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From: The Natural Philosopher <tnp@invalid.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Move bookworm system from SSD to NVME
Date: Thu, 1 Aug 2024 19:20:51 +0100
Organization: A little, after lunch
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On 01/08/2024 18:50, Jesper wrote:
> On 01.08.2024 18:10, Ahem A Rivet's Shot wrote:
>> dd if=/dev/sda of=/dev/nvme0n1 bs=1m
>>
>>     The add bs=1m will probably work wonders for performance.
> 
> On 01.08.2024 17:47, Jesper wrote:
>  > raspberrypi@raspberrypi:~ $ df -h | grep ^/dev/
>  > /dev/sda2           234G   19G   203G    9% /
>  > /dev/sda1           511M   76M   436M   15% /boot/firmware
>  > For /dev/sda1 it says "firmware", so it probably should/can not be
>  > copied, and is permanent on the raspi5-system
> 
> The Natural philosopher says to clone both sda1 and sda2. I still wonder 
> if sda1 should be cloned. It is listed as "firmware". 

Yes. not only must it be cloned, because it contains instructions as to 
what patition the linux systren is in, but the linux partiton id must be 
cloned as wqell and that does not exost ionside the partibin, but on the 
raw disk
as well so that it has that partition number

That sounds to me
> like it is on a flashmemory directly on the raspi5, and you modify it 
> with raspi-config->Advanced options->Boot order.
> 
> But I can try running both commands:
> dd if=/dev/sda2 of=/dev/nvme0n1 bs=1m
> dd if=/dev/sda1 of=/dev/nvme0n1 bs=1m
> 
The second dd will wipe out the first. Dont waste my time, come back 
when you have demonstrated that it doesn't' work

I've been there and have the T-shirt

That's how I know what you have to do.

/boot in the older release is /boot/firmware in the new.

My Pi4Bookworn SSD that does boot has two partitionb on it


mounted on my desktop they show this

/dev/sdb1                                            510M   61M  450M 
12% /media/leo/bootfs
/dev/sdb2                                            110G  5.7G   99G 
6% /media/leo/rootfs

Bootfs is what gets mounted on /boot/firmware
rootfs is a traditional  Linux filesystem

In bootfs the cmdline.txt specifies

/media/leo/bootfs$ more cmdline.txt
console=serial0,115200 console=tty1 root=PARTUUID=778a9e44-02 
rootfstype=ext4 fsck.repair=yes rootwait noswap=1

So that specifies the PARTUUID of the partition that *must* be mounted 
as root


That PARTUUIDs are shown a s follows


  eo@Juliet:/media/leo/bootfs$ sudo blkid /dev/sdb
/dev/sdb: PTUUID="778a9e44" PTTYPE="dos"
leo@Juliet:/media/leo/bootfs$ sudo blkid /dev/sdb1
/dev/sdb1: LABEL_FATBOOT="bootfs" LABEL="bootfs" UUID="5DF9-E225" 
TYPE="vfat" PARTUUID="778a9e44-01"
leo@Juliet:/media/leo/bootfs$ sudo blkid /dev/sdb2
/dev/sdb2: LABEL="rootfs" UUID="3b614a3f-4a65-4480-876a-8a998e01ac9b" 
TYPE="ext4" PARTUUID="778a9e44-02"


The partition IDs are not stored on the partitions, but in the partition 
table. This is why you have to clone the whole disk, to clone that 
partition table as well.

After booting linux will mount the original  bootfs on /boot/firmware 
(it used to be /boot pirior to bookworm) and the partuuid specified in 
cmdline.txt as the root partition

The bootfs will be re-mounted according to what is in fstab

/etc$ more fstab
proc            /proc           proc    defaults          0       0
PARTUUID=778a9e44-01  /boot/firmware  vfat    defaults          0       2
PARTUUID=778a9e44-02  /               ext4    defaults,noatime  0       1

All these ducks have to be lined up in a row or the bloody thing will 
not boot

> 

-- 
Climate Change: Socialism wearing a lab coat.