Migrate Ubuntu from SSD to NVMe, check out NVMe?

Question

ubuntu

Good day.

1. Tell me how and how can I transfer the configured system from SSD to NVMe?
Ubuntu Server 20.04.2 LTS system
Everything is installed from scratch on NVMe, but it doesn’t work out in any way (I tried both sudo dd and clonezilla and acronyms - to no purpose).
I really don’t want to deploy / configure everything again (Nginx, apache, certbot, etc.).

2. How to check NVMe (samsung 970 evo plus)?. hdparm, as I understand it, does not work with NVMe, and although it gives out something with an error, it does not look like the truth. Shows ~ 2400, but it should be 3+ (on Windows, of course, all the rules).

Please share your experience ... Thanks in advance

ps. if possible, in accessible terms - this is the first experience with Linux (day 4 as I climbed into it)

Answer 1

solution in comments

Answer 2

Everything is installed from scratch on NVMe

great, here is your solution. you install from scratch, and replace the entire OS with copying, booting from the livecd from which the installation takes place.
Since it’s completely unclear what’s going on with you, you didn’t show anything, no errors, no screenshots, nothing ... you can only guess.
With a high probability, the reason is problems with installing grub and the efi boot menu, an attempt to work with NVMe in legacy mode, when, as in your config, booting from it is possible only in UEFI mode, unfortunately, in order to at least configure UEFI, you need to boot in this mode.