====== Ubuntu - Benchmark - Disk Speedtest using hdparm ======

The **hdparm** tool is available out of the box in most Linux distributions.

<code bash>
hdparm -tT /dev/sda1
</code>

result:

<code bash>
/dev/sda1:
 Timing cached reads:   20780 MB in  1.99 seconds = 10416.77 MB/sec
 Timing buffered disk reads: 620 MB in  3.01 seconds = 206.13 MB/sec
</code>


There are multiple things to understand here in the above hdparm results.  The **-t** Option will show you the speed of reading from the cache buffer (That's why it's much much higher).

The **-T** option will show you the speed of reading without precached buffer(which from the above output is low 206.13 MB/sec as shown above.)

The hdparm output shows you both the cached reads and disk reads separately.