What I do is buy a new drive for my primary machine every now and then when I run out of space (or upgrade to a new machine). One of the externals is connected to my server as an 'online' backup and I rsync to it nightly. The other is stored offline in my fire safe. Every so often I swap those to keep the offline in sync.
This keeps a backup drive safe in the safe should the house burn down but also keeps a backup drive outside the safe for the daily changes.
I actually don't buy them all at once. I set a budget and buy one at a time and the newest goes in the primary machine and the one it it becomes a backup and the oldest backup goes into spares where it could be a OS drive for my server or the drive in one of the kids laptops.
Thats why i said I simplified my example before as my data and situation is complex. What I'm simply trying to point out is there are no absolutes, SSD's won't work for everyone or 100% of the time. And I said yes that can change when the cost per G of storage comes down enough that I don't have to choose between redundancy and speed. And I'm sure that as the price/G of SSD's comes down the price/G of HDD's will come down as well but the price/G of SSD for e just has to get down to where a drive bigger than my data (+ projected growth before next upgrade) fits within the budget.
Again I'm just saying there are no absolutes and one solution does not fit everyone. Don't let the close source world creep into the open source world, I'm seeing the same thing happen with software where everyone things everything must look the same.
Last edited by enine; 11-19-2013 at 11:16 AM.