[root@acesso ~]# hdparm -t /dev/vda2

/dev/vda2:
 Timing buffered disk reads: 286 MB in  3.02 seconds =  94.71 MB/sec
[root@acesso ~]# hdparm -t /dev/vda2

/dev/vda2:
 Timing buffered disk reads: 454 MB in  3.02 seconds = 150.09 MB/sec
[root@acesso ~]# hdparm -t /dev/vda2

/dev/vda2:
 Timing buffered disk reads: 746 MB in  3.01 seconds = 247.83 MB/sec
[root@acesso ~]# hdparm -t /dev/vda2

/dev/vda2:
 Timing buffered disk reads: 882 MB in  3.04 seconds = 289.96 MB/sec
[root@acesso ~]# hdparm -t /dev/vda2

/dev/vda2:
 Timing buffered disk reads: 1072 MB in  3.00 seconds = 357.33 MB/sec