VMware Solutions Discussions

LUN and Volume size


Hi Guys,

I have few queries and just want a clarification on below. please suggest and also let me know if any docuements from Netapp related to maximum configuration on Netapp filers.

my questions are:

how many times the LUN and Volume size can be increased on a filer?

how many LUNs can be assigned to Windows server, ESXi and any other Operating Systems from a filer?





1. There is no limit to increase / decrease volume / lun size

2. I did a research a while ago in regards of that issue for windows hosts, what i found is: there is no limit as long as you do not assign a drive letter. We currently use mount points on W2008 boxes and the average amount of luns 50+.


There is (or at least, was) limit to how far you can increase LUN size. This is due to requirement to preserve geometry information (actually, cylinder size); so when you grow LUN, it increases number of cylinders. It is limited to 65536, so it is how far you can grow it.


bear in mind though a NetApp LUN cannot be increased to more than 10x of its initial size.

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