Arrangement of Oracle installation on disk drives

Question

I've got 4 disk drives on the system
where I want to install Oracle server.
On 1. drive I want to install operating system
+ archived redo logs
on 2. drive Oracle server binaries,
on 3. drive datafiles + control file
on 4. drive undo tablespace + redo logs + temporary
tablsp.
My question is: can I multiplex control file
and redo log files on disk No. 2, where there
is Oracle server installed? Oracle recommends
server binaries and databases to be on different
disks, can there be any problems with such an
configuration concerning this recommendation?
Thanks for advise, ...

Answer 1

Yes, you can multiplex control files on a single disk. I have a dev database with 6 control files on the E drive, which is just a partition of my C drive really. (Why, because in production my E drive is a 1 TB LUN consisting of 25 disks.) You can do the same for your on-line redo logs. Oracle RECOMMENDS they be on separate phyiscal devices. If you lose the device, you lose all copies. It's just a recommendation, not an enforced requirement.
That aside, I don't like your file layout at all. Why waste a whole spindle on the Oracle binaries. Very little I/O compared to other file types. I would put the O/S and Oracle binaries on the same disk, along with part of your pagefile. Now, use the spare disk to spread out your remaining I/O.
-Mark