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I'm trying to move a site to a different computer. Copied (with -p) the Data.fs, started the new Zope (2.6.2). Everything seems fine, but when trying to pack I get:

Error Type: CorruptedError Error Value: /usr/local/Zope-2.6.2-src/var/Data.fs:5733365: time-stamp reduction: 03431be874d772d5 <= 034be54b5ea3dedd

It's possible that your new computer's time is screwed up relative to the previous machine.

Set the time on the new machine just ahead of that on the old. Might work. Later you'll want to set your time to the "correct" value. Take a look at ntpdate for that.

Solved it by running fsrecover.py on the orgininal Data.fs