install boot sector

[mickey]

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.