Messages in this thread | | | From | Leslie Mikesell <> | Subject | Re: Amanda VFAT Incremental Backups Broken in linux-2.2.1[12] | Date | Sat, 4 Sep 1999 11:36:39 -0500 (CDT) |
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According to Robert de Bath:
> For unix: > > mtime: The time the file was last modified. > atime: The time the file was last accessed. > ctime: The last time _any_ change was made to the file or inode. > > All times are to the second. > > For VFAT > mtime: The time the file was last modified (2 second resolution) > atime: The time the file was last accessed (86400 second resolution) > ctime: The time the file was _created_ (1ms resolution) > > I suppose the unix ctime could be the max of these times. > I don't think I'd trust it enough to backup incrementally even tho it'd > pick up the commonest problem of a single mtime; unpacked zip files.
GNUtar's --listed-incremental mode working on a filesystem with unix semantics covers all the problems including changing owners or permissions and picking up old files that appear in a new location as a result of renaming a directory above. If you are doing backups of a live filesystem you have to live with changes that happen in the current second anyway.
Les Mikesell les@mcs.com
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