Unable to mount root fs

[sonic136]

Hi Fog community

We have just upgraded our fog application from 1.5.9 to 1.15.10.

After the update, we are now unable to boot our client machines to pull an image from the fog server.

We assume that all the settings would have stayed the same as prior to the update.

The error on the client machines is as follows:
Kernel panic - not syncing: UFS: Unable to mount root fs on unknown-block(1,0)
Kernel Offset: disabled
-[ end Kernel panic - not syncing: UFS: Unable to mount root fs on unknown-block(1,0) 1

we have no idea how to fix this.

[sonic136]

Solved. It was the init.xz file that was customised for our environment, The default was applied and seems to be working now.