formatiranje USB ključa na linuxu

Ali je že kdo formatiral USB ključ na linuxu ?

Moj ključ (128mb) ima namreč štiri particije in ne vem, kaj se bo zgodilo, če jih pobrišem in naredim eno (vfat) particijo.

rezultat ukaza:
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fdisk -l /dev/sdb

Disk /dev/sdb: 131 MB, 131072000 bytes
5 heads, 50 sectors/track, 1024 cylinders
Units = cylinders of 250 * 512 = 128000 bytes

Naprava Boot Start End Blocks Id System
/dev/sdb1 ? 7479086 8153844 84344761 69 Neznano
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(68, 13, 10) logical=(7479085, 2, 16)
Partition 1 has different physical/logical endings:
phys=(288, 115, 43) logical=(8153843, 2, 37)
Partition 1 does not end on cylinder boundary.
/dev/sdb2 ? 6806078 14285604 934940732+ 73 Neznano
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(371, 114, 37) logical=(6806077, 4, 32)
Partition 2 has different physical/logical endings:
phys=(366, 32, 33) logical=(14285603, 3, 46)
Partition 2 does not end on cylinder boundary.
/dev/sdb3 ? 11 11 0 74 Neznano
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(371, 114, 37) logical=(10, 1, 24)
Partition 3 has different physical/logical endings:
phys=(372, 97, 50) logical=(10, 1, 23)
Partition 3 does not end on cylinder boundary.
/dev/sdb4 1 13740454 1717556736 0 Prazno
Partition 4 has different physical/logical beginnings (non-Linux?):
phys=(0, 0, 0) logical=(0, 0, 1)
Partition 4 has different physical/logical endings:
phys=(0, 0, 0) logical=(13740453, 4, 22)
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order
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USB ključ mountam tako: mount /dev/sdb /mnt/usbkey
Če poskušam mountati /dev/sdb1 /dev/sdb2 ... mi ne uspe.

Čemu so sploh namenjene štiri particije na usb ključu?