Date: Tue, 29 Jun 2004 09:51:05 -0400 From: "Kevin A. Pieckiel" <pieckiel+freebsd-questions@sdf.lonestar.org> To: freebsd-questions@freebsd.org Subject: Snapshot question Message-ID: <20040629135105.GB27491@SDF.LONESTAR.ORG>
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Greetings! I use filesystem snapshots when I backup my filesystems. I backup to tape and I ALWAYS read back the backup and compare it to the snapshot to verify the data was written correctly. I use FreeBSD 5.2.1-p6, and my tape drive is an Exabyte M2 drive. When I do my compare of my tape against my snapshot, it's not uncommon for one or two files (always the same files) to be different. The most usual culprit being my winbindd_cache.tdb file for Samba. I thought the snapshot would not change over time as the files on the filesystem change. Does this definitively indicate this particular file isn't being written to tape correctly most nights? (Yes, I *AM* backing up my snapshot and comparing the backup to my snapshot, not the live filesystem.) I doubt it, since I've gotten differences in this file on four different tapes, all brand new. What does this mean? Is there a problem, or am I missing something? Thanks, Kevin
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