Best practice moving from sd-card to ssd raspberry

Installation
14

I have Hassbian installation on pi3b+.
First, created a backup on a larger flash drive. Then used Etcher on PC to flash it to the SSD.
To create a backup I followed these: https://pimylifeup.com/backup-raspberry-pi/
https://superuser.com/questions/1097210/clone-only-space-in-use-from-hard-disk
My steps:

  1. Flash Hassbian on a new ssd using Etcher and boot rPI from it.
  2. Mount your SSD and old SD card on rPI. Use an External Hard Drive Enclosure and a USB card reader, these commands are useful:
dmesg      - system log about drives, you need to find your flash drive.
lsusb
sudo lsblk -o UUID,NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL,MODEL
sudo blkid

E.g. sda1 is your SSD.

sudo mkdir /mnt/bak
sudo mount /dev/sda1 /mnt/bak
ls /mnt/PIHDD
  1. Create the backup. Be careful with disks’ and partitions’ names! Yours may be different, and I may have a mistake here.
    E.g. mmcblk0 is your old SD card
sudo mkdir /mnt/bak/ha_backup
cd /mnt/bak/ha_backup
sudo dd if=/dev/mmcblk0 of=backup.img bs=64K conv=noerror,sync status=progress
  1. If you plan to flash on the PC then dismount the backup disk now. If on rPI - then after the flashing.
lsof /mnt/bak           - check that it is not used.
sudo rmdir /mnt/bak
  1. Flash the image from the flash drive to SSD using Etcher on a PC. You can also restore the backup right on the rPI (do step 4 later then):
sudo dd if=/mnt/bak/ha_backup/backup.img of=/dev/mmcblk1 bs=64K
  1. Plug SSD to rPI and check its health. You may need to reset the readonly bit if SD card was not functional. Options depend on the file system.
sudo fsck -v -p /dev/sda1
  1. Turn off rPI. Remove new SD card and unplug USB card reader from rPI. Only plug the SSD and boot from it.
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