raid10 How do I tell what side of the mirror a disk is on?

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Hi,

I recently posted a question to find out how to tell what is sda, b, c,
etc... and I am now using smartctl to get the serial numbers and all is
really great.  Thanks everyone for that info!

Another puzzle is with raid10, there are 2 used in a stripe, then that
stripe is mirrored with the other 2.  My question is how can I tell
"what 2 disks can fail?"  In other words, how can I tell for example if
sda and b are stiped? and that c and d are a mirror of a and b?  How can
I see what is happening with that?  Is there a way to tell?  

Thanks
Rick



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