Verified:
4.4.0-59-generic $ sudo dd if=/dev/zero of=/dev/RDSVG/RDSRAIDLV bs=8k count=1000000 && sync 1000000+0 records in 1000000+0 records out 8192000000 bytes (8.2 GB, 7.6 GiB) copied, 56.7741 s, 144 MB/s
4.4.0-62-generic $ sudo dd if=/dev/zero of=/dev/RDSVG/RDSRAIDLV bs=8k count=1000000 && sync 1000000+0 records in 1000000+0 records out 8192000000 bytes (8.2 GB, 7.6 GiB) copied, 31.3783 s, 261 MB/s
Verified:
4.4.0-59-generic RDSVG/RDSRAIDLV bs=8k count=1000000 && sync
$ sudo dd if=/dev/zero of=/dev/
1000000+0 records in
1000000+0 records out
8192000000 bytes (8.2 GB, 7.6 GiB) copied, 56.7741 s, 144 MB/s
4.4.0-62-generic RDSVG/RDSRAIDLV bs=8k count=1000000 && sync
$ sudo dd if=/dev/zero of=/dev/
1000000+0 records in
1000000+0 records out
8192000000 bytes (8.2 GB, 7.6 GiB) copied, 31.3783 s, 261 MB/s