Determining why I'm getting dropped to the emergency shell?

[Adam Mercer]

Hi

I did an update this morning on my FC32 system and as there was a
kernel update I rebooted the system, it didn't come back up properly
and instead dropped me into the emergency shell.

I've had a quick look around and can't see anything obvious to explain
why it is doing this?

Any ideas on how to troubleshoot why it's dropping me into the
emergency shell so I can try to fix what's going on?

Cheers

Adam

[Ian Pilcher]

On 9/15/20 4:02 PM, Adam Mercer wrote:
> I did an update this morning on my FC32 system and as there was a
> kernel update I rebooted the system, it didn't come back up properly
> and instead dropped me into the emergency shell.
>
> I've had a quick look around and can't see anything obvious to explain
> why it is doing this?
>
> Any ideas on how to troubleshoot why it's dropping me into the
> emergency shell so I can try to fix what's going on?

Do you use Intel RAID?

https://bugzilla.redhat.com/show_bug.cgi?id=1878970

[Samuel Sieb]

On 9/15/20 2:02 PM, Adam Mercer wrote:
> I did an update this morning on my FC32 system and as there was a
> kernel update I rebooted the system, it didn't come back up properly
> and instead dropped me into the emergency shell.
>
> I've had a quick look around and can't see anything obvious to explain
> why it is doing this?
>
> Any ideas on how to troubleshoot why it's dropping me into the
> emergency shell so I can try to fix what's going on?

Did you try booting the previous kernel to see if it's specific to the 
new kernel or new initramfs?

[Adam Mercer]

On Tue, Sep 15, 2020 at 2:54 PM Ian Pilcher  wrote:
> > Any ideas on how to troubleshoot why it's dropping me into the
> > emergency shell so I can try to fix what's going on?
>
> Do you use Intel RAID?

No I use BTRFS on a NVMe SSD.

Cheers

Adam

[Adam Mercer]

On Tue, Sep 15, 2020 at 3:18 PM Samuel Sieb  wrote:
> Did you try booting the previous kernel to see if it's specific to the
> new kernel or new initramfs?

I tried all previous kernels and the rescue image, all resulting in
the same behaviour.

Cheers

Adam

[Adam Mercer]

I found the problem, there was a typo in my /etc/fstab, my fat fingers
has caused some extraneous characters to be added to the end one of my
drives UUID so it was failing to mount.

Thanks for all the help!

Cheers

Adam

On Tue, Sep 15, 2020 at 2:02 PM Adam Mercer  wrote:
> Hi
>
> I did an update this morning on my FC32 system and as there was a
> kernel update I rebooted the system, it didn't come back up properly
> and instead dropped me into the emergency shell.
>
> I've had a quick look around and can't see anything obvious to explain
> why it is doing this?
>
> Any ideas on how to troubleshoot why it's dropping me into the
> emergency shell so I can try to fix what's going on?
>
> Cheers
>
> Adam

[Roger Heflin]

mount -a and see what fails is usually a good idea.

A good plan is to add the entry to fstab, umount the what currently
mounted for it, and then do a test "mount /directory/location/only" so
it will use the fstab data and  see if it can mount with what is in
fstab.

Doing it that way has saved me from emergency mode a number of times.

On Tue, Sep 15, 2020 at 5:44 PM Adam Mercer  wrote:
> I found the problem, there was a typo in my /etc/fstab, my fat fingers
> has caused some extraneous characters to be added to the end one of my
> drives UUID so it was failing to mount.
>
> Thanks for all the help!
>
> Cheers
>
> Adam
>
> On Tue, Sep 15, 2020 at 2:02 PM Adam Mercer  wrote:
> > Hi
> >
> > I did an update this morning on my FC32 system and as there was a
> > kernel update I rebooted the system, it didn't come back up properly
> > and instead dropped me into the emergency shell.
> >
> > I've had a quick look around and can't see anything obvious to explain
> > why it is doing this?
> >
> > Any ideas on how to troubleshoot why it's dropping me into the
> > emergency shell so I can try to fix what's going on?
> >
> > Cheers
> >
> > Adam
>
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[George N. White III]

On Tue, 15 Sep 2020 at 19:44, Adam Mercer  wrote:
> I found the problem, there was a typo in my /etc/fstab, my fat fingers
> has caused some extraneous characters to be added to the end one of my
> drives UUID so it was failing to mount.

Roger has some good advice.  Another useful practice is to preserve your
original
fstab and check your changes with diff.   In the bad old days keyboards
were larger
but when working over phone lines using a modem it was all to common to
find random
garbage added to files and command lines.

[Adam Mercer]

On Tue, Sep 15, 2020 at 4:04 PM Roger Heflin  wrote:
> mount -a and see what fails is usually a good idea.
>
> A good plan is to add the entry to fstab, umount the what currently
> mounted for it, and then do a test "mount /directory/location/only" so
> it will use the fstab data and  see if it can mount with what is in
> fstab.

Thanks, that's some good advice.

Cheers

Adam

[Adam Mercer]

On Tue, Sep 15, 2020 at 5:08 PM George N. White III  wrote:
> Roger has some good advice.  Another useful practice is to preserve your original
> fstab and check your changes with diff.   In the bad old days keyboards were larger
> but when working over phone lines using a modem it was all to common to find random
> garbage added to files and command lines.

Thanks, I'll remember that approach! It'll save me many headaches in
the future as I imagine this will happen again...

Cheers

Adam