CentOS - Oct 2007 - Buggy SATA detection w/CentOS5 + Intel H6300ESB?

I've been handed a Supermicro system that is using the Intel? H6300ESB 
Serial ATA Controller (Supermicro P4SCI motherboard).  When I install 
CentOS5, everything seems to work OK, but it has absolutely horrid disk 
performance.  Upon further inspection, it seems that the SATA disks are 
being treated as legacy IDE devices using PIO.  Gah....

Has anyone else had this problem?  I recall having similar problems last 
year sometime with some Supermicro systems, but I can't seem to remember 
how I fixed it.  :-) 

Any suggestions would be much appreciated.

Best,

on 10/2/2007 12:29 PM Chris Mauritz spake the following:
> I've been handed a Supermicro system that is using the Intel? H6300ESB 
> Serial ATA Controller (Supermicro P4SCI motherboard).  When I install 
> CentOS5, everything seems to work OK, but it has absolutely horrid disk 
> performance.  Upon further inspection, it seems that the SATA disks are 
> being treated as legacy IDE devices using PIO.  Gah....
> 
> Has anyone else had this problem?  I recall having similar problems last 
> year sometime with some Supermicro systems, but I can't seem to
remember
> how I fixed it.  :-)
> Any suggestions would be much appreciated.
> 
> Best,
Is the sata set to legacy mode in the bios?


-- 
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

Chris Mauritz wrote:
> I've been handed a Supermicro system that is using the Intel? H6300ESB 
> Serial ATA Controller (Supermicro P4SCI motherboard).  When I install 
> CentOS5, everything seems to work OK, but it has absolutely horrid 
> disk performance.  Upon further inspection, it seems that the SATA 
> disks are being treated as legacy IDE devices using PIO.  Gah....
>
> Has anyone else had this problem?  I recall having similar problems 
> last year sometime with some Supermicro systems, but I can't seem to 
> remember how I fixed it.  :-)
> Any suggestions would be much appreciated.
Sorry to follow-up my own post.  The answer (after digging through a 
stack of old notes) seems to be that you must go into the bios settings 
and change the SATA controller to "enhanced mode".  Using
"SATA" and
"IDE" both resulted in the disks being discovered as PIO IDE disks 
instead of SCSI devices.

Best,