$ mount -o discard,defaults /dev/sdb /mnt/disks/data
mount: /dev/sdb: can't read superblock

$ fdisk -l
...
Disk /dev/sdb: 1000 GiB, 1073741824000 bytes, 2097152000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

$ lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sdb      8:16   0 1000G  0 disk
sda      8:0    0   10G  0 disk
└─sda1   8:1    0   10G  0 part /

$ fsck.ext4 -v /dev/sdb
e2fsck 1.42.13 (17-May-2015)
/dev/sdb has unsupported feature(s): metadata_csum
e2fsck: Get a newer version of e2fsck!

$ cat /etc/fstab
LABEL=cloudimg-rootfs   /    ext4   defaults    0 0