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Yesterday I had a Sun Microsystems FE onsite to replace the backplane and a drive in a T-2000 that had decided data = NOT YOURS. This particular server has some wiring "issues" where you can't just slide it forward without disconnecting some of the cables, so we had stopped with it partway out to clear snags, then pulled lightly again to see if it was clear. Feeling resistance, we stopped, and I went back around the back to see if there was another cable tugging.
At first, I couldn't see one, and I said so, so the FE said "it's probably just a tight fit in the rack then", and as I said "no wait" he pulled.
We don't build our own fiber optic cables here, we order them to custom lengths and don't maintain a very great supply of different lengths. Also, the connectors hold into the cards really well, so the weak point is where the fiber itself is attached to the connector. This is pretty much the only cable that can break that I can't fix and can't guarantee I have another of comparable length onsite.
Fortunately I had one two feet longer, which not only fixed the oopsie, but now that cable has enough slack not to need unplugging in the future. The users will never even know, unless they read this community...
At first, I couldn't see one, and I said so, so the FE said "it's probably just a tight fit in the rack then", and as I said "no wait" he pulled.
We don't build our own fiber optic cables here, we order them to custom lengths and don't maintain a very great supply of different lengths. Also, the connectors hold into the cards really well, so the weak point is where the fiber itself is attached to the connector. This is pretty much the only cable that can break that I can't fix and can't guarantee I have another of comparable length onsite.
Fortunately I had one two feet longer, which not only fixed the oopsie, but now that cable has enough slack not to need unplugging in the future. The users will never even know, unless they read this community...