I found this situation at a client site and though it was worth brining up:

The client is running openafs 1.8.0-1~ppa0~ubuntu14.04.1-debian, but
I cannot yet vouch for the server versions.

This is a new volume and here are some times from vos exa

    Creation    Thu Aug  9 09:21:40 2018
    Copy        Fri Aug 10 09:58:29 2018
    Backup      Fri Aug 10 10:31:08 2018
    Last Access Fri Aug 10 14:38:59 2018
    Last Update Thu Aug  9 18:29:23 2018

Last night, our parts generator for afs took a snapshot of the vldb/file
servers
about 11:15 p.m. and reported a more recent update time for the volume on a
different file server:

Thu Aug  9 18:30:30 2018

Which is, interestingly, 67 seconds into the future.

I noted that the volume was copied this a.m. but after the parts generator
ran and
after our software noticed the discrepancy about 6:00 a.m. this morning.

I have not confirmed if the volume was copied some time earlier.

The volume is about 200GB.

I'm curious if there is a reasonable explanation for this type of behavior.
I do not recall ever catching something like this before.  I am currently
mining our archive logs to see if I can find another instance.

Kris

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Mr. Kristen J. Webb
Chief Technology Officer
Teradactyl LLC.
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Email: kw...@teradactyl.com
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