redo logs on R1/0 ? A quick check only turned up an old doc.  I'm not convinced all the effort and configuration you are proposing is justified, but I'm certainly not an oracle expert so happy to defer to anyone who is. You might consider getting some opinions from the experts here Everything Oracle at EMC
Hi,  I am going to assign a LUN of 1 TB disk space (4x 600 GB15k SAS disks available ) , this LUN should be on RAID 1 configuration and not applicable to the FAST-VP (auto-tier) ,,what is the best way to create a LUN of that size??  Should i create a separate pool contains the four SAS disks with RAID 1 ( but there is no option to choose RAID 1 in the pool creation) or should i create a RAID group then a traditional LUN from this group ( but how to get 1 TB from 4 disks in a RAID 1 group)  Your help is greatly appreciated.   Regards, Ahmad
1 TB RAID 1 LUN -VNX 5800