Grub

[Karl Larsen]

jdow wrote:
> From: "Karl Larsen" <k5di at zianet.com>
>
>>    All computers have a bios that does many things. The one thing I'm 
>> interested in today is it's assignment of hard drives that are ide 
>> devices. On my bios it reads the hard drive and finds out if it is 
>> set as a Master or a Slave. It puts them in it's list in that way. 
>> There is a cable select thing which requires a special cable which I 
>> do not have.
>>
>>    Once it has the hard drives assigned the bios is done. Now in 
>> Linux there is the new Grub which is pretty simple. It stores all 
>> it's stuff at /boot/grub/ and it puts the file grub.conf in /etc/. It 
>> needs to put some information in the Master Boot Record part of a 
>> hard drive so it can read that information and boot the proper system.
>>
>>    Getting grub working has been a simple task. I learned from this 
>> list that all you need to do is start grub in a root terminal and 
>> once it comes up do this:
>>
>>    1. Tell grub which root you want to boot with: #grub> root (hd1,5) 
>> and hit enter. It will say what kind of partition it found.
>>
>>    2. Now let grub put this information into the MBR with:
>> # grub> setup (hd0) which will put the data onto the first hard 
>> drive's MBR.
>>
>>    This works fine on FC6 and earlier but it fails on F7. There are 
>> those who think it is the bios which is changing. They are wrong.
>
> Karl, there is a reason RedHat and Fedora use labels for mounting file
> systems rather than the old /dev/hda.
>
> One GOOD reason now is that the drives are now declared differently.
> What used to be /dev/hda is now /dev/sda. There are no problems at
> all if you are using labels for booting. You can also change drives
> around at will, as long as the proper drive is used for booting.
>
> I have taken the labeling one step further than I remember RedHat
> taking before. I labeled the FC7 install with a "-7" at the end of
> the label to make it distinguishable from the others. So I have
> things like sda0 is labeled "/boot-7" and so forth.
>
> {^_^}   Joanne, also a ham.
    Right this moment grub.conf and fstab have labels where they can be 
used. I like it fine but learned that if I use software RAID I can't use 
labels. So it depends what I do.



-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.