Gerhard Fiedler wrote: > > make extra-copies. > It doesn't help a lot to buy another dozen if the one copy you > made (because making those copies is such a pain) has > gone bad. Backup only user files or, even changed user files. Zip them before back up. Do not backup system folders. I don't see why you have to backup more than some Mbytes each time under such scenario. With CDR under XP it takes a minute. When zipping, split the big zip into reasonable number of smaller volumes and store them according to your favorite redundancy algorithm among a number of CDRs. Small 200 Mbytes CDRs are reliable mechanically and could hold tenths of sessions. > > That's the point: the cost of validating (testing) of the new long-run > > situation is much higher than the cost of just getting to the start > > position once in a while, like for steppers. > You missed the point. The starting position doesn't help me a lot, > it's the working position that I want. That's where the current system > is. And it's pretty far away from the starting position. You can't enter twice the same river; you can't reproduce twice the same set of hardware. So, in a strict meaning, there is no much sense to backup working position, at least with Microsoft software. Setting a snapshot of some process as starting point of another process is out-of-specs business. Regards, -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist