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Is there any recommened array for placing the disks of a virtual infraestrcture. As example, I heard that for the OS disk is recommened a mirror array. For placing virtual hard dkis which is recommended?

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closed as not constructive by mgorven, HopelessN00b, Ward, Michael Hampton, rnxrx Aug 29 '12 at 1:13

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Depends on what you have the VMs doing, in the same way that the array shape that you choose for a non-VM system needs to take into account what the system is doing.

For making that choice for either a VM data store or a physical machine, refer to this question.

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I can Understand that I should used the best practice for the role that i'll run on the vm. So, for the virtual disk for Operating System in the VM should I use a mirror? – Ricardo Polo Jul 29 '12 at 23:44
@RicardoPolo That usually makes sense for physical machines so that you can dedicate two disks to a smallish OS RAID group, but it's not always what I'd recommend for a VM's OS. The operating system disk doesn't tend to have high I/O needs in many deployments (though it does in some), so it might not make sense for you to deploy a big group of RAID 10 for your VMs' operating system disks. – Shane Madden Jul 29 '12 at 23:51
thank you. So what kind of raid should you use? What do you think about a raid 5 for vms? – Ricardo Polo Jul 30 '12 at 0:14
RAID5 is almost never a good choice for a production environment, but in any event, you've not given enough information to answer your question. If you run your VMs off a SAN, you probably don't need RAID at all. If you've got some other setup, what's going to matter most is how the physical disks on the host are setup. – HopelessN00b Jul 30 '12 at 0:17
@HopelessN00b Why not? In the SAN i should create arrays, isn't it? – Ricardo Polo Jul 30 '12 at 1:35

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