Anyone understand GRUB?

[patrick kapturkiewicz]

>----- Message d'origine ----
>De : Kurt Wall <kwall at kurtwerks.com>
>? : Linux tips and tricks <linux-users at linux-sxs.org>
>Envoy? le : Mercredi, 29 Novembre 2006, 23h12mn 01s
>Objet : Re: Anyone understand GRUB?


>On Wed, Nov 29, 2006 at 09:52:54AM -0600, Michael Hipp wrote:
>> My system boots off a RAID1 SCSI but has a potload of IDE disks after that. 
>> I'm trying to figure out what to put in /boot/grub/menu.lst so it will boot 
>> faithfully from either SCSI disk.
>> 
>> Here's what I currently have (somewhat leftover from when I had only IDE disks):
>> 
>> title           Ubuntu, kernel 2.6.15-27-server SCSI Disk1
>> root            (hd0,0)
>> kernel          /vmlinuz-2.6.15-27-server  md=0,/dev/sda1,/dev/sdb1
>>                  md=1,/dev/sda2,/dev/sdb2 md=2,/dev/sda3,/dev/sdb3
>>                  md=3,/dev/hda1,/dev/hdc1
>>                  root=/dev/md1 ro quiet splash
>> initrd          /initrd.img-2.6.15-27-server
>> savedefault
>> boot
>> 
>> That 'kernel' line is all one line but I wrapped it here for readability sake. 
>> Here's what the md devices mean:
>> 
>>    md0  /boot
>>    md1  /(root)
>>    md2  swap
>>    md3  bulk data storage (not need for booting)
>> 
>> The 'root' line is what bugs me. I think hd0 properly refers to sda since I 
>> have BIOS set to boot SCSI first. (How to verify that?) But why does it boot 
>> properly using the '0' partition (that's /boot). And what do I put in to allow 
>
>hd0 refers to the first disk. It boots properly because (hd0,0) is where 
>/boot lives, and /boot contains grub/ (/boot/grub).
>
>Kurt

Also, the first disk (hd0) is reported in /boot/grub/device.map
Patrick


	

	
		
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