On Mon, 7 Oct 2019 at 13:43, Jon Ingason <jon.ingason@telia.com> wrote:
Hi,
I accidentally turn off my computer with the power button. That resulted
in corruption of "BIOS start". The motherboard has legacy BIOS.

For most systems, BIOS settings are stored in battery backed memory and 
will not be affected by a power failure until the battery dies.   There are, 
however, some systems that have "power fail" actions that may update 
the BIOS settings so the system responds differently after an intentional
shutdown versus a power failure.

If the battery dies, the BIOS should revert to "default" settings, which might 
mean UEFI boot.   You should enter the BIOS configuration utility (which
usually requires pressing a vendor-specific key when booting) and check the
boot settings.   If the system is several years old or has been without power 
for long periods you should check the battery (generally a small "coin" cell
on the motherboard).
 

$ sudo fdisk -l /dev/sda
[sudo] lösenord för jonsi:
Disk /dev/sda: 2,7 TiB, 3000592982016 byte, 5860533168 sektorer
Disk-modell: WDC WD30EZRX-22D
Enheter: sektorer av 1 * 512 = 512 byte
Sektorstorlek (logisk/fysisk): 512 byte / 4096 byte
I/O-storlek (minsta/optimal): 4096 byte / 4096 byte
Disketikettstyp: gpt
Diskidentifierare: 0A859753-6B39-4C92-BD5C-9754F2056E45

Enhet       Början     Slutet   Sektorer Storlek Typ
/dev/sda1     2048       4095       2048      1M BIOS start
/dev/sda2     4096    1028095    1024000    500M Linux-filsystem
/dev/sda3  1028096 5860532223 5859504128    2,7T Linux LVM

I can start the OS from the hard drive with SystemRescueCD. How can I
repair BIOS start so I can start directly from the hard drive?



 
--
Regards

Jon Ingason
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