I am trying to mount a BTRFS partition in Linux Mint KDE.
This is my fdisk -l for the relevant device
Device Boot Start End Sectors Size Id Type
/dev/sdb1 32 4096031 4096000 2G 83 Linux
/dev/sdb2 4096032 4608031 512000 250M 82 Linux swap / Solaris
/dev/sdb3 4608032 1953092263 1948484232 929.1G 5 Extended
/dev/sdb5 4608040 1953092263 1948484224 929.1G 8e Linux LVM
I have tried sudo mount -t btrfs /dev/sdb5 /mnt/serverdisk
and I got mount: /dev/sdb5 is already mounted or /mnt/serverdisk busy
and I tried sudo mount -t btrfs /dev/sdb3 /mnt/serverdisk
and I got this
mount: wrong fs type, bad option, bad superblock on /dev/sdb3,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
As far as I can tell /dev/sdb5 is not busy.
How can I mount this partition.
Note: In Dolphin it appears that the whole disk is incorrectly mounted as "C" when I click on it I get
An error occurred while accessing 'Home', the system responded: The requested operation has failed: Error mounting system-managed device /dev/dm-0: Command-line `mount "/mnt/c"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/c-c,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
The 2GB first Partition is also detected and displayed under devices but when I click on it I get the same error.
Mint is running in a VM. This is a drive that I have loaded in a SATA-USB dock and I am giving the guest access to the entire physical disk.
Edit:
I have now tried the solution here How to mount an LVM volume?. I have followed the steps successfully until the mount.
With the LV being c and the VG being c
I have tried
sudo mount /dev/c/c /mnt/serverdisk -o ro,user
and I have tried
sudo mount -t btrfs /dev/c/c /mnt/serverdisk -o ro,user
The result I get for both commands is
mount: wrong fs type, bad option, bad superblock on /dev/sdb3,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
for the first command with no file system specified I got this in after doing dmesg
[ 1114.590972] EXT4-fs (dm-0): mounting ext3 file system using the ext4 subsystem
[ 1114.590975] EXT4-fs (dm-0): bad block size 16384
for the second command there was nothing in the log.
Edit2:
After doing some reading it appears the 16384 byte block size of the volume maybe be the problem. Is there any way I can shrink the block size on the drive with out losing data?
