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> hdparm -tT /dev/sda /dev/sda: Timing cached reads: 20724 MB in 2.00 seconds = 10375.81 MB/sec Timing buffered disk reads: 304 MB in 3.02 seconds = 100.60 MB/sec > hdparm --help hdparm - get/set hard disk parameters - version v6.6 Usage: hdparm [options] [device] .. Options: -a get/set fs readahead -A set drive read-lookahead flag (0/1) -b get/set bus state (0 == off, 1 == on, 2 == tristate) -B..