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тАО06-29-2009 06:42 AM
тАО06-29-2009 06:42 AM
Grub problems with RHEL5.3 Installation on multiple disks
One has a single disk attached (a LUN with single path), the other has two disks attached (2 LUNs, single path).
I can install RHEL 5.3 on the single disk blade.
Although the installation runs on the dual disk system when I reboot after installation I get GRUB problems.
I either get:-
1) Red screen with "Illegal Opcode"
or
2) Black screen with just the word "GRUB".
This is not a GRUB menu, as there is no option to type anything.
I am using all defaults until I can get this issue sorted out.
There is no obvious reason why I get two different errors, but both seem to be to do with the GRUB loader.
Rebooting with a Linux Rescue disk I can see the grub.conf and it looks OK to me (although I am pretty new to RHEL/GRUB).
Any suggestions why a second LUN should cause these issues?
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тАО06-29-2009 07:14 AM
тАО06-29-2009 07:14 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
I have run into this with fiber channel enabled systems.
The work around is to do the install with the fiber cable pulled so Grub does not get confused at install time.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО06-29-2009 09:39 PM
тАО06-29-2009 09:39 PM
Re: Grub problems with RHEL5.3 Installation on multiple disks
Old GRUB (not GRUB 2) has some options with its 'install' command (the GRUB prompt command) to overcome some of those.
Hard to say without knowing more.
Goran
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тАО06-30-2009 12:36 AM
тАО06-30-2009 12:36 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
Only SAN disks which I am installing on.
Therefore I cannot remove the fibre connections during installation.
Is there a location for an improved GRUB loader?
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тАО06-30-2009 02:56 AM
тАО06-30-2009 02:56 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
The grub that ships with RHEL 5.3 is pretty up to date. I would turn to HP for hardware support.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО06-30-2009 05:20 AM
тАО06-30-2009 05:20 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
Cheers.
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тАО06-30-2009 07:49 AM
тАО06-30-2009 07:49 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
I have seen this red screen with some messages issue with RHEL 5 on few blades some time back and reinstalling the grub using recovery mode simply solved the problem.
I haven't came across this issue recently on new blade servers.
simply reinstall the grub.
Good Luck...!
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тАО07-01-2009 01:37 AM
тАО07-01-2009 01:37 AM
Re: Grub problems with RHEL5.3 Installation on multiple disks
When booting from SAN disk (not just EMC) the boot disk must be the disk with the lowest LUN number.
I need to do some further testing on what happens when an additional disk is added at a later stage which has a higher number (which HP do not recommend).
Thanks to everyone who responded. Points have been assigned.