Booting from offset

[Diddier Hilarion]

Hi, the problem is the following.

I have a hard disk with the first sector physically damaged (read or write is not possible so there is not partition table), I would like to know if it's possible to specify the root as the block device + an offset in which is the partition. Something like this:

menuentry myos{
    ...

    set root=(hd0)+102400
    ...

}

Where 102400 is the offset in any unit (sectors or bytes).

I've seen this behavior to specify files in a filesystem but the documentation talks nothing about specify a partition in this way.

ofcourse grub will be installed in a second block device.

Thanks in advance.

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 Diddier A Hilarion B.