$ sudo fdisk -l /dev/sdb

Disk /dev/sdb: 14.6 GiB, 15619588096 bytes, 30507008 sectors
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: 0x6f20736b

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sdb1  ?     778135908 1919645538 1141509631 544.3G 72 unknown
/dev/sdb2  ?     168689522 2104717761 1936028240 923.2G 65 Novell Netware 386
/dev/sdb3  ?    1869881465 3805909656 1936028192 923.2G 79 unknown
/dev/sdb4  ?    2885681152 2885736650      55499  27.1M  d unknown