installing grub back to MBR

Mon Nov 23 08:48:35 UTC 2015

Hi,

using GParted I can have a full information about all the HDs on the
computer.. :
==================
the first HD is ST3500418AS - this HD is not relevant for the grub problem
because is used ony for datas storage (I know it - the label is :
data_storing)
------------------------------------
the second HD is  WDC WD10EZEX-60Z  ... and have two partitions
          sdb1 (FileSys.: ext4 - mount point : /boot - *the flag is signed
with "boot"*)
          sdb2 (FileSys.: lvm2 pv - mount point : /fedora - the flag is
signed with "lvm")
------------------------------------------------------------------------
the third HD is  WDC WD5000AZRX-0  ... and have three partitions
          sdc1 (FileSys.: nfts - mount point : nothing - the* flag is
signed with "boot"*)
          sdc2 (FileSys.: extended - mount point : nothing - the flag is
signed with "lba")
                  sdc5 (FileSys.: nfts - mount point : nothing - the flag
is not reported)
==================

At this point I think to know that there are two HDs bootable on the
computer (because these have the "partition tables" activated):
      WDC WD5000AZRX-0  ----- partition sdb1
     WDC WD5000AZRX-0 ----- partition sdc1

But .. my acknowledge about Grub is no so very very good, and I would beg
to be helped to understand as grub can work in a such situation.
This in order to concretely be able to solve this problem (that look to be
no so much trivial...).

Thank you
Regards
Angelo

On Mon, Nov 23, 2015 at 6:08 AM, Tim <ignored_mailbox at yahoo.com.au> wrote:

> On Sun, 2015-11-22 at 17:00 -0500, sinthia.vee wrote:
> > If you are on a desktop system drive numbering is determined by which
> > ribbon cable is plugged in.  The boot disk will be at position 0 on
> > the primary cable. It is likely the first drive on your list.
>
> Only if you have cable select, and your BIOS hasn't been previously
> configured to boot from something else.
>
> That's an assumption that can lead you to play with the wrong drive.
>
> > If you are so inclined, you can disconnect the other drives
> > temporarily in order to add them one at a time and see what you have.
>
> If you really can't tell which drive is which, this is the safest
> option.  Afterwards, label your drives so you don't have to go down the
> disassembly route, again.  Write onto the drive where you can see it
> without disassembly (use white texta if the drive is black), enough
> unique numbers from the drive's product code, or serial number, that
> tally with what Linux reads using software.  So next time, you only have
> to lift the lid.  You might want to label the outside of the box, too.
>
> --
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>
> Linux 3.19.8-100.fc20.i686 #1 SMP Tue May 12 17:42:35 UTC 2015 i686
>
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>
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