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[ubuntu] Is it possible to have multiple partitions on a mdadm RAID array?

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http://ubuntuforums.org – A while back I created a RAID 6 array consisting of 5 2TB drives and formatted it with XFS and set up the block and stripe size appropriately. Yesterday I added two more 2TB drives to the array and it is almost done reshaping the array. While running that I realized that XFS is optimized for the number of drives, and so far as I can tell there is no way to change that after the fact. Since I have less than 4TB of data that I need to maintain I thought perhaps I could format the new unused space on the array with ext4, copy the data, then remove the XFS partition and expand the ext4 partit (Hardware)