On Wed, 14 Oct 2009, Ken Teh wrote:

> I just installed SL5.3 on a Supermicro PDSBE motherboard and its disk i/o is 
> painfully slow; about 3MB/s.  The system has SATA drives but the kernel sees 
> them as /dev/hdx devices.  There is also a ata_piix message at the beginning 
> of bootup that says "no available legacy port".  I'm guessing the failure to 
> recognize the SATA drives as /dev/sdx and the slow disk i/o are related to 
> this cryptic message.
>
> I tried switching the SATA mode in the BIOS to compability instead of 
> enhanced.  It didn't make any difference.  I wasn't expecting any.  The 
> compatibility vs native stuff, I thought, was something that was done when 
> SATA support for spotty.  The SATA controller is an Intel ICH8 which I figure 
> should be well supported.

> Any ideas on how to proceed?  Build a custom kernel?  Which I am reluctant to 
> do since I rely on SL for updates.

Try SL5.4 ?

-- 
Dr. Andrew C. Aitchison		Computer Officer, DPMMS, Cambridge
[log in to unmask]	http://www.dpmms.cam.ac.uk/~werdna