Allora,
torniamo ai miei 15 giga spariti.
Riassumo brevemente: il problema e' /dev/hdc2 ed in particolare il fatto che fdisk mirileva 45 giga, mentre df solo 30.
Se wado in winzozz e chiedo info sul disco, a lui risultano i 30 giga di cui sopra ed i 24 usati, piu' o meno come a df.
Quindi?

Ho provato fdisk con opzione p e v. Il risultato mi e' pero' piuttosto oscuro. Ve i posto.

Command (m for help): p

Disk /dev/hdc2: 46.9 GB, 46933447680 bytes
255 heads, 63 sectors/track, 5706 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hdc2p1 ? 103860 114361 84344759+ 6f Unknown
Partition 1 does not end on cylinder boundary.
/dev/hdc2p2 ? 121275 237672 934951344+ 65 Novell Netware 386
Partition 2 does not end on cylinder boundary.
/dev/hdc2p3 ? 101731 112229 84325049 20 Unknown
Partition 3 does not end on cylinder boundary.
/dev/hdc2p4 179626 179629 26206+ 0 Empty
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order

Command (m for help): v
Partition 1 does not end on cylinder boundary.
Partition 2 does not end on cylinder boundary.
Partition 3 does not end on cylinder boundary.
Warning: partition 1 overlaps partition 3.
Total allocated sectors 2072798656 greater than the maximum 91666890

Aiutino, please