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Re: recover currupted files
On Sun, 12 Aug 2007 17:04:09 -0400, "Richard Urban"
>A corrupted file is a corrupted file.
Is - OK.
>It may not just have missing information. The remaining information
>may be scrambled.
May - that's the difference.
It is within that "may" space that one recovers data that is indeed
corrupted, but has not been overwritten.
>If what you preach is so, Drive Savers, On Track (and others of
>their kind) would be able to recover all files, all of the time. They
>can't - because they are - guess what -- corrupted!
If what *you* preach is so, Drive Savers, On Track (and others of
their kind) would never be able to recover any files, any of the time.
They often can - even though they are - guess what -- corrupted!
So yes, I would not tell folks "don't bother to make backups, we can
always recovery your data if something goes wrong".
But no, I would not just throw up my hands and give up, just because a
file is lost or even corrupted. That's just the starting point for
recovery attempts, which do not have to be a costly
freight-HD-to-clean-room affair to give at least some results.
By definition, a backup is not identical to the original, because
whatever misfortune befell the original has not destroyed the backup.
IOW, backup means scoping in all wanted changes and scoping out all
unwanted changes. How is this miracle of scoping attained?
It isn't. Backups usually lack some wanted material as well as the
unwanted disaster you are hedging against, or they are so close to the
"live" data that thay have been equally hit by misfortune.
Backup may let you get back most stuff, assuming it has been done
effectively, that the backup is not barfed, and that it can be
restored. When the backup also fails or is not there, or where it is
incomplete, recovery aims to bridge the gap.
Telling me that data recovery doesn't work is like telling Chuck
Yeagar that man will never fly. I break that rule for a living.
But Chuck Yeagar won't tell you planes don't crash, and I won't tell
you that data recovery is always possible.
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