Just a bump.
As I only have mbr data on sda is there a command that will copy sda mbr to the other 5 drives?
I was wondering about this question, but then I'm a little confused as to your drive layout.
You have 6 drives ? Which guide did you follow as a matter of interest ?
You have
200MB RAID 1 /boot
2000MB RAID 1 / swap
Which two drives are these partitions on ?
Then you have formatted the rest as RAID 10 ?
Assuming you have 2 drives as a RAID 1 boot I think you only need to install the MBR there and not on the remaining drives. I'm not sure there is any benefit in installing on the other drives ?
A greater man than me will tell you if that is a good layout or not - I'm not sure how varying drive losses may/may not affect your data integrity and if it is a good idea to mix RAID 10 on to the RAID 1 drives.
B. Rgds
John