Re: Which RAID level?

Breno,

I don't believe it is so much the database itself, but how safe do you want your data? RAID0 will allow you to stripe across all your drives with no redundancy. If one drive fails, it is dead. RAID1 is a mirror of your main drive(s). You can run, or should be able to, run RAID1 on top of RAID0. RAID5 allows for rundundancy/CRC checks so if one drive dies, the other drives keep working. I speaking from my experience with Linux, I think NT would be the same, but I cannot assure you of that. If you have nightly/backups, you *may not* need a mirror (RAID1) but that will also depend on the availability of your database too. There can be arguments for each case.

-Steven Poe

Breno de Avellar Gomes wrote:

> I am about to install high availability Oracle8i FailSafe using SMP and
> RAID Compaq Servers (Intel) running NT 4.0.
> Some DBA advised me to use RAID level 0/1, others 5. It seems to be
> controversial.
>
> Wich level is more adequate? Why should I use one instead another?
>
> Thanks in advance
>
> Breno
Received on Fri Aug 06 1999 - 11:18:34 CDT