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Date: Thu, 2 Dec 2004 07:54:19 -0600
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Thread-Topic: 4.x can't read 5.x dump? 
thread-index: AcTYZfizztuqjhqlS320xIRUsmxDlwAD/t5w
From: "Jaime Bozza" <jbozza@thinkburst.com>
To: "Nick Barnes" <Nick.Barnes@pobox.com>,
	"Ken Smith" <kensmith@cse.Buffalo.EDU>
cc: Joel Hatton <joel@auscert.org.au>
cc: freebsd-stable@freebsd.org
Subject: RE: 4.x can't read 5.x dump? 
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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