Using GParted from a LiveUSB (using Ubuntustudio 18.04), I found out that there is a gap of 1813 sectors (disc 1/2 yr in use).

Could this be the cause of the Kernel panic? If yes, how to get the sectors back in the system properly.

On the hard disc:

  • Windows 10 (neither fully installed by me nor used), DELLSUPPORT (unused). i.e. no dual boot here.
  • 9 sdaX - in this order for X= 1,2,3,8,9,4, ua,5,6, ua, 7 --- ua = unallocated spaces, each 1 MiB
  • sector gap between sda3 and sda8
  • --- /dev/sda3 ends with ...29547, Name: Basic data protection, System: nfts, Mount point: /media/ubuntu/OS, Label: OS, Flags: msftdata (data used 34.07 GiB of 221.99)
  • --- /dev/sda8 starts with ...31360 [the missing 1813] N: no entry [ne], S: grub2.core.img, M: ne, L: ne, F: bios.grub (data 1 MiB; used, unused: ne)
  • /dev/sda7 is labelled as image with 13 Gib used out of 13.12 GiB allocated. What could this image be (related to the Kernel panic issue in some way)?

Any helpful recommendations?


(1) Booting attempt stops at: [ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]

(2) Using the recovery menu of the version [4.15.0-20] I end up here Repair process stops here

(3) Using the recovery mode of the other (of two displayed) version [4.15.0-36] I'll end up with Kernel panic s.a.

(4) GParted delivers Gparted (pic a) and GParted (pic b)

I've marked the gap of 'missing' sectors.


From the comments...

The user was trying to do a Software Update, and it failed.

We ran a number of tests, including fsck. No errors found there.

The original system that uses the [4.15.0-20] kernel will still boot. Software Updater won't run.

The failed system that uses the [4.15.0-36] kernel will not boot. It's missing initrd.img-4.15.0-36.

We did various tests, and Ubuntu may need to be reinstalled.

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