Blades - the hidden costs
Where I work we moved to blades several years ago, choosing Dell.
We then built our new server room, and now we are moving a good few racks of kit to a co-location facility.
This is where the kicker comes. As most hosting facilities were built some time ago their power and (more importantly cooling) they are not setup for racks of blades.
In the facility we are moving into we have ahd to pay for twice as much floor space and power as we would have done for 'normal' rack servers.
Baldes are very useful and you do save on space, but be aware of the hidden costs.
There is still no such thing as something for nothing!