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. Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos