Rodent of Unusual Size writes about CD failure when ADDING to a backup:
> Benjamin Scott wrote:
> >
> > Time for a public service message: Remember, kiddies, backups
> > are your friends.
>
> What do you think this ^@*&^&*#$%^ CD *was*? Yrgh, backups of
> yer backups.. {sigh}
Given that the cost of CD-R media, unlike any form of reliable
tape that I've ever used, is in the noise compared to the value of
your time when doing backups, I wonder if it is ever worthwhile to
*ADD* to an existing backup of important data. Yes, you could wind up
drowning in CDs, but if you include the contents of the last CD on
each new one. Even if you don't have a second CD (RO) drive, you need
no more than 600MB of temporary hard drive space to do this. Then you
can begin throwing older ones away once having confirmed readability
and checksums on newer ones.
Or even if you're a cheapskate at heart (guilty here), keep a
rotation of several pieces of media, beginning each time by updating
today's disk not only with the new data, but also with everything that
it doesn't have from the last backup's disk. Then if the backup
fails, everything is still either on your hard disk or on a good
backup.
A safe backup strategy requires thinking like an accountant.
Bill
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