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Re: Booting sparkly new F12 install, error 13 from grub.

On Wednesday 09 December 2009, Gene Heskett wrote:
>On Wednesday 09 December 2009, Bill Davidsen wrote:
>>Gene Heskett wrote:
>>> Greets;
>>> Resend as there has been no reply, with added info.
>>> I finally said to hell with it and let F12 install itself on /dev/sdb
>>> with all its defaults.
>>> I was surprised on the reboot when my usual grub menu from
>>> /dev/sda was all that showed up, no mention of an F12 install at all.
>>> Added: I had it install everything in the options list, but gave it only
>>> /dev/sdb to play with in the available disks menu's, & use the defaults
>>> on /dev/sdb, so it made a  100 meg /boot, using ext4, and a logical
>>> volume out of the rest of the drive.  I have NDI how to query the
>>> filesystem used there, other than trying to mount /dev/sdb1 as ext3
>>> fails.
>>> So, since I had blown away a centos install to put F12 on /dev/sdb, I
>>> carved up a fresh grub stanza that reads like this and added it to
>>> /dev/sda1/grub/grub.conf:
>>> # grub.conf generated by anaconda
>>> #
>>> # Note that you do not have to rerun grub after making changes to this
>>> file # NOTICE:  You have a /boot partition.  This means that
>>> #          all kernel and initrd paths are relative to /boot/, eg.
>>> #          root (hd0,0)
>>> #          kernel /vmlinuz-version ro root=/dev/sdb3
>>> #          initrd /initrd-version.img
>>> #boot=/dev/sda
>>> default=19
>>> fallback=1
>>> timeout=15
>>> splashimage=(hd0,0)/grub/splash.xpm.gz
>>> [...]
>>> #21 new stanza
>>> title	Fedora 12 ( from dev/sdb)
>>> 	root (hd1,0)
>>> 	kernel /vmlinuz- ro root=/dev/mapper/vg_coyote-
>>> lv_root  LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc
>>> KEYTABLE=us rhgb quiet
>>> 	initrd /initramfs-
>>> which is in fact pasted from the /dev/sdb1/grub/grub.conf except for the
>>> initial "root (hd1,0)" statement.
>>> So it looks as if I might have to 'chainloader +1 ' it instead, so how
>>> do I do that?  I've never done that before.
>>> Also, that /dev/sdb1 partition only mounts as ext4 if that is important.
>>> Added: I experimentally added a 'chainloader+1' as the next line after
>>> the root (hd1,0) in the /dev/sda1/grub/grub.conf, but all that seemed to
>>> do was add another 10 second delay before I get the error 13 message.  I
>>> would have thought from what little I know about grub, that this should
>>> force a reload, effectively a grub restart, from the mbr of /dev/sdb. 
>>> Is there something I need to change in the /dev/sdb1/grub/grub.conf
>>> also?
>>If you don't get an answer sooner, when I go to the part of the building
>> where my laptop sits I'll check the stanza I used, as it still has a
>> fallback fc10 present. In the meantime, you can try booting off sdb,
>> using (typically) the F12 key to enter the boot manager. I suspect the
>> boot info is in the MBR of sdb.
>Well, according to the files present on /dev/sdb1, grub is installed.  I
>tried the chainloader+1, didn't work, now I'm about to reboot and try the
> map syntax to swap the bios drive orders.
>Thanks Bill.
And that didn't work either. :(

Next question:  I've edited the F12 version of grub/device.map to include all 
drives in their sata# order.  It had only "(hd0,0)	/dev/sdb" before.

I see by the grub file on the F12-x64 dvd that it is still grub-0.97 so it 
isn't grub2, which I initially thought might be the problem.

Is it safe to do a "grub-install /dev/sdb" from an F10 boot?

Or from a rescue session from the F12 dvd?

Will that destroy the existing boot from /dev/sda?

Cheers, Gene
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