hdparm is a great tool to give yourself an idea of what sort of performance you can expect from your disks and
get a little more info about them.

The most common thing to do is to test the performance/ throughput.

You can do this by using the hdparm commend with -Tt

-T = perform cache read timings
-t = perform device read timings

And the result of running 'hdparm -Tt' is:


# hdparm -Tt /dev/sda

/dev/md2:
Timing cached reads: 22372 MB in 1.99 seconds = 11250.15 MB/sec
Timing buffered disk reads: 146 MB in 3.00 seconds = 48.61 MB/sec

To get more information about a disk you can use hdparm -i or -I

-i = display drive identification
-I = detailed/current information directly from drive

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