Peter Farrell wrote:
2008/6/9 Bowie Bailey Bowie_Bailey@buc.com:
I have two drives in a software mirror. Other than setting the bios to boot from the second drive, is there any way to confirm that grub is installed properly on the second drive?
When installing CentOS - sometimes the RAID-1 /boot partition, usually /dev/md0 fails to boot.
The bug is known and exists on the bugtracker for CentOS as well as RedHat.
The fix is to re-install GRUB on on each partition of the RAID-1 array.
I think you could use the same method to answer your question.
<SNIP>
If you then want to test it, disconnect one of your drives - or just drop into grub at boot and tell it to boot from the partition of another drive.
I already know how to install grub on the second drive. The issue is that this is a production server and I'm trying to avoid rebooting it if possible.
I'm looking for a way to determine whether grub is installed on a drive WITHOUT having to actually attempt to boot from it. If I redo the installation, then I can be sure it's installed, but if it's already there, I'd rather leave it alone. There's no point in messing with it if it's already installed.
Bowie Bailey wrote on Tue, 10 Jun 2008 10:19:34 -0400:
I'm looking for a way to determine whether grub is installed on a drive WITHOUT having to actually attempt to boot from it. If I redo the installation, then I can be sure it's installed, but if it's already there, I'd rather leave it alone. There's no point in messing with it if it's already installed.
You could dd the MBR to a file and then examine both. You could diff them, I think they should be identical, should they?
Kai
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Bowie Bailey -
Kai Schaetzl