luc@luc330:~$ sudo fdisk -l /dev/sdb
Disk /dev/sdb: 7.28 TiB, 8001563221504 bytes, 15628053167 sectors
Disk model: Expansion HDD
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 01000000-0000-0000-4E54-31374D5A4744
Device Start End Sectors Size Type
/dev/sdb1 40 409639 409600 200M EFI System
/dev/sdb2 411648 15628052479 15627640832 7.3T Linux filesystem
luc@luc330:~$ sudo btrfsck /dev/sdb2
Opening filesystem to check...
Checking filesystem on /dev/sdb2
UUID: f244899d-a9c4-4fec-a7f6-f0762b21b7eb
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space tree
[4/7] checking fs roots
[5/7] checking only csums items (without verifying data)
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
found 2427800559616 bytes used, no error found
total csum bytes: 2368075928
total tree bytes: 2890809344
total fs tree bytes: 394608640
total extent tree bytes: 62603264
btree space waste bytes: 120864360
file data blocks allocated: 2424909750272
referenced 2424909750272
...
fsck looks fine, so uncomment btrfs entry in fstab
...
luc@luc330:~$ sudo mount /dev/sdb2
mount: (hint) your fstab has been modified, but systemd still uses
the old version; use 'systemctl daemon-reload' to reload.
luc@luc330:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 1.2G 1.5M 1.2G 1% /run
efivarfs 148K 93K 51K 65% /sys/firmware/efi/efivars
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 9.0G 84G 10% /
tmpfs 5.7G 0 5.7G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/mapper/vgHome-lvHome 3.0T 640K 2.9T 1% /home
/dev/sda2 2.0G 198M 1.6G 11% /boot
/dev/sda1 1.1G 6.2M 1.1G 1% /boot/efi
tmpfs 1.2G 12K 1.2G 1% /run/user/1000
/dev/sdb2 7.3T 2.3T 5.1T 31% /var/backups/rsync
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