QA output created by 306
== try to create new file
touch: cannot touch `SCRATCH_MNT/this_should_fail': Read-only file system
== pwrite to null device
wrote 512/512 bytes at offset 0
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== pread from zero device
read 512/512 bytes at offset 0
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== truncating write to null device
== appending write to null device