Which RAID is best for ESXi vSphere running Symantec Messaging Gateway?

[revolutionj]

Hello,

My organization is currently running Symantec Messaging Gateway on an ESXi hypervisor.  We are wanting to upgrade the hardware to a new Dell PowerEdge T130 server so we can utilize a RAID array for redundancy.  Are there any recommendations for which RAID level to use?  I am leaning towards either a RAID 5 or RAID 10 configuration.  The PowerEdge has 4 available drive bays so we will have a maximum of 4 drives total.  We only have around 60 employees so the Symantec Messaging Gateway usually doesn't have an extremely heavy load.

Currently, our Symantec Messaging Gateway is running on ESXi with a single disc, and it runs well, but our main goal is to have some kind of disc redundancy in the instance a drive fails.  As long as whatever RAID array we use has better performance than a single disc then we should be fine.  Would a RAID 5 or 10 be best for this scenario?

Any recommendations are appreciated!

Thanks

[daphnissov]

With only 4 disks, you have to figure what you need more: performance or capacity. RAID-5 is going to give you more usable capacity while RAID-10 is going to give you more performance. Which is more valuable?

[revolutionj]

In our case, performance would be more favorable over capacity.  Our currently configuration is only utilizing around 150GB of storage space and we really wouldn't need much more, say 250GB, in the new server. 

[daphnissov]

Then it sounds like RAID-10 is what you want in your case.