>I have been attempting to set up a test server using OS 200811 (rc2)
>
>The system is a 4 Gbyte Dell Optiplex 755, which has dual core 2 duo cpus.
>I created four 10 Gbyte files and two 20Gbyte files under /home using dd
>from /dev/zero.  I then created two zpools; the first I created a stripe of
>two of the 10Gbyte files and then mirrored it with the remaining two files,
>the second pool I simply created a mirror of two 20 Gbyte files.

If you use this trick on UFS, the performance will not be stellar;
however, you have created nearly continguous files.

But in ZFS, the data of the two files will be randomly located;
everytime you write to the files, the data will move around.
This is not at all what ZFS expects.

You should try again using a "zvol" by using zfs create -V.

Casper
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