I co-worker had two drives configured as a stripe on a motherboard with an on-board Promise FastTrak 133. The motherboard failed, and we've been unable to find any others with an on-board Promise controller which can recognize the array.

With Linux or some disk editors, I can see data on both drives... and I want to see if I can combine the data from both drives onto a single, larger drive. But I need to know how that information is interleaved on the drives.

I've tried dmraid on Linux, but that doesn't recognize the drives as an array. I guess I could just try combining alternating blocks from the drives, starting with a block size of 256B and keep doubling until I get a result that looks intact. But I'd like to avoid that if someone already knows how Promise controllers spread the data over a striped array.