From owner-freebsd-fs@freebsd.org Tue Feb 16 03:31:36 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2EC7CAAAC04 for ; Tue, 16 Feb 2016 03:31:36 +0000 (UTC) (envelope-from rpokala@mac.com) Received: from mr11p00im-asmtp001.me.com (mr11p00im-asmtp001.me.com [17.110.69.252]) (using TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1E471632 for ; Tue, 16 Feb 2016 03:31:36 +0000 (UTC) (envelope-from rpokala@mac.com) Received: from [172.20.10.3] (unknown [172.56.39.94]) by mr11p00im-asmtp001.me.com (Oracle Communications Messaging Server 7.0.5.36.0 64bit (built Sep 8 2015)) with ESMTPSA id <0O2M0082RF4MA030@mr11p00im-asmtp001.me.com> for freebsd-fs@freebsd.org; Tue, 16 Feb 2016 03:31:35 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-02-16_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 clxscore=1015 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1510270003 definitions=main-1602160063 User-Agent: Microsoft-MacOutlook/0.0.0.160109 Date: Mon, 15 Feb 2016 19:31:32 -0800 Subject: Re: Hours of tiny transfers at the end of a ZFS resilver? From: Ravi Pokala Sender: "Pokala, Ravi" To: "freebsd-fs@freebsd.org" Message-id: <871E2D0C-C131-407E-A982-6AFE896901F6@panasas.com> Thread-topic: Hours of tiny transfers at the end of a ZFS resilver? MIME-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Feb 2016 03:31:36 -0000 >Date: Mon, 15 Feb 2016 21:08:43 +0000 >From: Steven Hartland >To: freebsd-fs@freebsd.org >Subject: Re: Hours of tiny transfers at the end of a ZFS resilver? >Message-ID: <56C23E5B.7060207@multiplay.co.uk> >Content-Type: text/plain; charset=windows-1252; format=flowed Hi Steve, >>[*] This is probably a good segue into discussing why we even have the ADA_Q_4K quirk, and whether we should get rid of it...? --rp >The 4k quirks exists because a large amount of devices don't report 4k correctly instead just reporting 512 for both logical and physical even when they are actually 4k or larger physical sector size. If true, that's a gross violation of ATA, and I would consider that a disqualifying firmware bug. After over a decade at a storage vendor, I've seen some *really* stupid firmware issues, but lying about the sector size would be a new low. :-( Are we sure that they are really, truly claiming to be 512n rather than AF-512e, rather than us mis-parsing the sector sizes due to the aforementioned kernel bugs? If someone running -CURRENT has a drive which has the ADA_Q_4K quirk, could you paste the output of `geom disk list $DRIVE'? Thanks, Ravi (rpokala@)