[CentOS] hdparm strangeness

[Johnny Hughes]

On Mon, 2006-03-13 at 08:44 +0100, Peter Kjellström wrote:
> Hello,
> 
> I had a very similar problem with a bunch of supermicro boards (X6DVL-EG2). 
> The problem was that the bios somehow confused libata so badly that it fell 
> back to using the old ide legacy whatever thingy (resulting in hda instead of 
> sda and of course no dma).
> 
> The solution was to fiddle with the sata settings in bios. Strangely enough, 
> enabling mixed mode (pata and sata) in bios resulted in something the kernel 
> could understand and libata has been happy ever since (reporting combined 
> mode operation in dmesg).
> 

cap makes a very good point.  All the sata drives I use are registered
as scsi drives and not ide drives (sda and sdb NOT hda and hdb).

try our new 2.6.9-34.EL kernel.

also make sure the motherboard has the latest bios from the
manufacturer.
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