Re: Oracle & Hardware RAID.

Using Raid-5 is a *bad* choice for Oracle. Refer to the following link
http://www.ipass.net/~davesisk/oont_performance_raid.htm

for a thorough explanation of this issue. I have been working at sites with RAID-5 several times, and the performance invariably was way below what to expect.

Regards,

Sybrand Bakker, Oracle DBA

"graeme.lockhart" <graeme.lockhart_at_ntlworld.com> wrote in message news:qF5D5.16295$L12.319956_at_news2-win.server.ntlworld.com...
> Although I am not really in the oracle field (NT Systems Manager) I hope
> someone can help with my query.
>
> We have a oracle database that currently resides on an aging external
> Clariion Raid cabinet. The DB is spread over several disks configured as
> RAID 10 and RAID 1. This set-up was chosen several years ago as the best
> set-up for oracle to run.
>
> Recently we purchased a new server with inernal RAID capabilities. As the
> exteranl cabinet is now quite old I would like to propose to our DBAs that
> the DB is installed on the internal RAID disks. However as there are only
 8
> disks (although more capacity) I do not think it is practicle to pick the
> RAID levels as described above. I would like to configure the hardware
 RAID
> at level 5.
>
> What I would like to know is what is generally is the best RAID
> configuration for Oracle DBs is it striping/mirroring or can you use
> stripe/parity without major performance degradation
> Thanks in Advance
>
> Graeme Lockhart
>
>
Received on Thu Oct 05 2000 - 17:12:22 CDT