== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:16:08 (1785078968)

2.536997s, 3.30651MB/s
Read-ahead success for size 8192

2.734728s, 3.06744MB/s
Read-ahead success for size 16384

2.449064s, 3.42523MB/s
Read-ahead success for size 32768

1.419765s, 5.90845MB/s
Read-ahead success for size 65536

2.347798s, 3.57297MB/s
Read-ahead success for size 131072

1.651491s, 5.07941MB/s
Read-ahead success for size 262144

1.454002s, 5.76932MB/s
Read-ahead success for size 524288

1.465307s, 5.72481MB/s
Read-ahead success for size 1048576