on 10/10/2007 2:46 PM Hugh E Cruickshank spake the following: > From: Les Mikesell >> Hugh E Cruickshank wrote: >>> From: Les Mikesell Sent: October 7, 2007 18:53 >>> >>>> Then reinstall grub on the drive. >>> Now I have some questions: >>> >>> 1. Since the /boot partition was mirrored and will be restored on the >>> new sda drive I do not really want to do a full grub install. From >>> what I have read that will overwrite existing /boot/grub/grub.conf >>> file. So I just want to write the MBR on the drive. How to I do >>> that (the docs I have found were rather unclear on that aspect)? >>> >>> 2. Can a install grub on the replaced boot drive with the system still >>> running? >> Yes, after the /boot partition re-sync has completed, execute grub and: >> >> root (hd0,0) >> setup (hd0) >> quit >> >> If you aren't able to keep the system running while doing the swap, you >> can also do this from the rescue mode boot, but you should have the >> contents on the /boot partition first. >> > > Sorry to be obtuse here but I just want to make very sure of what I am > doing before I do it. Will the "setup" command only write the MBR? > >>From my reading the GNU GRUB manual I got the distinct impression that > the "setup" command will also write/rewrite the /boot partition (which > I would like to avoid). The documentation for the setup command states: > > Set up the installation of GRUB automatically. This command uses > the more flexible command install (see Section 13.3.18 [install], > page 44) in the backend and installs Chapter 13: The list of > available commands 49 GRUB into the device install device. If > image device is specified, then find the GRUB images (see Chapter > 10 [Images], page 29) in the device image device, otherwise use the > current root device, which can be set by the command root. If > install device is a hard disk, then embed a Stage 1.5 in the disk > if possible. > > The option �--prefix� specifies the directory under which GRUB > images are put. If it is not specified, GRUB automatically > searches them in �/boot/grub� and �/grub�. > > The options �--force-lba� and �--stage2� are just passed to install > if specified. See Section 13.3.18 [install], page 44, for more > information. > > The second paragraph tends to imply that /boot/grub will be written > to by default and I do not think that this is what I want to happen. > > Thanks again for everyone's input (especially Les). It is greatly > appreciated. What "setup" command? You boot from a rescue disk if your system isn't running already. If booting from rescue disk chroot to your installed files. execute grub at its prompt run the following; root (hd0,0) setup (hd0) quit That should let you boot into your stuff. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!!