Thanks Greg. I've been asking a bunch of people and no one had a clue what was going on. I wanted to enable this on a brand new MySQL server to help cope with I/O load but I'm not in a hurry, we'll see if Novell releases a patch, if not I can put a newer kernel once it arrives. Just out of curiosity, were the steps I took correct ?
-- Best regards, Nick Zeljkovic -----Original Message----- From: Greg Freemyer [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 22, 2008 6:06 PM To: opensuse@opensuse.org Subject: Re: [opensuse] AHCI / NCQ problem On Jan 19, 2008 1:08 PM, Nick Zeljkovic <[EMAIL PROTECTED]> wrote: > Hi, > > I'm having problems activating NCQ on Asus P5B-MX , Seagate Barracuda > ST3250410AS (250GB) with Opensuse 10.3 installed. > Before installation I've set in BIOS Enhanced IDE configuration for S-ATA > mode (from my understanding that enables advanced features like NCQ), > installed the system no problem. After first boot I've noticed ahci driver > wasn't loaded, only ata_piix, so I've edited /etc/sysconfig/kernel and added > ahci before ata_piix driver, rebuilt initrd, edited modprobe.conf and > replaced ata_piix occurrences with ahci. > Original line: > # ata_piix can't handle ICH6 in AHCI mode > install ata_piix /sbin/modprobe ahci 2>&1 |:; /sbin/modprobe > --ignore-install ata_piix > > My line: > # ata_piix can't handle ICH6 in AHCI mode > install ahci /sbin/modprobe ahci 2>&1 |:; /sbin/modprobe --ignore-install > ahci > > After reboot I saw ahci loaded under libata but after ata_piix > libata | ata_piix, ahci > > and actually used was ata_piix despite being loaded first. I've then: > # dmesg|grep NCQ > > And got a line back like: > > ata3.00: ATA-7, 321672960 sectors: LBA48 NCQ (depth 0/32) > > # echo 31 > /sys/block/sda/device/queue_depth > > resulted in permission denied. (as I found on linux-ata FAQ) Further reading > on linux-ata FAQ says: > "If the line containing the sector count and maximum UDMA speed does not > mention NCQ, your drive does not support it." > I'm puzzled since I have UDMA showing on: > # dmesg|grep ata3 > > Which displays all disk info, and "NCQ (depth 0/32)" would mean NCQ is > present but disabled. > > From what I can see disk should support NCQ and I was informed by person who > sold it to me that it was NCQ ready. (I specifically wanted NCQ disk). > > I don't know if I'm making a mistake somewhere or disk just doesn't support > it. I'm in for some help please! > > P.S. Yes I've rebooted ;) > > -- > Best regards, > Nick Zeljkovic Nick, Linux'es implementation of NCQ had some fundamental problems that have been fixed in the soon to be released 2.6.24 Due to the bug, a bunch of drives got blacklisted. The majority of that blacklist has been removed from the 2.6.24 rc series. I have not read about those patches having been released by Novell for the SUSE kernels. (A Novell employee found the problem and wrote the fix so I would hope his work will get into their kernel eventually.) So, you can either wait for that to happen (if it happens), or you can move to a recent KOTD kernel. FYI: I don't know how stable the KOTD kernels are right now. 2.6.24 has been very slow to get released, so I assume there must be some regression(s) they are trying to resolve currently. Greg -- Greg Freemyer Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
