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mjkellerii
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April 6th, 2011 12:00
VNXe VMWare Wizard - Block size
There is no way I can find to set the block size when creating a datastore on the VNXe for VMWare hosts. It seems to default to a 1 MB block size which restricts the VMDK created on the datastore to 256 GB. Is there a way around this?
I have created the datastore and then gone into vCenter, deleted it, then recreated in vCenter with a larger block size. This seems to work and the datastore entry seems to stay intact in UNISphere. Ther should be a selection for block size in the Wizard!
Unfortunately you cannot change block size from the VNXe. If you delete the datastore from vSphere after the API creates it and then create a new one in vSphere with the same name with your required block size, you can still take advantage of the API. Keeping the name the same allows subsequent deletes from Unisphere to also remove the datastore from vSphere.
mjkellerii
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Posted April 6th, 2011 15:00
Thanks for your replies
Yep. That is exactly what I did. Deleted the datastore in vSphere and then recreated using the add storage wizard - with the same name.
I guess my point is that since the VNXe is "customer installable" and meant for the "IT generalist" the interface should allow for this. It is kind of tough to explain to a customer that once they create the datastore they must delete it and recreate it again. I am a storage engineer (EMCIE - Clariion) and it took all of about 5 minutes to figure this out. It might be quite frustrating for a customer who doesn't work with vSphere and storage on a regular basis.
Maybe this is an enhancement request...
Shivanand1
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Posted April 6th, 2011 12:00
You can use "add storage" wizard under Vsphere to change the block size.