root@antgentoo #>hdparm -Tt /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1580 MB in  2.00 seconds = 788.82 MB/sec
 Timing buffered disk reads:  152 MB in  3.03 seconds =  50.12 MB/sec
root@antgentoo #>hdparm -Tv /dev/hda

/dev/hda:
 multcount    = 16 (on)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    =  8 (on)
 geometry     = 24321/255/63, sectors = 390721968, start = 0
 Timing buffer-cache reads:   1604 MB in  2.00 seconds = 800.80 MB/sec
root@antgentoo #>hdparm -Tt /dev/hda

/dev/hda:
 Timing buffer-cache reads:   1608 MB in  2.00 seconds = 803.60 MB/sec
 Timing buffered disk reads:  152 MB in  3.03 seconds =  50.23 MB/sec