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.
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