If you make multiple copies on the same media at the same time, they will decay at the same rate...  And cloud storage has no actual guaranties as to the backups working or terms of storage, as a bunch of photographers found when their cloud storage company went broke.  Luckily another photo storage company saved their bacon...

On 2/9/22 6:52 PM, Josh Luthman wrote:
Multiple copies.

On Wed, Feb 9, 2022 at 4:31 PM Robert <[email protected]> wrote:

    The issue with digital storage is the duration of the digital
    copies.  Even laser discs decay over time, magnetic images decay
    faster.   Tape images done in the 60s are being retranscribed with
    serious errors because of decay of the magnetic poles...

    On 2/9/22 11:13 AM, Brian Webster wrote:

    In the Navy we had very large Halon system to combat fires in the
    main engineering spaces. If you worked in that space you actually
    wore a person sized breathing device that would last you long
    enough to get out of that space if Halon was activated. And you
    can bet we had a lot of training about it, the alarms, the time
    you had to get out after the alarm sounded before it was deployed
    etc.

    In conjunction with the idea of losing documents, we should as a
    society get better at scanning these things. It is so much easier
    to have multiple diverse digital copies of these than the
    physical paper. Hell the banking industry got out of the paper
    check stuff 20 years ago. Have you looked at old documents
    scanned from original from places like Ancestry.com or
    Family.searc.org <http://Family.searc.org>? They have links to a
    lot of governmental document sources, for instance I could see
    scans of the military muster reports for family members in the
    revolutionary war or from the state records of pension payments
    to civil war veterans. Mind boggling that we can now see scans of
    those original documents.

    Thank you,

    Brian Webster

    www.wirelessmapping.com <http://www.wirelessmapping.com>

    *From:*AF [mailto:[email protected]
    <mailto:[email protected]>] *On Behalf Of *Chuck McCown via AF
    *Sent:* Wednesday, February 9, 2022 1:36 PM
    *To:* [email protected]
    *Cc:* Chuck McCown
    *Subject:* Re: [AFMUG] OT: Document Storage

    I visited one of those once.  Before going in we had to have a
    training session about the alarms and the controls.  Not sure if
    we were supposed to do something other than leave if the alarm
    went off.  Maybe there was a delay to allow us to exit before
    releasing the gas. It was a serious deal.

    *From:*Bill Prince

    *Sent:*Wednesday, February 9, 2022 11:11 AM

    *To:*[email protected]

    *Subject:*Re: [AFMUG] OT: Document Storage

    In my former years, data centers often had halon systems which
    would displace air in the entire data center. They were phased
    out because no air is just as bad for humans as it is for fires.

    bp
    <part15sbs{at}gmail{dot}com>

    On 2/9/2022 10:03 AM, Zach Underwood wrote:

        Automate the whole racking system so that you can purge
        oxygen out of the whole room?

        On Wed, Feb 9, 2022 at 12:42 PM Chuck McCown via AF
        <[email protected]> <mailto:[email protected]> wrote:

            Wow, I am sure there are lots of irreplaceable
            documents.  So if you were to
            build one, I wonder how to prevent this same problem?
            I guess structural engineering needs to presume all the
            racks are full of
            water.

            -----Original Message-----
            From: Nate Burke
            Sent: Wednesday, February 9, 2022 10:36 AM
            To: Animal Farm
            Subject: [AFMUG] OT: Document Storage

            Here in the Chicago suburbs, a 250k sqft document storage
            warehouse just
            burned down.  It took them a week to put out the fire. 
            30' Racks
            stacked with banker boxes, when the building sprinklers
            hit it, the
            paper got waterlogged and got too heavy for the racks to
            support and
            came down, taking roof supports and building sprinkler
            system down with
            them.  Once the roof was opened up, the fire got lots of
            air, and just
            started raging.  With the roof gone, nothing was holding
            up the precast
            walls, etc.etc.  Basically there's no more building left.

            So what kind of paper documents are stored in warehouses
            like this? Bank
            Documents?  Law office contracts?  The Panama Papers? 
            I'm just curious
            what the market is for industrial scale paper storage
            like this.  I see
            a lot of storage places like this around the suburbs.
            Iron Mountain has
            a couple big facilities.  I'm guessing you are
            responsible for your own
            redundant copies at multiple storage warehouses?  Also
            seems like if
            there are just boxes of papers stacked on a shelf,
            there's really no
            security.

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--
        Zach Underwood (RHCE,RHCSA,RHCT,UACA)

        My website <http://zachunderwood.me>

        advance-networking.com <http://advance-networking.com>



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