ROSE - Cannot Create/Format 2nd RAID Array

RouterOS General
1

I have a new RDS with 20 1 TB u.2 drives. I was successfully able to create a BTRFS RAID10 array using the Mikrotik documentation for drives 1-10.

When attempting to create a second RAID 10 array with drives 11-20, RouterOS hangs when trying to format the array w/ a BTRFS file system. I select ‘y’ when prompted regarding data loss, but then the format never completes, even after an hour. See screenshot below

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Config:

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2

I was able to resolve this by formatting the 2nd array as ext4, then re-format as btrfs. These were brand new SSD-U2-7-1TB drives from a Mikrotik distributor.