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Date:      Thu, 2 Dec 2004 07:54:19 -0600
From:      "Jaime Bozza" <jbozza@thinkburst.com>
To:        "Nick Barnes" <Nick.Barnes@pobox.com>, "Ken Smith" <kensmith@cse.Buffalo.EDU>
Cc:        freebsd-stable@freebsd.org
Subject:   RE: 4.x can't read 5.x dump? 
Message-ID:  <E5797C35DEFA014A96C2171380F0EEE454CDB7@bacchus.ThinkBurstMedia.local>

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>There's no theoretical reason why the formats used by dump and
>restore shouldn't be forward and backward compatible, allowing
>an older restore (to an older filesystem type) to pick out the
>parts of the dump which make sense to it while ignoring parts
>which it doesn't understand.
>
>But they aren't, so it can't, so you're out of luck.

This is a pretty interesting issue that I didn't realize.  I've
regularly
restored dumps from a Solaris 8 machine to my FreeBSD 4.x machines.  (We
had data volumes on some old Solaris machines that I replaced with
FreeBSD.)  I guess FreeBSD and Solaris volumes are similar enough that
the restore just worked.


Jaime Bozza



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