/dev/ad4: 310101 cyl 16 hd 63 sec
Part        Start        Size Type Flags
   1:          63    31953222 0x07 0x80
   2:    31953285   280623420 0x0f 0x00


/dev/ad4s1: 31699 cyl 16 hd 63 sec
Part        Start        Size Type Flags
   1:   543908729   543450478 0x0d 0x72
   2:  1818575915  1922328096 0x2b 0x43
   3:   167774733           0 0x74 0x20
   4:  2625830912       49835 0x00 0x00

/dev/ad4s2: 278396 cyl 16 hd 63 sec
Part        Start        Size Type Flags
   1:          63    18458622 0x83 0x00
   2:    18458685   262164735 0x05 0x00
/dev/ad4s6: 260084 cyl 16 hd 63 sec

Part        Start        Size Type Flags
   1:   543908729   543450478 0x0d 0x72
   2:  1818575915  1922328096 0x2b 0x43
   3:   167774733           0 0x74 0x20
   4:  2625830912       49835 0x00 0x00


Basically there should be several partitions
1. 15GB
2. 8GB designated for BSD
3. 128GB