On Wed, Sep 2, 2020 at 12:00 AM Christopher Morrow <morrowc.lists@gmail.com> wrote:
On Tue, Sep 1, 2020 at 11:53 PM Alain Hebert <ahebert@pubnix.net> wrote:
As a coincidence... I was *thinking* of moving a 90TB SAN (with mechanical's) to another rack that way... skateboard, long fibers and long power cords =D
well, what you REALLY need is one of these: https://www.cru-inc.com/products/wiebetech/hotplug_field_kit_product/
Yeah, no... actually, hell no! That setup scares me, and I'm surprised that it can be sold at all, even with many warning labels and disclaimers... After the first time I saw it (I suspect also due to Chris!) I tried doing something similar -- I cut the ends off a power cord, attached alligator clips and moved a lamp from one outlet to another -- this was all on the same circuit (no UPS, no difference in potential, etc) and so it doesn't need anything to switch between supplies. I checked with a multimeter before making the connections (to triple check) that I had live and neutral correct, had an in-circuit GFCI, and was wearing rubber gloves. It *worked*, but having a plug with live, exposed pins is not something I want to repeat.... On a related note - my wife once spent much time trying to explain to one of her clients why they cannot just plug the input of their power strip into the output of the same powerstrip, and get free 'lectricity... "But power comes out ot the socket!!!" , "Well, yes, but it has to get into the powerstrip" , "Yah! That's why I plug the plug into it..."... I think that eventually she just demonstrated (again!) that it doesn't work, and then muttered something about "Magic"... W
and 2-3 UPS... swap to the UPS, then just roll the stack over, plug to utility and done. (minus network transfer)
-- I don't think the execution is relevant when it was obviously a bad idea in the first place. This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants. ---maf