Greetings, I was hit by an infamous hardware incompatibility between VIA VT6420/1 sata card (sata_via) and newer Western Digital drives. The bug has been worked around in mainline kernel at 2.6.32.7, * https://bugzilla.kernel.org/show_bug.cgi?id=15173 * http://article.gmane.org/gmane.linux.ide/46352 * http://thread.gmane.org/gmane.linux.kernel/1062139 The sata_via patch from bug#15173 applies cleanly to sata_via module of 2.6.18-238 and now I'm running using a 'fixed' module with no problem. Unfortunately the patched module uses symbols not from kABI whitelist so universal replacement kernel module could not be made, but the patch itself could be integrated to upstream's tree or into the CentOS-Plus kernel. As I'm not a RHEL subscriber, I can only ask for the latter. Any ideas? Best regards, Dmitry Mikhailov