dirty degraded md raid array
I find myself in the situation that I have a degraded raid array that reads as dirty, so I cannot start it. I have a "spare" partition (until yesterday, this was the 5th segment, but for some reason my system now keeps it as a spare in a degraded array.) I know the drive itself is good, as I have two other md raid arrays that each have a section on it.
mdadm -E /dev/sdX shows me that the different parts of the array do not agree about how many sections are present. there are 5 devices in the array, 2 of them show 5 working devices, 4 active, 1 spare, while the 3 others show only 4 working, all active.
how can I make the devices agree on this?