From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Matheus Izvekov" Subject: Re: AHCI + ST3160023AS + NCQ problems Date: Wed, 7 Nov 2007 04:21:42 -0200 Message-ID: <305c16960711062221u69e8eb37p1367b18343d0e2a5@mail.gmail.com> References: <305c16960710291713v22875d26v8ccfc76daab102bd@mail.gmail.com> <47270CE9.4060501@msgid.tls.msk.ru> <311601c90710300615j33bf0959l51b1b2505e9b2048@mail.gmail.com> <472788F4.60300@msgid.tls.msk.ru> <305c16960710301728j557689a5rbec52a11ec606963@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from py-out-1112.google.com ([64.233.166.177]:25260 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750821AbXKGGVo (ORCPT ); Wed, 7 Nov 2007 01:21:44 -0500 Received: by py-out-1112.google.com with SMTP id u77so4188861pyb for ; Tue, 06 Nov 2007 22:21:43 -0800 (PST) In-Reply-To: <305c16960710301728j557689a5rbec52a11ec606963@mail.gmail.com> Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Michael Tokarev Cc: "Eric D. Mudama" , linux-ide@vger.kernel.org, jgarzik@pobox.com On 10/30/07, Matheus Izvekov wrote: > On 10/30/07, Michael Tokarev wrote: > > 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 > > > > Indeed removing the jumper of sdb made it be recognised as SATA2. But > sdc, what the problem is really about, is neither SATA2, not has any > jumper whatsoever. but both the manufacturer and libata claim it > supports NCQ. > Anything i could do to help debug this? or perhaps it makes more sense to just blacklist NCQ for this particular drive?