Thanks for definitive answer and the link to a great thread. I need
one more:

I have to set the heads and cylinders on the disk partitions of the
virtualized servers. Now I assume I also have to set heads and
cylinders on the raid partions, exported by the targets. Is this
assumption correct?



On Dec 22, 1:51 pm, "Bart Van Assche" <>
> On Mon, Dec 22, 2008 at 1:18 PM, Ulrich Windl
> <> wrote:
> > I think since ZBR (Zone Bit Recording) the number of sectors per cylinder is
> > variable. thus it makes no sense for any higher-level disk software to try 
> > to deal
> > with heads or cylinders. Since ATA (about 1990) only the controller on the 
> > disk
> > knows the tracks, heads, and cylinders. The rest is just logic. Therefore 
> > SCSI
> > (nad now LBA) just uses logical block numbers.
> At least with IET, changing the heads/sector values for the exported
> disk does improve speed. See 
> also
> Bart.
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