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Dell MD1000 best practices

We recently purchased an MD1000 to add to our MD3000.
I am trying to find out what is the best way to utilize I/O on the MD 1000.
When creating my virtual disks is RAID 10 better than RAID 5.

We have (4) ESX host connected to the SAN. We are planning to virtualize our Exchange server, File Server and a Oracle Server? What RAID solution would be best for all these servers?
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MECIT
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MECIT
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3 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
if you want the best performance RAID 10.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
RAID 10 will give you far better read and write performance compared to RAID 5, at the compromise of reduced storage.

for Oracle and Exchange databases with lots of reads and writes, RAID 10.
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MECITAuthor Commented:
How many drives does raid 10 require?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
The minimum number of drives required for RAID 10 is four

More disks or spindles is better for performance.
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MECITAuthor Commented:
I'm thinking about 6 HDs. If I wanted to add more can I do it later down the road.

What about for a file server? Raid 5 or 10
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you want good performance for Read and Writes RAID 10 is always going to be better than RAID 5 for your entire datastore which your Virtual Machines disks reside on.

You always want the fastest possible datastore for your virtual machines, and thats' RAID 10.

6 HDs is good, more the better. More spinny disk the better the performance.

You've also got to be careful here that you do not go above 2TB - 512 byte LUNs, because ESX/ESXi maximum LUN size is 2TB.

It's probably better to keep LUNs smaller than larger.

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MECITAuthor Commented:
I appreciate the advice. I will take this into consideration when creating the virtual disks. Thanks
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No problems, any other questions, please just post.

Good Luck.
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