> Just like disaster recovery plans, many people fail to realize ( or > admit) that the "unthinkable" will eventually happen...in digital > photography that means media and formats will change with time...and > probably sooner rather than later...
> Media-wise, CD/DVD write once media has an approx 100 yr life > expectancy. Unfortunately, 5in CD/DVD disk readers will not exist in > 100 yrs.
> Just like bakelite cylinders or wire spools for voice recordings are > not available (and neither are the players except for museum > specimens), they will go the way of the proverbial "Dodo". I do > photography as a hobby, but computers as a profession. Since 1975, I > have seen the following storage media come and go ( or going) > .....each "ruled the roost" for several years until it was replaced. > Many would be very difficult or impossible to find equipment for > today.....
1) Paper tape 2) 2in wide mag tape ( in proprietary formats) 3) paper punch cards 4) 12 in "hard disk platters" of a whopping 2Mb/disk) 5) 9in reel-to-reel mag tape (still in use at big shops) in several recording densities 6) 8in floppy disks 7) 5.25in floppy disks ( in single & double sided formats), in 180Kb, 360Kb, 720Kb, 1.2Mb densities 8) cassette audio/data recording tape 9) a variety of Iomega/Syquest removable drives ( some still in use but fading) 10) 5in CDs, and DVDs ( currently popular) but a smaller 2 in format is starting to appear that holds the same amt of information, so.... 11) USB/Firewire/parallel removable drives (mostly current or up and coming).
Whatever you go with, remember that you will eventually have to "convert" them to a new media or format (remember that JPEG and TIFF will also eventually be replaced by something faster, more expandable, and that does a better job...there is no standing still in the world of technology or software).
If you have 50,000 negatives scanned on 5,000 DVDs ( my 6x6 scan at 400+Mb/image) in 10 yrs, you will need to convert them sooner or later. And that will be a large undertaking.
You may want to start NOW figuring out the best way to organize and store them so that your future conversion is not a nightmare. Points to consider are....
Pick some media and format that is widely supported ( TIFF and CD/DVD for ex&le are the current 'top' contenders). Be careful of how you save them to disk ( a ISO9660 CD format is more likely to be around/supported longer than any "native" file system). If you use a mix of image formats over the years, make sure it is readily identifiable ( including byte order if necessary for the different cpus etc that will be used over the decades to come). Be careful of the habit of sticking images in "folders"...future conversion software may or may not 'automatically' look recursively through directories.
We could go on and on, but you get the picture. Digital imaging is running very fast, and plans to handle the eventual obstacles are woefully far behind.