fsck from grub menu, no longer working

[Udvarias Ur]

Folks,

I've been using the 'Advanced options for Ubuntu' to select the 
'(recovery mode)' of the current kernel in order to run 'fsck,' 'dpkg,' 
and 'clean.'

The last two work fine. However, 'fsck' has been returning this error 
message of late.

             fsck from util-linux 2.27.1
             /dev/sda6 is mounted
             e2fsck: Cannot continue, aborting.

             Finished, please press ENTER


I tried running 'sudo update-grub,' it returned the following output.
udvarias at Merry:~$ sudo update-grub
         [sudo] password for udvarias:
         Generating grub configuration file ...
         Found linux image: /boot/vmlinuz-4.4.0-139-generic
         Found initrd image: /boot/initrd.img-4.4.0-139-generic
         Found linux image: /boot/vmlinuz-4.4.0-138-generic
         Found initrd image: /boot/initrd.img-4.4.0-138-generic
         Found memtest86+ image: /boot/memtest86+.elf
         Found memtest86+ image: /boot/memtest86+.bin
         Found Microsoft Windows XP Professional on /dev/sda1
         done
udvarias at Merry:~$

I then ran 'sudo fsck' from the command-line, it returned
fsck from util-linux 2.27.1
         e2fsck 1.42.13 (17-May-2015)
         /dev/sda6 is mounted.
         e2fsck: Cannot continue, aborting.

I then restarted the system to run 'fsck' in recovery mode and got 
exactly the same output as above.
1. Why is the grub script mounting my root filesystem before running fsck?
2. How can I change it?

-- 
Udvarias Ur

This letter was generated and sent from Thunderbird 52.7.0 on Ubuntu Linux 16.04.5 LTS.

Cette lettre a été générée et envoyée à partir de Thunderbird 52.7.0 sur Ubuntu Linux 16.04.5 LTS.