mdX: WARNING: ram0 appears to be on the same physical disk as ram0.
True protection against single-disk failure might be compromised.
md/raid10:mdX: unsupported raid10 layout: 0x       2
md: pers->run() failed ...
device-mapper: table: 248:3: raid: Failed to run raid array (-EINVAL)
device-mapper: ioctl: error adding target to table