On ubuntu 21.04
#fdisk -l
Disk /dev/sdc: 298.09 GiB, 320072933376 bytes, 625142448 sectors
Disk model: WDC WD3200AAJS-0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x90909090
Device Boot Start End Sectors Size Id Type
/dev/sdc4 * 0 49999 50000 24.4M a5 FreeBSD
#sudo modprobe ufs
#sudo mount -r -t ufs -o ufstype=ufs2 /dev/sdc4 /mnt/sdc4
#/home/ziomario# cd /mnt/sdc4
#/mnt/sdc4# ls
ls: reading directory '.': Input/output error
PS : the freebsd partition is working great,there aren't problems connected to bad sectors,I have checked and rececked under Freebsd in single user mode. that's odd that ubuntu detects a disk of 24.4M when it is 300GB large
