Re: boot fails on wheezy (SOLVED)

[Pierre Frenkiel <pierre.frenkiel@gmail.com>]

On Tue, 4 Jun 2013, Goh Lip wrote:

> The allocation of disk numbering (sda, sdb...or (hd0, hd1...) is done by bios 
> and the OS will use whatever the bios determine.
> Also this numbering is not consistent with each reboot.
>
> We should always set "master" and "slave" for jumper wires or use correct 
> primary or secondary cabling (but if you have 1 master and 2 slaves, the 
> slaves will continue to be changeable).
>
> And...use grub2. Grub-legacy 'calls out' partition using (hdx,y) or sdxy 
> whereas grub2 'searches' using UUID.
>
> fstab had changed to UUID from sdxy years ago to overcome problems like this.

  hi Goh,
  I don't understand the relation between my question and your answer:
  the problem was with the BIOS boot sequence, and as far as I know,
  this is totally independant of any OS.
  the boot sequnce, which was since the installation, several years ago:

    1 dvd drive
    2 ST3250410AS

    and I found it has been replaced with:
    1 dvd drive
    2 ST3750640AS

 and the problem disappeared, without any change in grub,
 as soon as I reverted to the original BIOS  boot sequence

 So, my question is still: how can a boot sequence change, without entering
 into BIOS at boot.

best regards,
--
Pierre Frenkiel