I just think this might work I am using scsi drives so would I use root (sd0) I tried it but it said error while parsing number I tried root (hd0) and it said filesystem type unknown, using whole disk I stopped at that point worried I might mess up the whole thing I have read other links that talk about doing it this way $ grub grub> device (hd0) /dev/hdc grub> root (hd0,0) Filesystem type is ext2fs, partition type 0xfd grub> setup (hd0) Checking if "/boot/grub/stage1" exists... no Checking if "/grub/stage1" exists... yes Checking if "/grub/stage2" exists... yes Checking if "/grub/e2fs_stage1_5" exists... yes Running "embed /grub/e2fs_stage1_5 (hd0)"... 15 sectors are embedded. succeeded Running "install /grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/grub/stage2 /grub/grub.conf"... succeeded Done. do I need the device line first? Thanks Peter Farrow wrote: > You can replace the boot loader as follows: > > 1)Boot in REscue mode, and get a command prompt > 2)Run grub, if your two disks are for example /dev/hda and /dev/hdb > and the boot partition is the first on each: > grub> root (hd0) > .... > grub> setup (hd0,0) > ... > grub>root (hd1) > ... > grub>setup (hd1,0) > ... > grub>exit > > This will put a stage1 boot loader on each disk, you should be able to > boot the originally non-bootable disk now. Make sure you boot in the > bios from the second disk, (which I presume is the one you want to > keep), to make sure you could disconnect the original drive first and > boot the system to try it. > > You might find this article useful. > > If the first disk has now been fixed but contains no data, you can > export the partition table from the second disk using sfdisk, and > re-import it on the first hard disk using sfdisk again, you can then > use mdadm to hot add the first (replaced) disk to the second (running > and now bootable) disk. > > Regards > > Pete > > > > Mace Eliason wrote: >> Trying a different approch. >> >> Senario >> >> Raid 1 setup >> Bootable raid drive failed >> Mirror has been working for almost a month and then rebooted >> Now can't boot mirror drive grub not mirrored from other drive. >> >> I Fixed bootable drive. >> Question? >> >> Can I hook up both drives and boot fixed drive then rebuilt mirror >> from nonbootable drive to bootable drive? >> >> Does the raid automatically rebuilt when I boot with both drives? >> Can I run a command to rebuilt from one drive to the other and visa >> versa >> >> I want to try it but I am worried that if I hook them up and it boots >> that because the bootable drive has older info it might over write >> the other drive. >> Thanks >> >> Can't seem to figure out how to get the other drive bootable. >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > >