In reply to Bill Shields.

After reading, I ended up getting a quote from our reseller - it was for 58 x 6TB HDDs

It costs a little more p/TB then a similar spec Dell R730xd - But I guess its more dense , uses less power and cooling than multiple smaller boxes and also plugs into existing UCS management software.

Not enough savings for us to consider changing, but worth considering for those already with UCS.