Originally posted by sterretje I think that Wheatfield assumed that you have partitioned your HD with a partition for OS and programs and a partition for 'My Documents'. That way a re-install of Windows does not wipe all your pictures, music etc.
That's exactly why.
If you get a virus or an OS failure or any of the myriad of things that can send a computer sideways, it's always the C drive that takes the hit (or the one that the OS is installed on, anyway).
Considering how easy it is to partition a drive, it's good insurance to do that to a single drive computer and then use the partition for data storage.
It is possible to frack up a partitioned drive pretty easily so it isn't really safe, but it's better than nothing.
I wouldn't consider anything on the same physical drive as my OS is on as safe data, though if the computer is never allowed onto the internet it's probably as safe as anything that's on a hard drive, so anything I keep on my single drive laptop is also on my desktop's mirrored drive as well as on my Drobo.