On Mon, Jul 5, 2010 at 4:59 PM, Robert Hancock <hancockrwd@xxxxxxxxx> wrote: > On 07/05/2010 10:48 AM, Mark Knecht wrote: >> >> On Sun, Jul 4, 2010 at 11:19 PM, Tejun Heo<tj@xxxxxxxxxx> wrote: >>> >>> Hello, >>> >>> On 07/04/2010 12:31 AM, Mark Knecht wrote: >>>> >>>> OK, I don't know if this is related but so far I cannot get the >>>> machine to boot if I set BIOS SATA configuration to AHCI. I believe >>>> that I have AHCI support as well as SATA support built into the kernel >>>> but when I set the BIOS to AHCI the machine just hangs saying it finds >>>> no medium. I assume that means no hard drive. I have to set SATA >>>> support to enhanced and then IDE to get the machine to boot at all. >>> >>> That's odd. Can you please attach kernel boot log w/ ahci mode? >>> Booting a recent live CD and saving boot log from there should do the >>> trick. >>> >>> Thanks. >>> >>> -- >>> tejun >>> >> >> Hi Tehun, >> Thanks for the help. >> >> I tried a Gentoo install CD from last march. It's a 2.6.31 type >> kernel. Problem is the buffer depths are not big enough to capture the >> complete dmesg contents and I don't know a command line option to make >> it larger on the fly. If you know of one that's got a larger buffer - >> or a command to increase it at boot time - then let me know and I'll >> try again. >> >> I'm attaching what I was able to catch for both AHCI and IDE >> settings in BIOS for the storage configuration option. >> >> It seems to me that even in AHCI mode the machine does see all the >> hard drives. Maybe there's something about my boot partition that's >> having problems in AHCI mode only? If it sees /dev/sda then why >> wouldn't it find grub and at least show a grub menu? > > On some machines changing from IDE to AHCI messes up the boot order > selection in the BIOS - you may have to switch to AHCI, save settings, > reboot, go back into the BIOS and then make sure the disk boot order > settings are correct (whatever drive grub is installed on needs to be > first). > That's a very interesting idea Robert. Thanks. I'll have to be careful. I have 5 identical drives in the machine so figuring out which is which when I'm in BIOS might be a bit of a trick. I'll give it a go and report back. Cheers, Mark -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
