Date: Mon, 14 Mar 2005 12:20:52 -0500 (EST) From: Jerry McAllister <jerrymc@clunix.cl.msu.edu> To: svein.h@lvor.halvorsen.cc (Svein Halvor Halvorsen) Cc: freebsd-questions@freebsd.org Subject: Re: What's the easiest way to do a backup and verify? Message-ID: <200503141720.j2EHKqw16442@clunix.cl.msu.edu> In-Reply-To: <20050314172547.Y81679@maren.thelosingend.net> from "Svein Halvor Halvorsen" at Mar 14, 2005 05:28:26 PM
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> > > * Jerry McAllister [2005-03-14 10:30 -0500] > > > [...] So then wouldn't a second dump of the same snapshot diffed to > > > the tape device be a good for a verify? > > > No, because the condition of the files that you are dumping the second > > time is different from the first time. > : > > Most places cannot afford to make file systems completely unavailable > > for periods of time long enough (several hours, up to a couple of days) > > to allow dump to be run twice without any changes being made to the > > file system. > > > Note the OP's use of the word "snapshot". I think he is right! Or if he > isn't; it has nothing to do with the filesystem beeing changed, but rather > something to do with the way the backup is written to tape. However, I do > think snapshots could be used for exactly this. But, if he is writing a snapshot, then why is he using dump? I think he was using the word snapshot to imply the dump file. But, of course, I could be wrong. ////jerry
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