From owner-freebsd-fs@freebsd.org Mon Oct 2 18:12:08 2017 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 59399E235DC for ; Mon, 2 Oct 2017 18:12:08 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wr0-x236.google.com (mail-wr0-x236.google.com [IPv6:2a00:1450:400c:c0c::236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E0ECC71673 for ; Mon, 2 Oct 2017 18:12:07 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wr0-x236.google.com with SMTP id y95so4641941wrb.4 for ; Mon, 02 Oct 2017 11:12:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:subject:message-id:date:to :mime-version; bh=ns3h1BQ68YfnF/86oc+59wdNHLvzcML83/JjDFghP8c=; b=L0kPFGkIUVM3mU2TwnXhXZMVaqZ8hGUYsmz1Wb3qNCmvRRH/S8CtXiFOqUGFwcChm/ Aowy2hBzBmX/lknPTisSrLwt0ldZTLY+R3DXqOwb8Dx09np0hvZrWAgA1BFzFYqXUCy/ NLWxtRDKx3wbd14kCpAiQLrYdNTjMwvbVIOJCg4nub9LKTjflHUS7Yc2Az7J7jKZJPpj w8DztxPwMW72u5uenxf6f/Z5ToXlxpgO6tJChzYO0xevJVSOit1WZhWWCUd4Q8EsK4Oy YPy4OV1+tkk5IZzYD85PdhWaVXiFw3vl2rS8j2d7TH3UuBvTmTIbxucpdgA+mqSSb31f GeXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:subject :message-id:date:to:mime-version; bh=ns3h1BQ68YfnF/86oc+59wdNHLvzcML83/JjDFghP8c=; b=rv7LzmnbM0wfyyJepVcVdvD6H9hWYl4kedrrZ0O9gqc+aFA+bXhgbhu8I0XVMc9QWr deySv6QIYQOC0UcJOWAHonbU5ntnFQmXRE6p5muEiD1i6RtKf9ixtxCbc244H4/pbeNJ KkVl5x6c/Z9kdy8V+oKEQTw/ypUzIfY2IvzkAlH3RrDgTIztcqX1mp5Q0ihKJjmnPy/H oTtgBSjth7NCVXrJl7GUFNmZzj3pQaKfpqfHgmaY1IKUb78xFfqcwJ+mZoBvLEQWO2sJ XoRYKaX/p3qZzbSsTXYXMW1XYu+FgVXR8sFpdJDuY4a14j7ZmqT6pNBxnoc0isVq4Vuo ecEg== X-Gm-Message-State: AHPjjUh8p3b/lyICs8FfsmgEIBTJ+7/pn666XTSmMW8zKFpElpI+UD2h 39s7k1zFViFlPUz+NmY+huAEl7by X-Google-Smtp-Source: AOwi7QBTKZmhO802XM1+0WR0CPg035YLPTUEwArTjdswzLyzufubzVH46+6d4hBvl625oLt3LU/NLw== X-Received: by 10.223.187.74 with SMTP id x10mr13985113wrg.66.1506967926264; Mon, 02 Oct 2017 11:12:06 -0700 (PDT) Received: from bens-mac.home (LFbn-MAR-1-445-220.w2-15.abo.wanadoo.fr. [2.15.38.220]) by smtp.gmail.com with ESMTPSA id i50sm11664820wrf.84.2017.10.02.11.12.04 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 02 Oct 2017 11:12:05 -0700 (PDT) From: Ben RUBSON Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: ZFS stalled after some mirror disks were lost Message-Id: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> Date: Mon, 2 Oct 2017 20:12:03 +0200 To: Freebsd fs Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Oct 2017 18:12:08 -0000 Hi, On a FreeBSD 11 server, the following online/healthy zpool : home mirror-0 label/local1 label/local2 label/iscsi1 label/iscsi2 mirror-1 label/local3 label/local4 label/iscsi3 label/iscsi4 cache label/local5 label/local6 A sustained read throughput of 180 MB/s, 45 MB/s on each iscsi disk according to "zpool iostat", nothing on local disks (strange but I noticed that IOs always prefer iscsi disks to local disks). No write IOs. Let's disconnect all iSCSI disks : iscsictl -Ra Expected behavior : IO activity flawlessly continue on local disks. What happened : All IOs stalled, server only answers to IOs are made to its zroot pool. All commands related to the iSCSI disks (iscsictl), or to ZFS (zfs/zpool), don't return. Questions : Why this behavior ? How to know what happens ? (/var/log/messages says almost nothing) I already disconnected the iSCSI disks without any issue in the past, several times, but there were almost no IOs running. Thank you for your help ! Ben