OK I've worked it out.
Basically the spec is a bit misleading when it claims to support up to
4 SATA and up to 4 PATA devices in RAID 0, 1 or 0+1.
Rereading the manual;
- you can only have 2 SATA devices if you have any PATA devices
installed
- only 2 SATA devices are supported in a RAID array
- only 2 PATA devices are supported in a RAID array
- if you want RAID 0+1 (RAID10) you need to build it with 2 SATA
devices and 2 PATA devices.
Now seeing as SATA is UDMA150 but PATA is UDMA133 the two PATA devices
are going to slow down the RAID array. As you'd only choose RAID10
over RAID0 for the extra speed this seems a bit pointless (assuming
the drives keep the buses maxed out, in reality this probably isn't
the case as the physical drives will be slower unless reading from the
cache).
So to get the RAID config to come up I just had to unplug my extra 2
SATA devices and now I have a config that's "valid" for the RAID
supported by the motherboard.
My solution, spend another £75 and buy a promise S-ATA 150TX4 Plus
4Port RAID card.
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