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From: Michael Schuh <michael.schuh@gmail.com>
Subject: Re: kern/173251: ACHI/ATA_CAM doesn't find any SATA Disk on ICH7 -
 Dell SC430
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The following reply was made to PR kern/173251; it has been noted by GNATS.

From: Michael Schuh <michael.schuh@gmail.com>
To: bug-followup@freebsd.org
Cc:  
Subject: Re: kern/173251: ACHI/ATA_CAM doesn't find any SATA Disk on ICH7 -
 Dell SC430
Date: Thu, 1 Nov 2012 18:49:24 +0100

 After another night with digging the Internet
 i found why the newer RELEASES will not find the SATA drives.
 
 "The BIOS has programmed the chip into IDE mode, not AHCI mode.  It seems
 to have also set up the AHCI BAR, but the majority of chips with this ID
 won't have been and so the ahci driver will fail with them. If the chip
 was in AHCI mode, the device ID would automatically have changed to
 0x27c1."
 
 
 Just this Machine has no BIOS-Options to manage the ICH controller Mode.
 It seems this caused the error, that the drives aren't visible for the
 AHCI-driver.
 
 So i ask, is there a solution/possibility to detect and change the working
 mode of this Controller from the Operating System base/Kernel?