That is not a label.
- sdb means → Serial Disk B
- sdb1 means → Serial Disk B Partition 1
So clearly: /dev/sdb is the whole disk. /dev/sdb1 is the first Partition of the second Disk.
The disk must be mounted into a folder.
Example:
mount /dev/sdb1 /mnt
Please read the link for more explanations: