Xref: utzoo comp.unix.questions:10013 comp.unix.microport:1921
Path: utzoo!attcan!uunet!visenix!beattie
From: beattie@visenix.UUCP (Brian Beattie)
Newsgroups: comp.unix.questions,comp.unix.microport
Subject: Re: dump/restore
Keywords: cpio is not a real backup program
Message-ID: <195@visenix.UUCP>
Date: 1 Nov 88 22:36:48 GMT
References: <178@celerity.UUCP> <12433@steinmetz.ge.com> <77@usl-pc.usl.edu> <44433@beno.seismo.CSS.GOV> <8373@alice.UUCP>
Reply-To: beattie@visenix.UUCP (Brian Beattie)
Organization: The Department of Redundancy Department, Reston, VA.
Lines: 50

In article <8373@alice.UUCP> debra@alice.UUCP () writes:
>In article <44433@beno.seismo.CSS.GOV> rick@seismo.CSS.GOV (Rick Adams) writes:
>>...
>>A BACKUP program should be able to restore the disk to the state it
>>was at the time of the backup. It should also offer incremental backups.
>
>Right, and since there is no way to reset the create-time on a Unix system
>(except by setting the date and resetting it but that's awful and can never
or writting the inode by writting the raw device as dump/restor does.
>be used in a multiuser environment) there are NO backup programs that can
you should never dump an active filesystem.
>restore the disk to the state it was at the time of the backup since this
>is simply not possible in Unix.
>The only way to restore the disk is if you make a complete image, using
>volcopy or dskcpy or whatever it is called (depending on the Unix version)
or dump/restor if ATT has not castrated you system.
>but those programs cannot offer incremental backups.
dump/restor will do incremental backups just fine.  It is true that
an _incremental_ _restor_ will not set the create time back but that too
could be worked if necessary.
>
>Paul.
>
>-- 
>------------------------------------------------------
>|debra@research.att.com   | uunet!research!debra     |
>------------------------------------------------------

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    _ANYONE_     | Brian Beattie          (703)471-7552
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