== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:27:20 (1790782040)

2.353714s, 3.56399MB/s
Read-ahead success for size 8192

1.134912s, 7.39142MB/s
Read-ahead success for size 16384

2.136896s, 3.9256MB/s
Read-ahead success for size 32768

1.033877s, 8.11374MB/s
Read-ahead success for size 65536

1.550067s, 5.41177MB/s
Read-ahead success for size 131072

1.492989s, 5.61867MB/s
Read-ahead success for size 262144

1.068446s, 7.85122MB/s
Read-ahead success for size 524288

0.952992s, 8.80239MB/s
Read-ahead success for size 1048576