[CentOS] Re: Stuck at GRUB

Ugo Bellavance ugob at lubik.ca
Thu Nov 29 14:29:45 UTC 2007

jancio_wodnik at wp.pl wrote:
> Christopher Chan pisze:
>>>>>> grub cannot find its second stage. Are you booting from a mirrored 
>>>>>> partition?
>>>>> Yes
>>>> What could be a solution?  And what could have happen upon the reboot?
>>> That is weird.  I just re-installed centos5 and it is now booting 
>>> properly.  What could I do to avoid this situation in the future?
>> IIRC, RHEL4 does not properly handle installation of grub on mirrored 
>> partitions and therefore Centos4 suffers from the same problem.
>> RHEL5 does it properly now as you can see. This has been a long 
>> outstanding problem of anaconda.
> Yeap, this is true. After installing centos4 on RAID1 disk (software 
> raid) i always do:
> grub
> grub>device (hd0) /dev/hdc
> grub>root (hd0,0)       grub>setup (hd0)
> where /dev/hdc is second RAID DISK (it could be whatever: /dev/sdb1 etc)

Ok, on one system I had /boot as /dev/md0, and md0 is composed of 
/dev/hda1 and /dev/hdb1.

I have done:

grub> device (hd0) /dev/hdb

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)"...  16 sectors are embedded.
  Running "install /grub/stage1 (hd0) (hd0)1+16 p (hd0,0)/grub/stage2 
.conf"... succeeded

Am I in the right way?



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