Best Hyper V Host Raid Stripe Size and Cluster

I have two servers that will be my HYPER V hosts and I have 2 SAN Servers. I was going to setup a raid on each host.

1 For the Hyper V hosts/cluster servers I was thinking raid 5 or Raid 10. Which is better?
And what stripe or cluster size should I use?



Then for the San Servers. Both Have 16 Seagae 10Krpm SAS 78GB drives. I was going to make a raid 10 on the whole server to give me one big 550GB partition. This will have all my virtual machines LUNs on it.

What stripe and cluster size should I use?
MEATBALLHEROAsked:
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btassureCommented:
Don't use RAID5. It's awful. It was only ever any use when hard drives were really expensive. Stick to RAID10 where you can. That applies to the SANs and the servers.

RE the SANs, max out your cluster size if you are only having large VHDs on the array. Stripe size won't matter much on the array because pretty much all your files will be spread across multiple stripes anyway.

On the servers just stick to default values anyway.

Long and short of it is that none of these things will make a big difference anyway, personally I keep most things to the defaults at this level since it isn't usually sequential read/writes on VHDs anyway.
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MEATBALLHEROAuthor Commented:
The raid cards have different defaults. The San defaults at 64kb and the Hyper-V hosts defaults at 256KB for stripes?

Should I just max out the stripes? I think one has a 1024kb and the other has a 512kb option. Just double checking.

There are 4 virtual machines that the HOst server will have and the VMS will be stored on the SAN with and iSCSI connection to the hosts using ethernet with JUMBO Frames enabled.
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MEATBALLHEROAuthor Commented:
I meant my HYPERV Servers Connect to SAN via ISCSI not fibre channel.
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btassureCommented:
Might as well max them out if you want but leaving them at default probably won't do any harm either. It will probably be easier for anyone following you with work though. Whichever route you choose, document it (and the reasons why, if you can) to make life easier for others!

RE Jumob Frames, again, I find them more trouble than they are worth when using good switching gear. If you have ToE on your network cards and fast switches (medium-high end Cisco etc) then the packet fragmentation won't add enough overhead for you to notice it.

Once you have full flash arrays and 40Gbe iSCSI you might need to rethink that but for now I would say you are OK!
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