>> So I guess another question here.  Is it better to my SATA interface
>> in Serial ATA mode or AUTO in BIOS?  The motherboard calls it sda when
>> in serial ata mode but hda when in auto mode.  Will there be a
>> performance difference?
>
> It depends on which kernel module gets used, and which version of CentOS 
> we're talking about as to which will perform better.  So research the libata 
> module that drives it when in SATA mode (/dev/sda) versus the straight IDE 
> layer (/dev/hda).
>
> Later kernels and newer CentOS is going to go to /dev/sda either way; 
> /dev/hda is gone from later dists.
>
> Which Supermicro board is this?

This is CentOS 5.x 64 bit updated to latest.  Supermicro
MBD-PDSBM-LN2+-O.  North Bridge: Intel 946GZ South Bridge: Intel
ICH7R.

I always use Supermicro cases and motherboards anymore.  Not too
pricey and pretty good quality.  I like there compact 1u cases that
are relatively inexpensive as well.

Matt
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