Doug S (foo.delete@this.bar.bar) on October 12, 2018 2:01 am wrote:
> No, there's no reason at all and I don't know why anon makes it sound as if it would be difficult.
> This is the whole point of blade servers, after all - the servers slot in vertically rather
> than horizontally so aren't restricted by the width of the rack. Then it is down to how tall
> the blades need to be (how many rack units) and how closely you can space them together within
> the standard rack width and still achieve the necessary cooling.

Note that server rooms are not always simple neither, the width of the rack is not the only point.
Some world areas insist (i.e. will never buy) a front-to-back cooling system while other world areas will not accept side-to-side cooling... and everyone want hotplug to replace failing boards...
It is amasingly difficult to design a system which can be configured for either ways of cooling.
Moreover, aircond rooms have special requirements: if the processor becomes too hot, do not do anything in firmware/software (but hardware over-limit switch-off protection), we will just increase power to the aircond...

Etienne.