The power of hdparm

This shows the power of a well set hard disk controller:

BEFORE:
johnny:~# hdparm -tT /dev/hda

/dev/hda:
Timing buffer-cache reads: 128 MB in 0.58 seconds =220.69 MB/sec
Timing buffered disk reads: 64 MB in 8.89 seconds = 7.20 MB/sec

AFTER:
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.60 seconds =212.66 MB/sec
Timing buffered disk reads: 64 MB in 1.57 seconds = 40.72 MB/sec

PS: The second test was made when the machine was under production. So the benchmark is underrated.

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