== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:47:33 (1781236053)

1.725622s, 4.86121MB/s
Read-ahead success for size 8192

1.875152s, 4.47356MB/s
Read-ahead success for size 16384

2.079704s, 4.03356MB/s
Read-ahead success for size 32768

1.898489s, 4.41857MB/s
Read-ahead success for size 65536

1.523412s, 5.50646MB/s
Read-ahead success for size 131072

1.673304s, 5.0132MB/s
Read-ahead success for size 262144

1.473141s, 5.69437MB/s
Read-ahead success for size 524288

1.288078s, 6.5125MB/s
Read-ahead success for size 1048576