Re: Backups in the 20+ Mpix FF era

David Ruether wrote:
"Alan Browne" <alan.browne@xxxxxxxxxxxxxxxxxxxxx> wrote in message news:34idnU9HJoVad4PUnZ2dnUVZ_vjinZ2d@xxxxxxxxxxxxxxx

My new camera will be producing ca. 35 MB raw files. Maybe 32 MB when converted to DNG. That's 780 raw files per 25 GB BluRay disk. (Less as I'll archive the jpg's too).

I'm considering BluRay for archival backups and I'm glad to see that Delkin have begun shipping archive (Au based) disk, though at a very high unit cost, it comes to about $1/Gig (25 GB disks). (Buy a 25 unit spindle and it's a buck less per disk.)

In time I hope the price of BluRay Media goes down, of course, as well as becoming dual layer (50 GB).

... or ...

1 TB drives are in the $300 range, so cheaper to buy two separate firewire 800 units and backup to those which would hold some 31,000 DNG's each. I can daisy chain these to my current 1 TB drive.

Thoughts?

I have doubts that any Blu-ray disk will be worthwhile for
archiving (let alone standard DVDs), manufacturers' claims
notwithstanding. Even external hard drives that are stored
or are in continuous use are, I gather, not very reliable.
Best, perhaps, would be pairs of internal drives that run
continuously when the computer is on, or pairs of external
drives that are run for fairly short periods (for reason of
heating) on a periodic basis (to prevent freeze-up).

That's my current setup. But it is not fireproof.

Ah,
the advantage of film - it just sits in the dry darkness with
relatively little change for decades

So do 'gold' archive CD/DVD/BRD. It is a well proven (accelerated life cycle testing) storage media. Keep it in benign conditions (as reasonable as negatives/positives) and it will outlast you (and your grandchildren too in all likelihood). 1 copy at home, 1 copy at work or at a relatives or friends house.

This is where I'm leaning (BRD) for future backups as well as consolidating the current pile of disks.

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