[SOLVED] Slackware 15 - NVME clone to external NVME - Boot problem from external NVME

colorpurple21859 · 10-13-2022, 12:14 PM

Efi firmware/bios uses partuuid to identify the efi partition and you have two efi partitions with the same part-uuid:
{EFI Hard Drive 1}/sdb2
and
{EFI USB Device (SSK)}/nvme1n1p2
Both have the same partuuid fb4091c7-a0e2-4f16-9391-38bb4e4d62d9

would suggest gdisk to change the partuuid of /dev/nvme1n1p2 on the external drive, and delete the current firmware/bios entry for the external drive with efibootmgr, then boot into the external drive and and run

Code:

grub-install --removable

This will prevent grub-install from creating nvram entry in the firmware/bios and allow for booting on other systems by using the firmware boot order.
To allow booting on systems That only support legacy mode, also run

Code:

grub-install --target=i386-pc --force /dev/nvme1n1

Klaus150 · 10-14-2022, 09:24 AM

My Laptop:

Code:

Two internal NVMe-sticks: 
-NVMe1 runs under Slackware 15
-NVMe0 runs under ArcoLinux
One internal SSD:
-runs under Windows 10

Some information about my Bios:

Code:

1. It is an "INSYDE" H2-Bios
2. Each Operating System could start over his own EFI (if all activated in Bios)
3. I use the Boot Manager from Arcolinux to boot the 3 operation systems

Thanks.
My problem is still how can I give to the External EFI-partition a new UUID, without to delete it? Is there any posibility?

kjhambrick · 10-14-2022, 10:00 AM

Klaus150 --

If you've got ext2, ext3 or ext4 partitions then maybe create a new UUID via uuidgen, then tune2fs will work ?

Or you could use tune2fs -U random /dev/xxx or tune2fs -U time /dev/xxx ...

Code:

# man tune2fs

<<snip>>

       -U UUID
              Set the universally unique identifier (UUID) of the file system to UUID.  The  for-
              mat  of  the  UUID  is  a  series  of  hex  digits separated by hyphens, like this:
              "c1b9d5a2-f162-11cf-9ece-0020afc76f16".  The UUID parameter may also be one of  the
              following:

                   clear  clear the file system UUID

                   random generate a new randomly-generated UUID

                   time   generate a new time-based UUID

              The  UUID may be used by mount(8), fsck(8), and /etc/fstab(5) (and possibly others)
              by specifying UUID=uuid instead of a block special device name like /dev/hda1.

              See uuidgen(8) for more information.  If the system does not  have  a  good  random
              number  generator  such  as /dev/random or /dev/urandom, tune2fs will automatically
              use a time-based UUID instead of a randomly-generated UUID.
<<snip>>

I know that tune2fs works on my ext4 Partitions.

There are also btrfstune and reiserfstune.

Both have similar UUID parameters ( check the man pages ).

HTH

-- kjh

p.s. I've got an Insyde Bios on my Laptop too

Klaus150 · 10-14-2022, 10:06 AM

kjhambrick--

the EFI-Partition is a VFAT-Partition.
For the Root-partition (ext4) I changed the UUID with tune2fs and the SWAp-partition could be deleted without problems, so I can get a new UUID.
My problm is still the EFI-partition.

Regards,
Klaus150

kjhambrick · 10-14-2022, 10:42 AM

Sorry Klaus150, I missed that.

There is a tune.exfat but on Slackware 15.0 but no mention of UUID

This https://askubuntu.com/questions/1250...hange-partuuid Ubuntu Links shows how to use gdisk but I've no experience here ( my Laptop came with a Windows 11 labeled Partition )

According to the info on the link and in the gdisk man page, Expert's Option 'c' can change the GUID on a GPT-Partitioned Disk.

No Experience here so I'll butt out now

-- kjh

Klaus150 · 10-14-2022, 02:49 PM

kjhambrick--

Thanks. That's true: I can change only the GUID (I've done it), but not the UUID.
Regards,
Klaus150

Klaus150 · 10-14-2022, 03:30 PM

A small progress:

Code:

With GParted I could change the UUIDs of the EFI and the SWAP-partitions. 
I also changed the FSTAB accordingly.

By the BOOT-Screen I can choose the EFI of the external USB...but is still the internal NVMe booting.
Question: should I update the EFI / Grub of the external USB over CHROOT, with the laptop started with the Slackware15-Boot-ISO?

colorpurple21859 · 10-14-2022, 04:10 PM

At the grub menu press e for edit, at the line that starts with linux change root=UUID=xxxxxx to root=/dev/nvme1n1p3 ctrl-x to boot, once booted into the external drive check that correct efi partition is mounted to /boot/efi, rerun grub-mkconfig

colorpurple21859 · 10-14-2022, 07:47 PM

One way of changing uuid of efi partition is to copy/move everything off it, reformat and copy/move everything back on.

stylste · 10-15-2022, 02:07 AM

After the change of the UUIDs you should also change the initrd in the external nvme enabling usb-storage

stylste · 10-15-2022, 04:04 AM

Also you should change the UUIDs in elilo.conf or grug.cfg in external nvme

Klaus150 · 10-15-2022, 05:54 AM

stylste--"After the change of the UUIDs you should also change the initrd in the external nvme enabling usb-storage"

OK.
I have changed all the UUIDs of the 3 partitions of the external USB-NVMe. Also I have adapted the FSTAB and GRUB.CFG with the new UUIDs.
When I boot from the external USB-NVMe, it stucks ...no TTY (no /mnt found. Something like https://www.linuxquestions.org/quest...ab-4175672092/).

Should I boot with the ISO from Slackware15, mounting the external USB-NVMe and proceed with INITRD with USB-storage over CHROOT?

stylste · 10-15-2022, 07:40 AM

Yes this the next step .

stylste · 10-15-2022, 07:46 AM

#mkinitrd -c -k (kernel e.g. 5.15.19 (write without the word kernel)) -m usb-storage:ehci-pci:ehci-platform (optional uas:ehci-hcd:uhci-hcd:ext4)-u -w 10 -f ext4 /dev/nvme that has the grub entry#
should do

Edit
Excuse me but i dont know how to make the text as code looking

keefaz · 10-15-2022, 08:55 AM

As suggested already you can use customs labels instead of uuid to identify partitions

Example:

Code:

fatlabel /dev/nvme1n1p2 SLACK-EFI
e2label /dev/nvme1n1p3 SLACK-ROOT
swapoff /dev/nvme1n1p4
mkswap -L SLACK-SWAP /dev/nvme1n1p4
swapon -a

/etc/fstab becomes

Code:

LABEL=SLACK-EFI     /boot/efi    vfat        defaults    1   0
LABEL=SLACK-SWAP    swap         swap        defaults    0   0
LABEL=SLACK-ROOT    /            ext4        defaults    1   1
...

Using elilo bootloader, /boot/efi/EFI/Slackware/elilo.conf should be like

Code:

chooser=simple
delay=1
timeout=1
read-only
root="LABEL=SLACK-ROOT"
#
image=vmlinuz...

I don't know how to configure grub to use partitions label instead of uuids (I don't use grub)