install boot sector

[mickey]

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