On Fri, 14 Sep 2012 23:06:42 +0200, lee wrote: > Hendrik Boom <hend...@topoi.pooq.com> writes: > >> It has been my practice when upgrading between Debian releases to make >> bootable copies of the OS partitions on my hard drive so that if things >> go badly wrong I still have a bootable system. > > How did you make such copies?
Usually by tar piped into untar. Sometimes supplemented by rdiff-copy in case anything changed during the copy. This makes it easy to change the file system while I'm at it. Occasionally useful. No, I didn't use dd, or anything that might co[y the UUID. > >> This wprked fine with LILO and GRUB 1, where I was in control of >> configuratino files and could explicitly specify which root partitions >> went with which boot partitions/ >> >> But when installing grub2 to an MBR. all this is automated. It looks >> around on the available disks and figures out shoch partition goes with >> which. >> >> Of course, after I've made my copy (with slight changes to /etc/fstab) >> I have two nearly identical sets of partitions, so it may be tricky to >> tell them apart. Is grub2 clever enough to figure it all out anyway? >> And what data does it use to this end? (so I can make sure it's right!) > > Are you referring to grub figuring it out when booting or to grub > figuring it out while it's being installed? (In any case, I don't know > any of the answers ...) Presumably while installing grub. WHile booting, grub2 has precious few decisions to make -- it's pretty well all scripted from the configuration file. > > There needs to be a way for grub to figure out where to look for its > configuration. Perhaps this information is stored in the MBR when > installing grub. In that case, you would have a problem when grub > cannot find its configuration there anymore (like because the > partitioning has changed) and maybe a problem if it finds the wrong > configuration. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/k30o9g$5pk$5...@ger.gmane.org
