I've now got Samsung's own HD UTIL software working (dos disk with small app).

This is what disk info says:

Model name: Samsung HD103UJ
FW Revision: 1AA01110
Current size: 31 MB (LBA: 65134)
Native size: 953869MB (LBA: 1953525168)
Current AAM mode : disabled
LBA Mode : support
LBA 48 bit mode: ON
DMA mode :support
NCQ mode : support
Maximum queue depth: 32


As you can see it says the s
current size is 31 MB... but it also says the native size is 953869 MB !

I'll try low level formatting now... but then I give up.