I'm working as an IT and Media technician at a secondary school in the UK and have been tenuously taking care of the Mac network side of things. We have an XServe and about 10 client machines so it's hardly a huge setup, but I had literally zero networking experience (Mac or otherwise) before I started here a couple of months ago, and have basically been given reasonable responsibility over this side of things as I'm a Mac enthusiast in general. So basically, please bear with me if I ask some pretty basic questions. Anyway, the RAID battery in our Xserve (3,1 model, 2.26GHz quad xeon) has died and our IT consultant, who I've been liaising with on this issue, has had trouble tracking down the proper replacement part. At around the same time as the alerts in RAID utility started appearing, the Mac suite which is used for media studies, mostly editing in iMovie and FCE, started slowing right down. When we have more than 2 students trying to edit at the same time, their projects become stuttery and difficult to work with. The stuttering etc. isn't saved in the file so it's not affecting their final projects, just making the actual working process a lot more difficult for them. I guessed that this was due to write-caching being disabled automatically when the battery is conditioning (or when it fails in our case), which slows down write performance. Is this correct? If so, we've been looking in to replacing the RAID battery but have, as I said, encountered difficulty in sourcing the right part. Our IT consultant suggested that we might want to just install a compatible UPS, force write-caching on again and negate the need for the RAID battery altogether. As for my questions: Does anyone A) know of a good place to source the correct RAID battery replacement (again, based in the UK)? Or B) know of a reasonably priced and appropriate UPS that will do the job instead? And C) given the choice, which option would people say is better? I'd be inclined to go with the RAID battery itself since it offers 72 hours of power rather than the UPS options which only seem to offer a few hours at most, at least in our price range, though tbh I've no idea how necessary this length of backup power is. Any help would be much appreciated.