Creating config file /etc/default/grub with new version
grub-probe: error: cannot find a device for / (is /dev mounted?).
Installation finished. No error reported.
/usr/sbin/grub-setup: warn: Attempting to install GRUB to a partition instead of the MBR.  This is a BAD idea..
/usr/sbin/grub-setup: warn: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
Installation finished. No error reported.
/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?).
dpkg: error processing grub-pc (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of grub:
 grub depends on grub-pc; however:
  Package grub-pc is not configured yet.
dpkg: error processing grub (--configure):
 dependency problems - leaving unconfigured
Setting up dmsetup (2:1.02.48-5) ...
configured to not write apport reports
configured to not write apport reports
I: update-initramfs is disabled (live system is running on read-only media).
Errors were encountered while processing:
 grub-pc
 grub
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@debian:/# nano /etc/crypttab
root@debian:/# update-initramfs -u
I: update-initramfs is disabled (live system is running on read-only media).
root@debian:/# update-initramfs -u
I: update-initramfs is disabled (live system is running on read-only media).