in reply to (OT) Redundant Backup

i don't know if this would help or not

have you heared about MD5 CheckSum ?

you can copy all the images along with thier MD5 Keys

to a new HARD Disk

Check once per month for un-matched values and replace the currpted photo

Check if there's photos with out MD5 Key ... make a key for it and save it with other keys

BTW havent tryed to do this before ... just heared about it :P

and wanted to help

bye

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Re^2: (OT) Redundant Backup
by fundflow (Chaplain) on Mar 27, 2006 at 22:42 UTC
    Thanks for the suggestion. Using hashing is indeed good for checking data integrity. As you said, if a file is corrupt, one may hope to find a good copy elsewhere.

    I want to achieve more than that. Using ECC, one can hope to be able to handle corruptions and so, a backup may still be good even if several bytes/blocks/sectors did go bad.

    Storage is very cheap today. This means that increasing the size with redundant ECC information does not cost much. Another way to look at is that since storage _is_ cheap, one shouldn't count on it too much and devise a way to still maintain its reliability.

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