[CentOS] CentOS Server Backup Options

Nataraj incoming-centos at rjl.com
Tue Mar 13 13:47:13 EDT 2012


On 03/13/2012 08:09 AM, m.roth at 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
>
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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-media/
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



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