install boot sector

[JD]

On 09/28/2011 08:01 AM, mickey wrote:
> On 09/27/2011 10:55 PM, JD wrote:
>> On 09/27/2011 07:18 PM, mickey wrote:
>>> On 09/27/2011 09:57 PM, JD wrote:
>>>> On 09/27/2011 06:45 PM, mickey wrote:
>>>>> On 09/27/2011 09:00 PM, JD wrote:
>>>>>> On 09/27/2011 05:19 PM, mickey wrote:
>>>>>>> F15
>>>>>>>
>>>>>>> Setup F15 hard drive on a different computer /dev/sda and sent hard
>>>>>>> drive to a friend to put in his computer as /dev/sdb , behind WindowsXp
>>>>>>> and went into the rescue mode to run grub-install /dev/sda , getting a
>>>>>>> error message;
>>>>>>>
>>>>>>> "sdc2 Does not have any corresponding BIOS drive".
>>>>>>>
>>>>>>> There is only two hard drives and a DVDrom in this computer,  I can't
>>>>>>> understand the sdc2 unless fedora see's this
>>>>>>> drive , slave hard drive as sdc2 instead of sdb2 , partition 2 is where
>>>>>>> the / partition is for Fedora.
>>>>>>> WindowsXP is on Master drive.
>>>>>>>
>>>>>>>
>>>>>>> Hard Drive is recognized by BIOS as a Slave sdb.
>>>>>>>
>>>>>>> I guess the Device map is different and causing problems, How do I fix
>>>>>>> this to get boot sector on /dev/sda
>>>>>>>
>>>>>>> Can the command  grub-install --recheck /dev/sda fix the problem.
>>>>>> I thought you have to edit grub.conf so that
>>>>>> boot=/dev/sda<<<<       Point this to correct drive like /dev/sdb
>>>>>>
>>>>>> splashimage=(hd0,1)/boot/grub/splash.xpm.gz<<<       Change this to correct
>>>>>> (hd1,0) as an example
>>>>>> hiddenmenu
>>>>>> default=0
>>>>>>
>>>>>> title Fedora (2.6.39.3-1.fc14.i686)
>>>>>>                root (hd0,1)<<<<       Change this to (hd1,0)
>>>>>>                kernel /boot/vmlinuz-2.6.39.3-1.fc14.i686 ro root=/dev/sdb
>>>>>> rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8
>>>>>> SYSFONT=latarcyrheb-sun16 KEYTABLE=us LANG=en_US.UTF-8 nomodeset
>>>>>>                initrd /boot/initramfs-2.6.39.3-1.fc14.i686.img
>>>>>>
>>>>>>
>>>>>> Then you must fix /etc/fstab so that
>>>>>> /dev/sdb1 /     ext3    defaults        0 0
>>>>>>
>>>>>> ...etc.
>>>>>>
>>>>> Are you sure the (hd1,0) instead it should be (hd1,1) because linux / is
>>>>> at sdb2 .
>>>> Well, the default correspondence between bios disks and linux disks
>>>> is
>>>> hd0  sda
>>>> hd1  sdb
>>>>
>>>> I assume your linux is installed on first partition of the disk.
>>>> Since the linux disk is the second disk in the machine, per your
>>>> message, then the disk is hd1 (i.e. /dev/sdb)
>>>> and since linux is on the  first partition, the boot
>>>> disk would be
>>>> (hd1,0)  which maps onto (/dev/sdb1)
>>>>
>>>> Take a look at the file /boot/grub/device.map
>>>>
>>>> which shows the most basic device mapping, like
>>>> (fd0)   /dev/fd0
>>>> (hd0)   /dev/sda
>>>>
>>>> Good luck
>>>>
>>> I guess i got this pretty confusing.
>>> sdb1 is a ntfs file system for a backup to windowsXP.
>>> And sdb is / root for linux
>> sdb is the WHOLE disk.
>> sdb1 is partition one on sdb
>> Therefore it is not possible to have
>> sdb as the linux root file system, and
>> sdb1 as the ntfs backup of windows.
>>
>> I suspect that sdb1 is your ntfs backup
>> and sdb2 is your linux root file system.
>>
>>
> JD thanks for your help.
>
> But I have decided that I'am going to walk my friend through a complete new
> install, that way he will learn how to do it in the future.
>
> That way also Linux can do the proper detection settings on his computer.
That is a wise decision.
Good luck.