Am Mittwoch, den 26.11.2008, 15:26 +0100 schrieb Florian Philipp: > Jorge Peixoto de Morais Neto schrieb: > > On Tue, Nov 25, 2008 at 7:15 PM, Joerg Schilling > > <[EMAIL PROTECTED]> wrote: > >> James <[EMAIL PROTECTED]> wrote: > >> > [...] > > As for my photos, I can back all the collection to a single DVD (and > > to a second one, since I keep hearing that DVD-Rs are unreliable), and > > since I don't take new photos every week, this solution is fine. > > A second DVD-R won't solve the problem because optical disks degrade > over time and the second one will degrade just as fast as the first. > What you need to do is to check the disks periodically (once a year is a > good time frame). > I myself would add a textfile with md5sums for all files to the DVD so > you don't have to check them visually. You can buy so called "archival grade" DVD-Rs that should work for 10-20 years in a good environment. There are hugh differences between products. In germany you can buy very good ones from Verbatim for around 2€/disk.
Also keep your photos on 2 HDDs (in different places), and copy them to new HDDs when you buy new ones. Nowadays you buy new HDDs every 2-3 years or so, and normally the old ones should not have failed until then (at least not 2 disks on the same sectors). The MD5/SHA-checks should be done before copying to the new disks, so you can be sure to copy only healthy files.
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