Simon Matthews wrote:
quoted text
> I have a couple of machines on which this is happening now --
>
> When the machine boots, the RAID arrays (RAID 1) start, but each array
> only has one component device. I can add the other component again
> (using mdadm --add ... ) and the array will sync up, but next time it
> boots, I have to do the same once more.
>
> Why is this and how do I fix it?
>   

Might that be a /etc/mdadm/mdadm.conf in the initramfs listing fewer 
devices than it should?
I am not sure (because in this case maybe it shouldn't autoassemble the 
array at all), but have a look by unpacking your initramfs. If yes, 
update it.
Or could that be a controller that shows the disks to the kernel too 
late... do you have multiple controllers?
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