Why Archieve to CD/DVD? Why not...

Discussion in 'Digital Cameras' started by Harry, Oct 21, 2005.

  1. Harry

    Harry Guest

    Why achieve to CD/DVD? Why not keep all your images on hard drive, however,
    also have an external hard drive that you back up on? With the external
    hard drive you could keep it at work or in your car and back up every month
    or so.
    Harry, Oct 21, 2005
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  2. Harry

    Ken Weitzel Guest


    Because that's only one level of redundancy. Susceptible to virus's,
    malicious damage, accidental damage (I once, very tired, erased the root
    of c:\ ), being dropped, theft, fire, flood and more.

    And I surely wouldn't leave it in a car...

    CD and DVD media is inexpensive. Use an extra drive as you suggest
    above if you wish, but also burn multiple copies of dvd's and closed
    cd's - store some off site.

    Just my 2 cents.

    Take care.

    Ken Weitzel, Oct 21, 2005
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  3. Hard drives have moving parts and so are more likely to succumb to being
    dropped and banged. And you must in any case have at least two external
    hard drives, or Murphy's law says you'll get a power surge just when
    you're doing a backup, wrecking both drives at the same moment. Or a
    virus/bug which has the same effect. (And it's probably not good policy
    to keep anything valuable in your car either, in most areas anyway.)

    If you have more photos than will fit on a couple of DVDs, a combined
    strategy of both external hard drive and DVDs is probably the best bet.
    Stephen Poley, Oct 21, 2005
  4. Harry

    Harry Guest

    But surely the only way to destroy a hard drive permanently, is to
    physically overwrite the entire hard drive, or physically damage the entire

    You may have to pay, but data recovers/forensic specialists can recover data
    from hard drives in some very extreme circumstances.
    Harry, Oct 21, 2005
  5. If you've got the money to pay for data recovery from a hard drive which
    has had a head crash or a seized bearing, then why not just use a backup
    service of the type that professional data centres have?
    Stephen Poley, Oct 21, 2005
  6. No no no. The Right Way (tm) to make permanent archives is to rent time
    on the Arecibo radio telescope and broadcast an encoded datastream into
    deep space. When you want to retrieve your pictures, just hop into your
    faster-than-light starship, jump out the proper distance, and collect
    the signal.

    Daniel Silevitch, Oct 21, 2005
  7. Because rotating magnetic media is only reliable for short-term
    storage, and because anytime you have it connected to your main
    computer you're vulnerable to certain kinds of events (both hardware
    failures and malware) that will destroy any connected disk. The
    optical media have a *different* set of nasty behaviors :).

    So using both works pretty well.
    David Dyer-Bennet, Oct 22, 2005
  8. Harry

    jean Guest

    I have all of my images on a hard disk, on a collection of CDs, and a
    In addition to CDs and DVDs, I keep the pictures on my main system on a pair
    of drives in a raid 1 configuration and also backed up on a linux system
    which also has a pair of drives in a raid 1 config, then I copy the CDs to
    another linux system at the office (no raid yet, bu it will come)

    Belts and suspenders only is for optimists ;-)

    If computers didn't break, I would be out of work.

    jean, Oct 22, 2005
  9. Harry

    Bill DeWitt Guest

    deloid mentioned in passing :
    Print is dead. If you want to preserve a newsgroup post, write it to
    thumb drive and keep it in your freezer...
    Bill DeWitt, Oct 22, 2005
  10. Harry

    bob Guest

    We're rethinking our backup strategy at the [small] office.

    Over the past 13 years, we have had a lot of hard drive failures, some user
    error, a little computer error, and no viruses [knock on wood].

    Based on our experience, we believe a RAID system would protect us for 90%
    to 95% of our "exposure." For almost all of the other 5% to 10%, a pair of
    removable hard drives will protect us (using them alternately). There is
    still a small risk, but the quantity of data we have is too great to back
    up onto discs. The discs are handy for off site backup of certain files

    bob, Oct 22, 2005
  11. Harry

    clutch Guest

    Heck, you likely would have to find a motherboard with an isa slot to
    plug the esdi controller into.

    clutch, Oct 22, 2005
  12. This isn't crazy, certaintly. Having *two* external drives is
    important, since it means you never have your master data and your
    only backup hooked up online at the same time.

    What it doesn't protect against is loss of a file that isn't noticed
    for a while. In the original poster's application, photo archiving,
    there will be a LOT of files that aren't accessed very often, and that
    could go missing and not be noticed for years. Two external drives
    that you backup to weekly, or something, won't have a copy of a file
    lost or corrupted two years ago.
    David Dyer-Bennet, Oct 23, 2005
  13. Hard disks are NOT backup medias. I use DVD, DLT and DAT for backup. And I
    always keep one copy of the backup at home and one copy in a safty deposit
    Jørn Dahl-Stamnes, Oct 23, 2005
  14. Harry

    Harry Guest

    But why not?

    I would prefer to rely on HD than DVD or CD. When you talk about DAT, this
    is more commonly used for businesses.
    Harry, Oct 24, 2005
  15. Harry

    Norman Guest

    Interesting backup strategy.

    Obviously, you've never had somebody come up to you and request a file
    that they "just" discovered was corrupt, and have to search through
    6-8 months of backups to find a "good" copy. Or, the good old open
    file that isn't backed up for weeks or months because some bozo finds
    it much more convenient to keep the file open for faster access.

    I seem to recall reading somewhere that something like 75% of
    businesses that experience a "disaster" are not in business 2 years

    Good Luck with your "strategy".

    - ---
    Please reply via group. E-mail ID does not exist.
    Norman, Oct 25, 2005
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