storage issue on SAN drive

[mahajanakhil198]

Hi we have recently bought HP Itanium servers with SAN storage.
Our data will reside on SAN storage and not on disks alongside server.
We have 8 SAN disks out of which 2 will be reserved for other usage.
Data has to be migrated from current server to this new server configuartion.
We have 4 datafiles containing user data that are heavily used and there are 4 index datafiles.
Taking into account system datafile, undo tablespace datafile, 3 copies of control file, 3 membered 3 group redo log config and archived logs, I want to place data on SAN storage that wud facilitate optimal I/O efficiency.

All I know about SAN is that it stripes data across various disks.Since tha data would be striped, so I am bit confused about how the datafiles and redo/archived logs should be placed on this type of storage.
I tried to figure it out on google but didnt get much.

[BV1963]

So you have 6 disks left, if you mirror them you have 3. I would striped accross all 3 of them .

[marist89]

do you mean 8 physical devices or 8 filesystems? In the SAN world it makes a difference. Is it hardware RAID or software RAID?

[mahajanakhil198]

I suppose it implements RAID 5 at hardware level. Out of 8 disks, 2 are reserved for storing sm parity information. In this way, even if we pull out 2 hard disks while running, the whole system will be unaffceted. The OR ing info on 2 reserved disks will make our system fault tolerant.
I ma not much sure of it.. Explaining what i got to know from the person who came to install the server.

[marist89]

I can't really tell what you've got from your description. The more physical spindles you have for your data, the better.