From owner-freebsd-fs@FreeBSD.ORG Mon Nov 12 09:19:11 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3EDA1550 for ; Mon, 12 Nov 2012 09:19:11 +0000 (UTC) (envelope-from prvs=1663cb00d2=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id BA7188FC08 for ; Mon, 12 Nov 2012 09:19:10 +0000 (UTC) Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50001029766.msg for ; Mon, 12 Nov 2012 09:18:30 +0000 X-Spam-Processed: mail1.multiplay.co.uk, Mon, 12 Nov 2012 09:18:30 +0000 (not processed: message from valid local sender) X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=1663cb00d2=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk X-MDaemon-Deliver-To: freebsd-fs@freebsd.org Message-ID: <6E97CF2618534750AE82D23332C6CADC@multiplay.co.uk> From: "Steven Hartland" To: "Daniel Kalchev" , "Freddie Cash" References: <1350698905.86715.33.camel@btw.pki2.com> <1350711509.86715.59.camel@btw.pki2.com> <50825598.3070505@FreeBSD.org> <1350744349.88577.10.camel@btw.pki2.com> <1350765093.86715.69.camel@btw.pki2.com> <508322EC.4080700@FreeBSD.org> <1350778257.86715.106.camel@btw.pki2.com> <5084F6D5.5080400@digsys.bg> <50A0ADDA.9040205@digsys.bg> Subject: Re: ZFS HBAs + LSI chip sets (Was: ZFS hang (system #2)) Date: Mon, 12 Nov 2012 09:18:41 -0000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Nov 2012 09:19:11 -0000 ----- Original Message ----- From: "Daniel Kalchev" > As weird as it sounds, I discovered that my SSD-only zpool (raidz1) was > using ashift=9. So, changed to ashift=12 and not seen disconnects > anymore for a week now. Is 4k good for these SSDs? Or 8k is better, or > larger? > > It seems it's really an SSD firmware problem, as the SSDs are likely > doing more work when used with 512b sectors and from time to time fail > to communicate properly with the bus. The SSDs are OCZ-VERTEX4 (firmware > 1.5). > > Sometimes it seems to be drive related problem and perhaps the mps > driver/hardware is too sensitive to drive issues. I don't know any SSD or drives for that matter using larger than 4k sectors. Could you post the output from:- camcontrol identify I've got a list of other 4k drives to add quirks for so might as well include this one while I'm at it :) Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.