0

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

Marietto
  • 635
  • Look at the starting sector: it's 0; this means that the MBR is fake, and the BSD disklabel occupies the entire disk. Let me check what can be done to mount such media in Linux. – dumetrulo Jul 14 '21 at 16:36
  • Since the MBR on the disk is only protective, try backing it up (dd if=/dev/sdc of=/path/to/sdc.mbr bs=512 count=1), zeroing it out (dd if=/dev/zero of=/dev/sdc bs=512 count=1), and mounting again. You can later cooy the MBR back by swapping if and of parameters of the dd command. If this is not an option for you, or it fails, try guestfish (https://libguestfs.org/guestfish.1.html). – dumetrulo Jul 14 '21 at 16:54
  • Could you edit your post and provide the output of fdisk -l -t bsd /dev/sdc? – dumetrulo Jul 15 '21 at 08:02

0 Answers0