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From: jpn@teddy.UUCP (John P. Nelson)
Newsgroups: comp.unix.questions
Subject: Re: File system problems
Message-ID: <4221@teddy.UUCP>
Date: Mon, 27-Jul-87 14:02:41 EDT
Article-I.D.: teddy.4221
Posted: Mon Jul 27 14:02:41 1987
Date-Received: Tue, 28-Jul-87 07:15:32 EDT
References: <8467@brl-adm.ARPA> <1052@mind.UUCP>
Reply-To: jpn@teddy.UUCP (John P. Nelson)
Organization: GenRad, Inc., Concord, Mass.
Lines: 20

>In article <8467@brl-adm.ARPA> KFL@AI.AI.MIT.EDU (Keith F. Lynch) writes:
>>He has also said that after using doing a restore of a zero level dump,
>>it is necessary to immediately do another zero level dump

In article <1052@mind.UUCP> barry@mind.UUCP (Barry Lustig) writes:
>And even more garbage.

Most of what the "Sun representative" is supposed to have said was just
that:  garbage.  Interestingly, this part is NOT garbage.  Oh, not doing
another level 0 dump will not trash the filesystem, but it COULD render
all subsequent incremental backups useless.  To quote from the "restore"
manual page:

     A level zero  dump  must  be  done  after  a  full  restore.
     Because  restore  runs  in user mode, it has no control over
     inode allocation; this means that  restore  repositions  the
     files,  although it does not change their contents.  Thus, a
     full dump must be done to  get  a  new  set  of  directories
     reflecting the new file positions, so that later incremental
     dumps will be correct.