I have a PowerEdge 2400 server I have been working with for 4 years, and which has been running 24x7 for 5 1/2 years (Except for re-boots). For the last 4 years it has had 3 18GB drives on RAID5.
Last week I shut the server down, and after grounding myself to the server, installed 3 additional known working 18GB SCSI drives, filling all available SCSI slots. Slots #3, 4, and 5 had never had a drive installed. When I hit the power button to re-start, the green light came on for a split second, then the server was dead. Should have stopped right there and came here and asked a question, but no, I unplugged the server for 5 minutes, then plugged it back in. This time it started normally. Well, it was normal until I smelled the ozone, but then it was too late, the backplane was fried. When I removed the backplane I easily spotted the overheated chips on it.
This is one of only 3 true servers with SCSI drives I have ever worked with, so my experience is limited. Did I possibly do something wrong here, installing drives in all the slots? Did they pull too much power? Or is it possible the backplane was bad from day one, and it didn't show up until we attempted to fully utilize it?