On Tue, 2009-12-29 at 06:04 +0800, Isaac Dupree wrote: > > Option 1~3 requires the recover has the knowledge of the backup file > > format somehow, but a simple dd is enough for option 4. What do you > > think? > > If the partitioning had been changed in the mean time, 4 would overwrite > it with the older values. Similar problem for a weird setup with > partitions in between (I dunno, might be possible with GPT or other > weirdness).
Good point. > I think option 2 or 3 is soundest. Option 2 would have three separate > files of information, (right?), and there must be a pretty > straightforwards `dd` option to skip to the correct start position. > Option 3 would omit the "start position" file... but that file is really > cheap, maybe we'd better keep things simple for restorers and stick with > three separate files.(Or, we could do something weird like putting > start-position somewhere in the filename of the backup.) This requires the restorer to understand the role of each of the 3 (or 2) files and use `dd' twice with correct options. So an important thing is, we need to document this somewhere. And I think the best place is to "document" it in the grub-install script. Because this will enable the not-so-advanced user to recover her boot sectors easily as well. If we decide so, we go back to option 1 (my original implementation). Because the backup file format is not important any more as it is totally transparent to the restorers. Am I right? Thanks, -yi _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
