Re: One time
"The number of times I've seen such a light when walking by"
Yeah, I once got called out to a Compaq server with a 3 disk RAID array that had failed. I got there and there were two red lights showing two failed drives. I asked the on-site person (non-techy type), in conversation, when the two lights had come on. "Oh the second one came on yesterday, the other one has been on since I started here". Oops! Clearly their head office were not monitoring or checking to make sure someone on site was aware of how to at least keep a basic eye on things. No blame for the on-site non-techy person though. She had little knowledge about MS-DOS and none at all about Novel servers, that wasn't her job. She knew how to drive the PC to do her job.
On a similar note, an "emergency" HDD replacement on a similar vintage server, out of hours, so no one on site to query other than security, Only one failed drive in this case so I go to pull the hot-plug drive and note that there is a lit "failed" LED and the "faulty" drive has been removed already. Called over the security guy to confirm what I was looking at (Always have a witness, just in case). Phoned their IT guy and asked about the state of the drives when he left for the day. He says he pulled the faulty drive ready for me arriving. I could almost hear the "gulp" when I told him he'd pulled one of the two remaining good drives and the array was now toast.