On Friday 25 July 2014 15:59:37 Jon LaBadie did opine And Gene did reply: > On Fri, Jul 25, 2014 at 02:45:50PM -0400, Gene Heskett wrote: > > Greetings; > > > > It turns out some of my backups for this machine will not be usable, > > particularly for a bare metal recovery on a new drive, due to a miss- > > understanding of the --one-filesystem option by tar-1.27, and 1.27.1 > > does not fix it. > > > > The problem is that this system is currently installed with two > > partitions, 3 actually if you count swap space. > > > > They are /boot, and / > > > > So tar refuses to back up a softlink that points to a directory/file > > that is in a different dir than the current disklist entry points > > to, EVEN THOUGH IT IS IN FACT on the same filesystem. > > > > The config I've been using for a decade and change uses that option > > command. Will removing it (--one-filesystem) from my config fix this > > missing links in the backup problem? Or will that result in its > > making a duplicate backup file of what is at the end of that > > softlink? > > > > IMNSHO, when tar encounters such a link, instead of making a backup > > of that file at the end of the link, it should backup the contents > > of the links text so that an amrecovery will re-create the link > > file. > > > > It is not doing that either, so how do, or can, I force tar to do > > that and result in a fully usable backup? > > > > This does not seem to me to be a violation of the one filesystem > > command, making sense ONLY if the link is to a different partition, > > which could be a different filesystem, which this present situation > > is most certainly not. Different directory yes, different > > filesystem, no. > > I don't think --one-file-system has anything to do with it. That > option deals with encountering a directory that is on another > filesystem and whether tar should backup what is in, and below, that > directory. > > The option for dealing with symbolic links is --dereference (-h). > Without that option the symbolic link is archived regardless of > the location of the target and regardless of the --one-file-system > option. With the --dereference option the target is archived, > again regardless of location and --one-file-system option. > > Jon
Jon, I should defer to your knowledge, but I just did an amrecover on my lathes control box, and had to re-create several missing softlinks to bring it up. I probably don't have them all fixed yet, but it is running. The tar on those boxes is 1.22. Thanks Jon. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
