Rich writes,

<I do a newsletter that has been fried a few times by currupted files.   
This was
on my old Amiga, not the Mac.  But disk space these days is so cheap.>

Well, uh, on my budget, it isn't.  This isn't to say it's IMPOSSIBLE for 
me to have an external backup system, but I've gotta watch the money and 
not waste a single byte of what I do have.

<So why not keep a history of the project until it is out the door?>

Computer wise, other than budget considerations and even if the disk 
space is cheap for you, why keep "old copies" of files, even important 
ones, when it's easy enough to simply keep fully updated backup copies 
alone? Plus, even cheap, when you spend repeatedly, it adds up. I mean, 
if your computer ate one of your important files, forcing you to resort 
to a backup what would you be doing, copying in the most recent backed up 
version, or using a copy you made days or weeks ago? There are some days 
when a day-old backup would be good enough for me anyway, but other times 
when a particular day's work is not only crucial, but especially lengthy, 
and if I lost it, I'd be very upset, because a day-old, or older, backup 
copy, would NOT restore the loss.

But this does remind me of something I did used to do, non-computer wise, 
in that I kept what were, in a sense, "historical project backups." When 
I used to work as a microbiologist doing bacterial identifications, I 
used to subculture each microorganism after I'd run it through the ID 
process, in the event that I couldn't get an ID on the first run, and 
even though the overwhelming majority of the organisms I got for ID, say 
90% of them, I WAS able to identify to species level in one day or, for 
those requiring longer incubations, on the first try. Reason for this: 
You can only run an 18-24 hour culture through this process (after 
setting the organisms up, most of the ones I got had to incubate 
overnight to show proper reactions, but there were a few that needed 
48-72 hours). If you can name the bugs after their first run, great, but 
if you don't, then you have to repeat it, along with in many instances 
performing additional tests. And for THAT, you need another 18-24 hour 
culture, and your original one would be 36-48 hours by then -- unusable. 
And until I actually identified a particular organism, I'd make another 
subculture of it each day until I DID get an ID, so I'd always have a 
fresh one to work with if I needed it. Hence these "backups," although 
they were on petri dishes instead of floppy disks, Zip disks or CDs.  ;-) 
And I didn't throw them (yes, them -- five different labs were giving me 
their IDs and I had anywhere from 50-200 new ones every week) into the 
biohazard trash until Friday afternoons, once I'd signed off on the 
week's reports.

<Remember the early days of desktops where WordPerfect (with versions for 
PC,
Amiga, ATari and even Mac) had timed backups? With half a meg of ram, we 
saw
crashes often enough to that the powers for those backups.>

Hmmm. I remember the EXISTENCE of those computers, and my friends back 
then had them, but I never owned any of them. I didn't actually buy 
myself a computer until I was able to afford a Mac. So I'm not intimate 
with how those other ones operated, or how they behaved in terms of 
frequency of crashing. The Mac Plus I was using on the job back then 
(1986-87) never crashed on me and although I had my daily backups, I 
never had to use them. (Hmmm, I wonder if THAT was why I fell in love 
with Macs and refused to buy a computer until I could afford to buy one!)

<I've found it really intersting to talk to folks who keep hospital files 
in
geographically disperse places.  Talk about critical backups.>

Yeah, really!  :-O

~Yersinia.

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