Disk /dev/sdb1: 518 MB, 518242304 bytes
16 heads, 62 sectors/track, 1020 cylinders
Units = cylinders of 992 * 512 = 507904 bytes

This doesn't look like a partition table
Probably you selected the wrong device.

     Device Boot      Start         End      Blocks   Id  System
/dev/sdb1p1   ?     1765601     1756246  2142843574   72  Unknown
Partition 1 has different physical/logical beginnings (non-Linux?):
     phys=(372, 101, 46) logical=(1765600, 10, 7)
Partition 1 has different physical/logical endings:
     phys=(357, 132, 39) logical=(1756245, 10, 18)
Partition 1 does not end on cylinder boundary.
/dev/sdb1p2   ?     1845609     3505180   823147060+  75  PC/IX
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(357, 10, 14) logical=(1845608, 5, 61)
Partition 2 has different physical/logical endings:
     phys=(353, 115, 52) logical=(3505179, 0, 59)
Partition 2 does not end on cylinder boundary.
/dev/sdb1p3   ?     1646072     1872638   112376377+  62  Unknown
Partition 3 has different physical/logical beginnings (non-Linux?):
     phys=(357, 108, 41) logical=(1646071, 13, 45)
Partition 3 has different physical/logical endings:
     phys=(357, 105, 39) logical=(1872637, 2, 9)
Partition 3 does not end on cylinder boundary.
/dev/sdb1p4   ?           1     3496311  1734170112    0  Empty
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=(3496310, 11, 22)
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order