On Thu, 1 Jul 2010 23:30:26 +0300
"Majed B." [off-list ref] wrote:

How much RAM does your machine have?

Write to the disk an amount that is larger than the amount of RAM and
see if you get the same result.

Also you can use hdparm to flush the caches before running dd the 2nd time.

Here we go again. Read up on what conv=fdatasync means, and why cache is
irrelevant in this test.

-- 
With respect,
Roman