boot problem

[Bob]

** Reply to message from Ralf Mardorf via ubuntu-users
<ubuntu-users at lists.ubuntu.com> on Thu, 12 Aug 2021 08:45:53 +0200

> On Wed, 11 Aug 2021 19:58:56 -0700, Bob wrote:
> >I have replaced an old computer (BIOS not UEFI) with a new one, Lenovo
> >5 Desktop 90NA001DUS.  Moved the hard disk from the old computer to
> >the new computer.  Booting a USB live CD it shows the disk drive is
> >SDA which it was in the old computer.  I moved the disk drive to boot
> >before the SSD which contains win10.  I have disabled security boot in
> >the new computer.  The system still boots win10.
> >
> >Any ideas on how to get this disk drive to boot?
> 
> Hi,
> 
> sda is a kernel name descriptor for a block device. Those can change
> with each boot. It's better to use persistent naming, such as by-label.

In this case fstab is using UUID


> While in my experiences even sda, sdb etc. are persistent, you can not
> use an USB stick with a live ISO to check, if the drive is or isn't
> sda.
> 
> However, you might need to reinstall the bootloader and/or edit BIOS
> settings.
> 
> You mention "security boot", does this mean there's an option named
> "security boot" or "secure boot" that can be enabled or disabled, or

secure boot - enable/disable


> are there several options such as "CSM support", "Boot mode selection"
> and "Storage Boot Option Control"? My mobo has got no "secure boot"
> option, but a "CSM support" option and those other mentioned options to
> select between different "UEFI" and "Legacy" settings/combinations.
> 
> Just in case, after changing the boot order you did not forget to save
> the settings?

saved


> Regards,
> Ralf

-- 
Robert Blair


Beer is proof that God loves us and wants us to be happy.  -- Benjamin Franklin