From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Another SATA device with spurious NCQ completions Date: Tue, 03 Jul 2007 16:42:30 +0900 Message-ID: <4689FDE6.2080806@gmail.com> References: <46800AD3.7050803@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from wa-out-1112.google.com ([209.85.146.179]:21714 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752058AbXGCHnx (ORCPT ); Tue, 3 Jul 2007 03:43:53 -0400 Received: by wa-out-1112.google.com with SMTP id v27so2657801wah for ; Tue, 03 Jul 2007 00:43:53 -0700 (PDT) In-Reply-To: <46800AD3.7050803@redhat.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Chuck Ebbert Cc: IDE/ATA development list Chuck Ebbert wrote: > From: > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245512 > > > The following error consistently appears at apparently random intervals in syslog: > > kernel: ata1.00: exception Emask 0x2 SAct 0x1001 SErr 0x0 action 0x2 frozen > kernel: ata1.00: (spurious completions during NCQ issue=0x0 SAct=0x1001 > FIS=004040a1:00000800) > kernel: ata1.00: cmd 61/08:00:39:2b:cc/00:00:08:00:00/40 tag 0 cdb 0x0 data 4096 out > kernel: res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM violation) > kernel: ata1.00: cmd 61/08:60:e1:2b:cc/00:00:08:00:00/40 tag 12 cdb 0x0 data > 4096 out > kernel: res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM violation) > > Controller is ATI SB600 using the AHCI driver. > 64-bit DMA is disabled. > Disk is: > ata1.00: ATA-7: ST3160812AS, 3.ADJ, max UDMA/133 > > > Can't we just turn off NCQ automatically when this happens? After sever such occasions, NCQ will be turned off automatically. Hmm... It's a bit surprising to see this on a Seagate drive tho. Can someone crosscheck this by attaching the drive to an intel ahci? -- tejun