3 Replies Latest reply on Jun 16, 2020 3:03 PM by jooji_marsh

    vSAN sizing calculator - why so much overhead

    jooji_marsh Novice

      Hi,

       

       

       

      Im struggling to find justification in the vSAN sizing calculators vs real life. I've configured a couple of hybrid and all-flash clusters over the last few years and im currently speccing a 76TB all flash cluster. the vSAN calculator is telling me i need 5 nodes with 12 x 3.84TB capacity disks giving 225 raw and 92 useable. Thats a lot of overhead?

       

       

      Looking at another 45TB cluster i deployed last year i have 5 nodes with 8 x 1.2TB capacity disk per node giving me 43TB raw and basically the same useable. The overhead is only about 700GB.

       

       

      So whats the crack?