QA output created by 158 ERROR: cannot scan /dev/nullb0: Input/output error wrote 131072/131072 bytes at offset 0 XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) 0000000 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa * 0400000