Disk /dev/sdf: 29.3 GiB, 31488000000 bytes, 61500000 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: 0x2052474d

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sdf1          6579571 1924427647 1917848077 914.5G 70 DiskSecure Multi-Boot
/dev/sdf2       1953251627 3771827541 1818575915 867.2G 43 unknown
/dev/sdf3        225735265  225735274         10     5K 72 unknown
/dev/sdf4       2642411520 2642463409      51890  25.3M  0 Empty

Partition table entries are not in disk order.