kern/173251: ACHI/ATA_CAM doesn't find any SATA Disk on ICH7 - Dell SC430
michael.schuh at gmail.com
Thu Nov 1 17:50:01 UTC 2012
The following reply was made to PR kern/173251; it has been noted by GNATS.
From: Michael Schuh <michael.schuh at gmail.com>
To: bug-followup at freebsd.org
Subject: Re: kern/173251: ACHI/ATA_CAM doesn't find any SATA Disk on ICH7 -
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
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
So i ask, is there a solution/possibility to detect and change the working
mode of this Controller from the Operating System base/Kernel?
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