Mount error on boot

Hopefully, I can get some help here, because my 1st instinct is to reinstall and I really don’t want to do that.

Dual boot EndeavourOS and Win10 with SSD running C: and /. HDD running D:and /home. Both linux drives are using BTRFS. No issues for a long time. Updated Windows and EndeavorOS this morning. Both were fully updated less than 12 hours ago and working OK. Windows was fine the first time I booted this morning, but EndeavourOS is coming up with:

mount /new_root: cant find UUID=4924bb21-a432-42939bbab-10c2010df83a
You are now being dropped into emergency shell
sh: can’t access tty; job control turned off
[ root fs ]#

Running newest 5.11.2.arch1-1 kernel. Fallback does not work, nor does FTS or FTS fallback.

Can you boot off an installer ISO and share your /etc/fstab and the output of of


To answer your question, it should be fixable unless something is really wrong like a disk failure.


Will post it in a minute.

This isn’t synchronous chat, you can post it whenever you like - no pressure. :wink:

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Here is the lsblk, but how am I going to get my fstab from a boot iso?

[liveuser@eos-2021.02.03 ~]$ lsblk -o NAME,SIZE,TYPE,MOUNTPOINT,UUID,FSTYPE,LABEL
loop0 1.8G loop /run/archiso/sfs/airoot squashfs
sda 931.5G disk
├─sda1 321.4G part 26364E96364E6741 ntfs
├─sda2 1M part
├─sda3 127M part
└─sda4 610G part 2aa8ed9d-1a53-43b6-bf04-ad33096588f4 btrfs
sdb 28.6G disk 2021-02-03-13-32-06-00 iso9660 ENDEAVOUROS
├─sdb1 1.9G part /run/archiso/bootmnt 2021-02-03-13-32-06-00 iso9660 ENDEAVOUROS
└─sdb2 64M part 4C13-BA3B vfat ARCHISO_EFI
sr0 1024M rom

Try this:

sudo mount /dev/sda4 /mnt
cat /mnt/etc/fstab

Also, it looks like this is what your root should be:


It will be interesting to see what is in /etc/fstab

[liveuser@eos-2021.02.03 etc]$ sudo mount /dev/sda4 /mnt
[liveuser@eos-2021.02.03 etc]$ cat /mnt/etc/fstab
cat: /mnt/etc/fstab: No such file or directory

What does ls /mnt show?


I think that is pointing to my home and not / based on the partition size.

You don’t appear to have any other partitions large enough to hold /. Do you have more than 1 disk?

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My / partition is 55G, and clearly that isn’t mounting. Yes, the c: and the / are on my ssd. d: and /home are on hdd.

It’s not even showing up, let alone mounting.

Have you checked cables etc.?

Yeah, Windows is running fine off of c: and accessing d:

Linux can’t see that drive at all.

Have you made any BIOS changes/updates?

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Yes, I took a bios update which took.

Sorry, I didn’t mention the bios.,

Hmm…make sure the controller is still set as AHCI in the BIOS. Maybe the update reset it.


Will do. Will also check fastboot disabled, etc.

SOaB, it switched to raid. That is such a PIA to change without loosing data.


I’m back in business. Used the bcdedit trick to set to safe mode before changing and deletevalue of safeboot, and it took the change and booted to both OS’s. I have done tons of bios updates and never had that change on me despite being on AHCI for years. Thanks so much for the reminder to check that!

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