On 03/13/2012 08:09 AM, m.roth@5-cent.us wrote:
Tilman Schmidt wrote:
Am 13.03.2012 00:48, schrieb Nataraj:
I have been sucessfully using 8GB dual layer DVDs for some of my backups/archiving and now that the price of Blu ray has come down I am about to experiment with that. I have been writing dump format files to the DVD's and then writing an SHA256 checksum for each dump file so it's very easy to verify the integrity of the dump.
I am also about to try daily emcrypted backups to http://rsync.net along
1++
with periodic archival to blu-ray disk for one of my backup needs.
In my experience, the long-term stability of DVDs is rather questionable. I've had quite a few nasty surprises with DVDs. Even single-layer ones regularly turn out to be unreadable after two or three years, and double-layer ones are worse. I don't know if Blueray is any better in that respect.
Yup. I've been reading about that instability for several years now: the commercially-produced ones are ok, but not the ones you write; they will *not* last the same number of years.
mark mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Good point. I've been following the recommendations in articles such as this http://adterrasperaspera.com/blog/2006/10/30/how-to-choose-cddvd-archival-me... using mostly the Taiyo Yuden and verbatim media where I could identify the country of origin and the dyes and so far I've done ok. A good reminder for me to check some of my back archives. I also have this same data stored on hard drives, so there is redundancy.
As some have pointed out, if you really need long term archival of data I think a good plan would include periodic testing and refresh of media or rewrite to new media.
Nataraj