[wplug] Online Backup

[Rick Reynolds]

Are you thinking of rar and unrar?  I'm pretty sure I've seen them  
used with external parity files.

Thanks,
Rick Reynolds
-- 
"Never work for a sawmill that's so behind that they don't have time  
to sharpen the blades." -- Will Hayes, Software Engineering Institute



On Oct 13, 2007, at 4:05 PM, Bill Moran wrote:

> Patrick Wagstrom <pwagstro at andrew.cmu.edu> wrote:
>>
>> Zach wrote:
>>> On 10/12/07, Teodorski, Chris <teodorski at ppg.com> wrote:
>>>> CD's sure, but what is the shelf life of a burned CD (maybe 5 years
>>> at best) and I
>>>> hear the same is true for DVDs.  I wonder how many parents are  
>>>> unaware that a
>>>> burned CD isn't like a "pressed" CD and 7 years from now when  
>>>> they go
>>> to look at
>>>> the photos of their little bundles of joy are going to be  
>>>> shocked to
>>> discover some
>>>> or all are unreadable.
>>>
>>> Wow I didn't realize this! So all my data CD's will be gone in 5
>>> years?! UGH NOOOOO!
>>> How can I backup my data so it will be around for a long time? I  
>>> don't
>>> mean online backup, I need something I can do myself at home.
>>
>> Just to clarify, it doesn't 100% mean that all of your data will  
>> be gone
>> in 5 years.  Back in 1996 I spent way too much money as a high school
>> student to buy a CD Burner.  I still have some of the first CDs I  
>> burned
>> using that machine (when a blank CD would cost about $15-$20 and you
>> needed to ask at the special service desk at CompUSA for them),  
>> and my
>> testing shows 10 out of 10 just fine.  Well, as in I could pull  
>> up, do
>> an ls, and poke at a few other files.
>
> This is killing me ... I've been trying to remember the name of this
> software for weeks.
>
> There's a spiffy little POSIX program out there that you can feed a  
> file
> and it will break it into chunks with parity.
>
> The concept is that you take all your important data, tar it up into a
> single file.  Let's say the total file is 2G, which is too big for a
> single CD.  Then, you feed it into this program and give the program
> the switches to tell it max file size of 650M and 2 parity files.  The
> program creates 5 files of about 650M in size, so you can burn 5 CDs.
> The beauty is that since you created 2 parity files, you can lose up
> to 2 CDs and your data is still recoverable, much like a RAID 5 or
> RAID 6.
>
> Unfortunately, I can't remember the name of the software, and I've
> been unable to formulate a Google search that finds it ...
>
> Anyone know the program I'm thinking of?
>
> -- 
> Bill Moran
> http://www.potentialtech.com
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