Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755616Ab0A1UTO (ORCPT ); Thu, 28 Jan 2010 15:19:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754257Ab0A1UTO (ORCPT ); Thu, 28 Jan 2010 15:19:14 -0500 Received: from mail-iw0-f172.google.com ([209.85.223.172]:47022 "EHLO mail-iw0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752159Ab0A1UTN (ORCPT ); Thu, 28 Jan 2010 15:19:13 -0500 X-Greylist: delayed 424 seconds by postgrey-1.27 at vger.kernel.org; Thu, 28 Jan 2010 15:19:12 EST MIME-Version: 1.0 X-Originating-IP: [66.187.234.200] In-Reply-To: References: <20100126160243.018b87e3@lxorguk.ukuu.org.uk> <72dbd3151001261251s606ebf00h86c2ce63293305b6@mail.gmail.com> Date: Thu, 28 Jan 2010 15:12:07 -0500 Message-ID: Subject: Re: [PATCH] ata: Disable NCQ for Crucial M225 brand SSDs From: Jarod Wilson To: Vishal Rao Cc: David Rees , Alan Cox , jgarzik@pobox.com, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, trivial@kernel.org, stable@kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1460 Lines: 38 On Wed, Jan 27, 2010 at 11:14 AM, Vishal Rao wrote: > 2010/1/27 Jarod Wilson : >> How to define a group gets... Messy. Just as a data point, my own >> Barefoot-based SSD, an OCZ Vertex, has no NCQ-related problems >> whatsoever, so far as I know. Its currently hooked to a Zotac ION >> board, which has ahci-driven sata controllers of some sort, was >> previously in a Dell Studio Hybrid, where it also worked just fine. > > Thanks for data point. I'm personally hoping for other Crucial users > specifically. > > Is NCQ enabled - if you grep dmesg for ata ? $ dmesg | grep -i ncq ahci 0000:00:0b.0: flags: 64bit ncq sntf led pmp pio slum part sxs ata1.00: 62533296 sectors, multi 16: LBA48 NCQ (depth 31/32), AA > The kernel already appears to blacklist (disable NCQ for) OCZ > SSD models with firmware version "02.10104". Here's what I've got: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: ATA-7: OCZ-VERTEX 1275, 00.P97, max UDMA/133 ata1.00: 62533296 sectors, multi 16: LBA48 NCQ (depth 31/32), AA ata1.00: configured for UDMA/133 scsi 0:0:0:0: Direct-Access ATA OCZ-VERTEX 1275 00.P PQ: 0 ANSI: 5 -- Jarod Wilson jarod@wilsonet.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/