== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:04:43 (1787843083)

1.774944s, 4.72613MB/s
Read-ahead success for size 8192

1.937110s, 4.33048MB/s
Read-ahead success for size 16384

2.400933s, 3.4939MB/s
Read-ahead success for size 32768

1.571243s, 5.33884MB/s
Read-ahead success for size 65536

1.094926s, 7.66135MB/s
Read-ahead success for size 131072

1.771572s, 4.73512MB/s
Read-ahead success for size 262144

1.132543s, 7.40688MB/s
Read-ahead success for size 524288

1.478657s, 5.67313MB/s
Read-ahead success for size 1048576