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Re: [semi-OT] Data archiving (was Re: Query on adding a USB hdd)



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Douglas Allan Tutty wrote:
> On Wed, May 23, 2007 at 10:49:51PM -0500, Ron Johnson wrote:
>> On 05/23/07 20:17, Douglas Allan Tutty wrote:
>>> On Wed, May 23, 2007 at 07:05:23PM -0500, Ron Johnson wrote:
>>>
>>>>> It would be very nice if there was a universal cross-platform rw +
>>>>> encrypt filesystem for archives.  Something that you could be confident
>>>>> that you could decrypt and access in 10 years using whatever OS was
>>>>> current then.
>>>> tar is cross-platform, as is ASCII CSV.  PGP/GPG is also cross-platform.
> 
>>> I don't know if a generic tarball I make today will be readable by
>>> whatever OS in 10 years, which is why I store a current install cd.  In
>>> 10 years, hopefully I can find a computer that will boot it.
>> You've got bigger problems if you think that a CD-R will keep it's
>> integrity for 10 years.
> 
> No.  I figure a CD is good for at least a year.  Every year, I
> pull the two netinst cds from the bank, take an SHA hash and compare it
> with the written notes, then run something like cdck on them.  So far,
> my Woody CDs are fine.  Funny enough, so is my woody floppy set (the
> whole shebang set of 20 floppies) on Maxell floppies; needed for my 486
> that doesn't boot from CD or run an installer after woody's.

Wow, you seem to have a lot of spare time. How long does it take you to
perform all these checks?

I do backups to usb hard drives. They have 40GB to 120GB and it takes on
the order of 1 minute / GB to diff -r them.

Considering lifetime and how often you're able to rewrite / reuse the
media, they are cheaper per GB than CDs/DVDs.

I guess I will realize soon enough, whenever usb and/or ext3 will be
phased out and replaced by a different technology and will then move the
data to new media / formats.

Johannes

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