Network and Storage Protocols
we recently bought a FAS3140mc storage and I wonder if it exists an efficient way to compute the size of a flexvol (we use the FAS3140mc in pure SAN mode, no CIFS/NFS access).
I do not use snapshots but I've understood that I must keep space for fractional reserve so I can't create a volume which have the same size that the LUNs it contains.
So, do you know a math formula which can help to size my volume ?
For example, if i create a Flexvol with 10 LUNs of 1 TB, should I create a volume of 10.5, 11 TB or any other size ?
See The Solution
If you're not using snapshots on the volume, it needs to be just big enough to store the LUNs. You do know that you can resize (grow or shrink) a flexible volume after it's created, don't you?
View solution in original post
fractional reserve only applies if you intend to use snapshots. if not, forget it.
The other comment is also true, you only need a volume a little bigger than the LUN. For example 1GB.
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