[NTLUG:Discuss] Grub assistance

[Mike LaPlante]

Sorry to keep everyone in suspense. I got it working this weekend when I 
finally got time to mess with it. Downloaded a Fedora 7 rescue CD, which 
I was really hoping to avoid, but in the end it didn't take long to 
download and was the quickest way to go about it.

Shutdown the system, re-ordered the drives, booted up the CD. The F7 
rescue disk walks you straight through getting into a chrooted 
environment. I ran grub-install /dev/sda, it spit out some output that 
looked successful so I rebooted. Grub didn't work the first time. 
Apparently running that command doesn't change all the lines in 
grub.conf like you would think.

Luckily, as was mentioned in the above posts, grub lets you edit it from 
the boot prompt. I hit "e" on the line, changed the (hd1,1) to (hd0,1) 
and then hit "enter" and "b" to boot. Everything came up as expected. So 
I then edited the file to make those changes permanently. Rebooted again 
for kicks.

Hope this helps someone in the end. My reason for asking was to save the 
time in downloading a CD hoping I could skip a step, but I think this 
was quickest.

Mike
terry wrote:
> On Jan 22, 2008 3:20 PM, Mike LaPlante <mike at dividia.net> wrote:
>   
>> Okay, I have a Fedora 7 system that has /dev/sda as a windows drive, and
>> /dev/sdb as linux. However, I haven't booted the windows drive in over a
>> year so I was wanting to pull that drive out of the system.
>>
>> My concern is that this will piss off grub. I'm thinking before I do
>> that I need to change some lines in grub. I'm just not sure which ones I
>> need to mess with. Also wonder if I need to mess with fdisk and change
>> the boot partition.
>>
>> Here is my current grub.conf
>> ----------------------------------------
>> # grub.conf generated by anaconda
>> #boot=/dev/sda
>> default=0
>> timeout=5
>> splashimage=(hd1,1)/grub/splash.xpm.gz
>> hiddenmenu
>> title Fedora (2.6.23.12-52.fc7)
>>         root (hd1,1)
>>         kernel /vmlinuz-2.6.23.12-52.fc7 ro root=LABEL=/1 noapic
>>         initrd /initrd-2.6.23.12-52.fc7.img
>> title Other
>>         rootnoverify (hd0,0)
>>         chainloader +1
>> ---------------------------------------------
>> And here is the output of fdisk -l
>> ------------------------------------------
>> Disk /dev/sda: 61.4 GB, 61471162368 bytes
>> 255 heads, 63 sectors/track, 7473 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>>    Device Boot      Start         End      Blocks   Id  System
>> /dev/sda1   *           1        3824    30716248+   7  HPFS/NTFS
>>
>> Disk /dev/sdb: 120.0 GB, 120000000000 bytes
>> 255 heads, 63 sectors/track, 14589 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>>    Device Boot      Start         End      Blocks   Id  System
>> /dev/sdb1   *           1        6374    51199123+   7  HPFS/NTFS
>> /dev/sdb2            6375        6387      104422+  83  Linux
>> /dev/sdb3            6388        6648     2096482+  82  Linux swap / Solaris
>> /dev/sdb4            6649       14589    63786082+   5  Extended
>> /dev/sdb5            6649       14589    63786051   83  Linux
>>
>>
>> Note it appears I left an NTFS partition on the second drive. I forgot
>> all about that until just now. >.<
>>
>> So do I need to change the commented out boot=/dev/sda in grub? No idea
>> why its commented out, I've never touched the file. And I think I would
>> need to change the root lines to root (hd0,1) or something like that?
>>
>> Thanks
>> Mike
>>
>>     
>
> [Assuming this is an IDE drive - and that the new machine will boot to
> master on the second IDE port], install grub to it's own MBR and put
> it in the other machine as is, (as master on the second IDE port), so
> that it comes up as  /dev/sdb
>
>