USB memory stick for Ubuntu install

[Bob]

** Reply to message from Ralf Mardorf via ubuntu-users
<ubuntu-users at lists.ubuntu.com> on Fri, 6 Aug 2021 08:44:36 +0200

> On Thu, 5 Aug 2021 22:21:02 -0700, Bob wrote:
> >I just had a memory problem on my desktop computer.  I have a DVD with
> >the Ubuntu install on it.  What I want to do is add the BADRAM
> >parameter to grub, I dont see a way to do it on a DVD.  So a USB
> >memory stick should allow me to do that.
> >
> >My question is after I load the Ubuntu install on the USB memory stick
> >can I edit /etc/default/grub and then do an update-grub to replace the
> >boot grub on the USB stick?
> 
> Hi,
> 
> an USB stick with a persistent live Ubuntu comes with a few pitfalls.
> I'm using a persistent live Xubuntu for backups. I don't know everything
> that is possible or impossible.
> 
> One of the keywords is "casper",
> https://manpages.ubuntu.com/manpages/bionic/en/man7/casper.7.html .
> 
> I'm in favour of Ventoy, https://www.ventoy.net/en/index.html . It does
> use grub to chose the ISO. However, the ISO has got it's own
> bootloader, too. It should be possible to add kernel parameters to the
> ISO's bootloader, probably as described by
> https://help.ubuntu.com/community/BootOptions#Changing_the_CD.27s_Default_Boot_Options
> . Actually I don't know anything about grub parameters such as BADRAM,
> you might need to use a kernel parameter, maybe memmap, see
> https://unix.stackexchange.com/questions/75059/how-to-blacklist-a-correct-bad-ram-sector-according-to-memtest86-error-indicati
> .
> 
> I seriously doubt that update-grub does help you. When using a
> persistent live Ubuntu flavour you can install packages, configure the
> install by configs in /home and /root, store data etc., but anything
> boot related is tricky, perhaps impossible to do. IOW e.g. booting
> another kernel or e.g. changing the actually used grub configurations
> might be impossible to do.
> 

Thanks for the URLs.

I have used the live DVD to look at the partition.  From what I can see the
system looks like it may be OK. I edited the file /etc/default/grub and added
the BADRAM parameter. I finally got to the grub menu and got to the command
prompt then ran update-grub.  On rebooting the system still hangs at the same
place it did before.  The boot stops with a message at the top of the screen
that says '/dev/sda9: clean, 236704/4890624 files, 4396335/19531264 blocks'.

Any suggestions on how to continue troubling shooting this?

-- 
Robert Blair


I don't make jokes.  I just watch the government and report the facts.  -- Will Rogers