emergency mode stuck jetson due to removing SSD

[JCWhite90]

After removing the mounted SSD hard drive (USB) from Jetson Orin Nano, copy some files and folders, and then connecting it again to the same port of Jetson Orin Nano (i did it when it was off), I have been stuck in emergency mode and I am not able to boot the ubuntu, it would be highly appreciated if you can kindly help me

[fshamsfakhr]

Hi! Thanks for the detailed description — this sounds like a common issue related to the system trying to mount a drive listed in /etc/fstab that’s either missing or changed.

Let’s go through a few steps to resolve this. First check logs and available disks

Boot into emergency mode and run:
journalctl -xb
lsblk
This will help confirm if the SSD and your main storage (SD card) are recognized. If you see both your SSD (like /dev/sda1) and SD card (/dev/mmcblk0), it means the system is getting stuck trying to mount something incorrectly — usually due to a bad line in /etc/fstab.

next you can edit fstab to comment out the problematic line:

nano /etc/fstab
UUID=XXXX-XXXX /mnt/myssd ext4 defaults 0 2
Comment it out by adding a # in front of it:

UUID=XXXX-XXXX /mnt/myssd ext4 defaults 0 2

Save and exit (Ctrl+O, Enter, then Ctrl+X).

Then check the filesystem and reboot
Before rebooting, remount the root as read-only and run a quick filesystem check:
mount -o remount,ro /
fsck -y /dev/mmcblk0p1
If everything looks good (e.g., fsck reports the filesystem is clean), just reboot:
reboot

Lets see what it results

[JCWhite90]

Great! That worked, the issue was an incorrect /etc/fstab entry that was preventing a normal boot.
Thannx, you made my day