I feel like this is a question I've seen on here before, but some searching didn't do me any good. This looks similar, but I'm looking for stuff I leave there, not what's in my go-bag.

What would you say is indispensable equipment in your server room? I've inherited one that's a bit light on stuff (except for servers, those are in there). We're in the single digits of racks, if that matters.

I'm thinking of things like:

• Cable labeler
• Ethernet tester (copper at least, fibre if you need)
• ... ?

Community wiki, because, really.

[Edit] I suppose it's important to say that it's a colo facility, kind of far from the office. No food, water, etc. :(