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Comment by esbwhat | Hacker News Reader

Hope you're accomodating for bit rot with your SD cards

Yes, by backing up to my local RAID array and then syncing with S3. I just figure it's not worth re-using the SD cards and they're an extra backup.

I actually figured out every photo I take has

  - one copy on the SD card
  - two mirrored copies on my raid
  - 3 copies on S3
  - 3 copies on flickr (I believe)

for a total of 9!

DVDs safer?

Burned DVDs last between 5-10 years, depending on the quality of the media, as well as storage temperature, humidity, handling, etc. After that, data begins to "evaporate".

Flash memory depends more on write/erase cycles. Infrequently used media can theoretically last for decades, and is much more resilient with respect to storage and handling. Then again, in 25 years, how easy will it be to find a USB reader?

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