Re: chainloader +1, again

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On Tuesday 23 March 2010, Michael Schwendt wrote:
>On Mon, 22 Mar 2010 17:10:49 -0400, Gene wrote:
>> On Monday 22 March 2010, Will Walthall wrote:
>> >So I made the assumption that your part layout was /dev/sdb1 f10
>> >system, /dev/sdb2 f12 system.
>> >
>> >Option #1 Install grub to the MBR of /dev/sdb
>> >Option #2 Install grub to the partition of /dev/sdb1
>> >
>> >Lots of things you need to consider, one you dont want to break
>> >
>> >Do you Chainload into mandriva aswell? is the Mandriva boot installed
>> >to MBR /dev/sdd or in the partition /dev/sdd1?
>> >
>> >Steps I would take:
>> >:Reinstall grub to the MBR of /dev/sda and make sure that it has these 3
>> >: devices
>> >
>> >-grub prompt in f10-
>> >device (hd0) /dev/sda  //f10
>> >device (hd1) /dev/sdb  //f12
>> >device (hd2) /dev/sdd  //mandriva
>> >root (hd0,0)
>> >setup (hd0)
>>
>> This did not return any errors, so I am off to try it.
>>
>> And, and hour later, it failed, error 13. Invalid file format or some
>> such drivel.
>>
>> The hour was because it decided to do an e2fsck on /usr, which is
>> something over half a Tb.
>>
>> >Option #1
>> >
>> >:Reinstall grub to the MBR of /dev/sdb
>> >
>> >device (hd0) /dev/sdb  // This grub is isolated from the MBR one on
>> >/dev/sda so I believe this is correct, I've never done something like
>> >this personally, though I've messed around with grub alot
>> >root (hd0,0)
>> >setup (hd0)
>> >
>> >: Make sure all your entries in menu.lst for f10 are correct
>> >
>> ># Again I think this is correct, though I haven't done anything like
>> >this, I have chainloaded into grub installed to a partition, but not
>> >into one installed to another MBR on a seperate drive
>> >title Fedora 12
>> >root (hd1,1)
>> >chainloader (hd1)+1
>>
>> Now I have done this, and will try it.  And this reverts to the grub
>> screen from /dev/sda in about 4 seconds, silently.
>
>Why did you try that?  root (hd1,1) expands to /dev/sdb2 which is not
>what you had referred to earlier.
>
>  # load boot sector of first partition (sdb1)
>  title Fedora 12
>  rootnoverify (hd1,0)
>  chainloader +1
>
>Assuming that F12's GRUB _really_ is installed in /dev/sdb1 and NOT the
> MBR.

And I repeat, at the initilization screen, I told it to put it in the mbr of 
/dev/sdb.  No idea if it did.  But now I'll redo it (the whole install) and 
have it put there.

>And if it's installed in the MBR, you could boot F12 by changing the boot
>order in your BIOS, then use "grub-install" to (re-)install the boot
> loader. Make sure that you don't mix /dev/sda1 and /dev/sdb1 when running
> grub-install.

If its that complex, how then do I install grub in /dev/sdb1? Easier to 
reinstall, I want /root and /usr both on their own partitions anyway.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)

If your bread is stale, make toast.
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