No jumpers on SATA save that one the cuts the speed so don't waste your time on that.
But are you aware that in today's machines they emulate IDE when you connect with SATA to make it easy on today's techs and builders? That is you may have to catch up with what your motherboard is doing.
Many BIOS's have this feature and some limit to 2 devices in the emulation. Some do 4 but it all comes back to the BIOS, motherboard and OS drivers.
i have a new Dell 531 that i didn't even realize was SATA until i just added a second HD - i'm not familiar with this type of MB (not sure what kind i have, actually) but i have a problem, i think. the original HD is a Western D and the new one is a 500G Seagate; the generic DVD=/-RW is also connected SATA, and i'm only able to get my MB to see 2 devices, in ports SATA0 and SATA1 (it sees my two HDs as Masters 3 and 4 ??? if they're in 0 and 1 and if i replace one HD with the DVD ROM then it sees the HD and the DVD...).
There's no info in the Seagate docs on how to place the jumpers, but i don't think that's the problem since it's the ports 2 and 3 that are not being seen.
there's no reason to think that the MB has gone bad...
can anyone please help?