On 04/08/2013 11:02 AM, Bill Davidsen wrote: > Dan Thurman wrote: >> >> Since I was unable to install F18, I would like >> to revert back to F17 that I have restored from >> backups, the following partitions: >> >> / (root) /dev/sda10 >> /boot /dev/sda9 >> > Did you make a physical backup of the partitions with dd or just back > up the files on them? Yes it makes a difference in recovery... I use rsync to save a backup of both partitions on another drive (both / and /boot), then I reformatted the sda9/10 in prep for F18. Having failed to install F18, I then rsync from sdb9/10 back into sda9/10. I just forgot how to use Grub2 exactly in order to restore MBR on sda9. I have done MBR installs many times before but it has been awhile for grub2! > >> What I have left to do is to restore the MBR >> on /dev/sda9 /boot partition. >> > MBR isn't on a partition, that may be your issue. That is exactly the issue. I need the proper setup to mount, chroot & grub2-install in order to install MBR onto sda9 to make the partition(s) "seen" by grub. > >> I have a separate MBR installed on /dev/sda >> drive which is the master MBR for multiboot >> OS, which is working fine. >> > MBR means "Master Boot Record," so "master MBR" seems like something > from the department of redundancy department. And if it's working fine > I really don't understand your problem. Right. You can install MBR onto a partition as well as the whole drive. > >> What steps can I use to accomplish this? >> > Could you clarify "this" a bit, in terms of what you hope to > accomplish, rather than how you are trying to do it? I'll try to help, > and there are at least two people on this list who are better at boot > issues than I am, so you can probably get a solution once we have an > idea what you are trying to do. > As I barely recall, for OSes using grub2, for F17, I have to boot LiveCD or DVD, mount the F17 (root & boot) partitions, chroot to the mount point, and then run grub2-install with the correct arguments. These are the details I am looking for. For example, If one is using grub1 based partitions, it is a simple task: # To find your GrubX boot partitions: grub1 grub1> find /grub/stage1 ### to locate grub-1 boot partitions (hd0,4) ### This partition is the "MBR" for the drive, sda (this is my master grub list) (hd0,6) ### This partition is the "MBR" for F13 (shows grub kernels) grub1> find /grub/grub.cfg ### to locate grub2 partitions [hd0,8] ### This partition is the "MBR" for F17 (is missing cuz it is not yet setup) (hd0,10) ### This partition is the "MBR" for Ubuntu-10 # To setup Grub-1 "MBR": grub1> root (hd0) ### sda (whole drive) grub1> setup (hd0,4) grub1> root (hd0,4) ### sda5 partition grub1> setup (hd0,4) grub1> root (hd0,6) ### sda7 partition grub1> setup (hd0,6) grub1> quit But one cannot use grub1 to install grub2 based partitions as explained above. I hope this is clear (as mud?) ;) -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
