Re: RAID 0/RAID 5???

My 2c worth.

Are you sure that he didn't mean RAID1?
RAID0 has zero redundancy, so if one disc fails, you lose EVERYTHING!
RAID1 is a set or identically mirrorer disks, so if one fails, the other can carry on working as usual. The read and write speeds usually equal the speed of a single disk.

I'd go for RAID5 as it offers great redundancy (although you can only lose 1 disk), but you have the added advantage of multiple disk heads reading and writing data to and from the array, therefore throughput is usually greater.

A useful website that explains RAID configurations can be found here:
http://www.raid.com/04_01_00.html

Hope this helps.

Kirsten wrote: 
Hi.
I bought two brand new HP/Compaq ML370 servers with 4 SCSI disks each and a
Smart Array Controller (hardware for raid capabilities).

With my old servers I had RAID 5 with a similar configuration so I was going
to configure the new servers with the same mechanism, but the Compaq agent
that installed the new computers told me to use RAID 0 because it is safe
enough and save lots of CPU+hardware resources.

The obvious fact is that RAID 5 is SAFER than RAID 0, but now I'm a little
bit confused by this guy's suggestion.
So, what do you suggest? Each server will hold an instance of SQL Server and
IIS Server.

Thanks in advance,
Kirsten


.

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