Re: par2

[Joel Rees <joel.rees@gmail.com>]

On Sun, Aug 10, 2014 at 4:56 AM, AW <debian.list.tracker@1024bits.com> wrote:
> On Sat, 09 Aug 2014 15:24:49 -0400
> Gary Dale <garydale@torfree.net> wrote:
>
>  > Assuming you have both a backup copy and a live copy plus some par2
>  > files, you should be safe with the 5% to 10% I suggested.
>
> If going with an external backup and pars... I'd also add md5sums to the list.
>
> I've had great success using external drives drives connected to a low power
> device like the Raspberry Pi.

... current beagle board, etc.

(Beagle Boards, I think, tend to make the driver source and such a bit
more available in the spirit, not just the letter of the license, has
some drawbacks, as well. Others have various benefits and drawbacks.)

> The full data system:
> CPU 0 -  Original is on host drive.
> Pi 0 -  Backup is RAID 1 [with two separate drives]
> Pi 1 -  Repair data is on separate backup drive along with md5sum lists.

How about sha256 checksums?

> All connected via network, rsync between machines.  Cron scripts run nightly to
> retrieve, verify -- md5sum -c first, repair data.
>
> Additional cost is:
> $70 for 2xRPi

Wait:

> $250 for 3x1GB drives

Did you mean 3xiTB, by any chance?

-- 
Joel Rees

Be careful where you see conspiracy.
Look first in your own heart.