Re: The cleaner did it.
That reminds me ... We banned floor wax in data centers when HDDs first became common ... The reason was that the wax made it easier for the big machines to "walk" when in use, sometimes far enough to pull their own power and/or data cables. I had one block the only door in once, in the throws of committing suicide ... I had to climb over the hanging ceiling to get in to restore order.
At DEC and SLAC, we actually pulled the tiles a few at a time, took them outside & scuffed them with 120 grit on an orbital sander, wiped them down with a tack cloth and then replaced them. Made for better traction, and fewer incidents of equipment going walkies without permission.
This precedent of "telling the cleaning staff their job" (as it was claimed) made it easier when we finally kicked them (almost) completely out of the machine room ...
Biting the hand that feeds IT
