specified switch root path sysroot does not seem to be an OS tree

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Hi There!

I'm a newbie Linux user, I've searched about this on Google before ask, the case is I don't make any idea what I should I search exactly on Google, because I never had any problem like this with Linux before... In advance, there are some files very important to my work, so I did not want to format it. My laptop has dual boot with Fedora 26 and Windows 10.

The case is, today I was installing and configuring KDump on my Fedora 26, and during the final step, I configured the crashkernel as 128M, and the system advised me to reboot, and I did it. But the system isn't load anymore, simply goes to emergency mode, as follow:

Generating "/run/initramfs/rdsosreport.txt"

Entering emergency mode. Exit the shell to continue. Type "journalctl" to view system logs. You might want to save "/run/initramfs/rdsosreport.txt" to a USB stick or /boot after mounting then and attach it to a bug report.

Well, I did it, and analizing the results , I found these lines with this:

"initrd-switch-root.service: Main Process exited, code=exited, status=1/FAILURE Failed to start Switch Root"

Before, I used this command to get more details:

systemctl status initrd-switch-root.service

Analizing the response, I found this lines:

Failed to switch root: Specified switch root path '/sysroot' does not seem to be an OS tree. os-release file is missing initrd-switch-root.service: Main Process exited, code=exited, status=1/FAILURE Failed to start Switch Root. initrd-switch-root.service: Unit entered failed state. initrd-switch-root.service: Triggering OnFailure= dependencies. initrd-switch-root.service: Failed with result 'exit-code'."

During my searches on Web, I found some people with this problems, but some responses indicating (maybe) a dracut problem, so I tryied to run this command:

dmesg|grep dracut

This return to me 5 lines with a lot of informations, but refer about:

dracut-cmdline dracut-pre-udev dracut-pre-pivot dracut-pre-pivot dracut-initqueue

All of these with "res=success" in the end of line

Someone could help me please? What problem could it be? I do not know where to start. Thanks in advance