On Wed, Sep 20, 2000 at 04:19:30AM +0900, James T. Perry wrote:
>
> Hi Jay,
>
> "Austad, Jay" wrote:
>
> > I had both of my QMQP servers bouncing off of the 120 limit
> > yesterday, and they were pretty much idle (Dell 2450's with
> > 2 striped 9GB 10k rpm drives).
>
> Which RAID level?
> I remember somebody mentioning in this list that 0+1 will perform
> faster than 3 (or 5 obviously ;).
> I can't confirm this since I don't have that kind of artillery
> here at home. Anybody?
You need at least 3 disks to do raid 5, and 4 to do 0+1. Since he mentioned
that he only has two disks, and that they are "striped", it's pretty likely
that he's talking about raid 0. (BTW, what is raid 3? I've never heard of
that.)
Raid 0+1 will always be faster than raid 5, (with an equivalent number of
disks per stripe) due to the lack of a need to calculate and store parity
information.
--Adam
