Ubuntu
Advanced system options for ubuntu
Windows boot manager (on /dev/sda1)
System setup

[   3.075355] sd 4:0:0:0 [sdb] No Caching Mode page found

[   3.075388] sd 4:0:0:0 [sbd] Assuming Drive cache: write through

/dev/sdb2 contains a file system with errors, check forced

  Inode 2766781 extend tree (at level 2) could be narrower. IGNORED.

Inode 3938804, end of extent exceeds allowed value

 (Logical Block 387, physical block 19229549, Len 1)

/dev/sbd2: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.

(i.e., without -a or -p options)

fsck exited with status code 4

The root filesystem on dev/svb2 requires a manual fsck
BusyBox v1.27.2 (Ubuntu 1:1.27.2-2ubuntu3.2) built-in shell (ash)

Enter ‘help’ for a list of built in commands.
(initramfs)

e2fsck -C0 -p on /dev/sdb2