From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Tokarev Subject: Re: AHCI + ST3160023AS + NCQ problems Date: Tue, 30 Oct 2007 22:41:40 +0300 Message-ID: <472788F4.60300@msgid.tls.msk.ru> References: <305c16960710291713v22875d26v8ccfc76daab102bd@mail.gmail.com> <47270CE9.4060501@msgid.tls.msk.ru> <311601c90710300615j33bf0959l51b1b2505e9b2048@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from hobbit.corpit.ru ([81.13.94.6]:21183 "EHLO hobbit.corpit.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757484AbXJ3Tlm (ORCPT ); Tue, 30 Oct 2007 15:41:42 -0400 In-Reply-To: <311601c90710300615j33bf0959l51b1b2505e9b2048@mail.gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "Eric D. Mudama" Cc: Matheus Izvekov , linux-ide@vger.kernel.org, jgarzik@pobox.com Eric D. Mudama wrote: > On 10/30/07, Michael Tokarev wrote: >> By the way, did you forget to remove a jumper on the drive >> (the only jumper installed by default) that limits drive >> usage to SATAI? > ... >> ..etc. Try again without the jumper? Note that NCQ is NOT supported >> in SATAI mode, or there were some pre-standard implementations of it. >> In SATAII, NCQ is standard (well... more or less anyway ;) > > Huh? > > To my knowledge, the jumper should only limit the bus rate to > 1.5Gbit/s, for compatibility with one or more chipsets. It shouldn't > affect the command set supported by the device. The thing is that I don't know. I had some other probs with seagate sata drives when the jumper was there. So I learned a lesson - always remove the jumper before using their drives. I don't want to test which other restrictions this and other drive families apply when jumpered... ;) /mjt