VMFS 5 provisioning

Hi,
with the new vSphere ESXi 5.1 Update 1, can I provision multiple 2TB each VMFS datastore which will be use by 25 ESXi servers and hosting 125+ VMs ?
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Senior IT System EngineerIT ProfessionalAsked:
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Paul SolovyovskySenior IT AdvisorCommented:
That shouldn't be a problem.  vSphere 5.1 allows you to make datastores up to 64TB although 500GB to 2TB is a good median.  I would keep the number of VMs per datastore to a max of 20 to 25.  

What type of storage are you using?
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Paul the SAN array is VNX series Fibre Channel Storage Pool RAID6.

What about the existing ESX host which still using ESX 4.1 ?

Can it use or see the 2 TB LUNs VMFS5 data store ?
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Paul SolovyovskySenior IT AdvisorCommented:
you can have a mix of ESX 4.1 and 5.1 hosts as long as the hardware matches up, if not then you may need to enable EVC to mask the new CPU features.  

I would keep the current VMs on VMFS3 until you upgrade the hosts to 5.1 and keep in mind that vCenter will need to be upgraded first
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Yes I've done that already, so in this case does the ESXi 4.1 can storage VMotion between VMFS 3 to 5 ?
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Paul SolovyovskySenior IT AdvisorCommented:
From the upgrade guide you will need to upgrade to ESXi 5.0 and higher before you can use VMFS 5

http://www.vmware.com/files/pdf/techpaper/VMFS-5_Upgrade_Considerations.pdf
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, but we prefer often to use smaller LUNs, justn in case of a LUN disaster, and less VMs would be lost, unavailable.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
ok, so in this case, I can only select or create VMFS5 new datastore with 1 MB block size since there is no other choice in vSphere 5 ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
That is correct only 1MB!
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Great, thanks man.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
no problems
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