Sounds like you have a BIOS limitation that doesn't support 48-bit LBA. Or
turned off in the BIOS.

Intel's IAA would solve the problem, but don't know if it is supported in
Vista.

Tom
"Roy" wrote in message
...
I can't get Vista to recognise the HD has 200gbs on board, it's showing
127.
I had this prob with XP, but the Maxtor Big Disk Enabler patch sorted that
out. But it won't on Vista any ideas?