I've talked about Granite Digital before, when I commented on their USB to anydrive adapter, but I was working with someone recently who is having intermittent errors on a server and has been going nuts trying to sort it out. Turns out the server is running conventional, parallel SCSI (SCSI-320, actually). A good choice for a server when this one was built, but these days I'd choose Serial Attached SCSI (SAS) instead. For just the sorts of reasons he's seeing - intermittent buss errors when the drives are known good, the drivers are up to date, the firmware has been updated on the controller, etc. I've been there more than once, and I know how frustrating it can be. Well, if you're having SCSI problems, there is simply no better resource than Granite Digital. They make the best cables and active terminators, bar none. And they know SCSI like no one else. I've used them for years, and they are helpful, knowledgeable, and determined to make it right. Every time I've tried to cheap out and grab a cable from Fry's or wherever, I've ended up paying the price later. Usually not right away - it works for the moment. But then as things deteriorate down the road (hey, it's HOT inside that server cabinet!), I start having problems. Sure enough, no name cables, and most likely a passive terminator. Swap them out with good ones from Granite Digital, and one of their active terminators, and the problems go away. And stay away.
So, do yourself a favour. If you're running SCSI, (or Firewire, or SATA, or SAS,) and you actually care about your data, check out the folks at Granite Digital. Peace of mind is remarkably inexpensive. Especially as we move to faster and faster servers, with 64-bit I/O, it gets a lot more important that the path to that data be perfect.