The only storage array I know of that comes as a sealed unit where you don't do drive swaps, is the Xiostorage ISE [1]. It's a very fast array for the money, but it's not particularly high-end.
All the high end arrays, both in terms of performance and availability (IBM DS8000, EMC Symmetrix / V-Max, etc) have done drive swaps for as long as I've used them.
Without drive swaps, you either have to abandon traditional RAID concepts, which might not be a bad thing, or ship with enough standby disks to cope with 5 years of failures.
The place I heard first not doing drive swaps was Google. I also heard that they didn't use RAID, but rather relied on data just being replicated over 3 separate machines. Both of these may have been apocryphal. I'm sure someone around here can correct me if so :-)
I first came across them in IBM's ice cube project around 2002 http://www.eetimes.com/electronics-news/4165609/IBM-stacks-h... which was later spun out into a startup and then canned. I think this was before the Google fail in place stuff. Because it was a 3d mesh you actually couldn't get to the hardware to replace it. They had blocks of 12 drives to offset some of the drive to CPU cost issues. There are a bunch of papers on it if you dig around and its still an interesting model I think.
Google (and others like AWS) don't use RAID, that's absolutely right - but they also don't use arrays from the regular manufacturers like EMC, NetApp, etc.
Whether they eventually get around to swapping out failed drives or not, I don't know. I assume they do, since a CPU and memory costs a lot more than a drive replacement, so you want to keep them up and running.
Right, that's the kind of system I was thinking of: Not off the shelf enterprise RAID enclosures, but big piles of commodity drives run by companies that do storage as their business, like Google and Backblaze and Facebook.
All the high end arrays, both in terms of performance and availability (IBM DS8000, EMC Symmetrix / V-Max, etc) have done drive swaps for as long as I've used them.
Without drive swaps, you either have to abandon traditional RAID concepts, which might not be a bad thing, or ship with enough standby disks to cope with 5 years of failures.
1 - http://xiostorage.com/products/hyper-ise/