From owner-freebsd-fs@FreeBSD.ORG Sun Mar 29 23:52:09 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BF373106566B for ; Sun, 29 Mar 2009 23:52:09 +0000 (UTC) (envelope-from james-freebsd-fs2@jrv.org) Received: from mail.jrv.org (adsl-70-243-84-9.dsl.austtx.swbell.net [70.243.84.9]) by mx1.freebsd.org (Postfix) with ESMTP id 81FFD8FC15 for ; Sun, 29 Mar 2009 23:52:09 +0000 (UTC) (envelope-from james-freebsd-fs2@jrv.org) Received: from kremvax.housenet.jrv (kremvax.housenet.jrv [192.168.3.124]) by mail.jrv.org (8.14.3/8.14.3) with ESMTP id n2TNptQg006073 for ; Sun, 29 Mar 2009 18:51:55 -0500 (CDT) (envelope-from james-freebsd-fs2@jrv.org) Authentication-Results: mail.jrv.org; domainkeys=pass (testing) header.from=james-freebsd-fs2@jrv.org DomainKey-Signature: a=rsa-sha1; s=enigma; d=jrv.org; c=nofws; q=dns; h=message-id:date:from:user-agent:mime-version:to:subject: content-type:content-transfer-encoding; b=j/Jb2dGIfNYvD7lZkvkKiVVuZ6Uu/OqRiTYzhwC82smhzg3qqdI8eWbWc+ZZpEfVf kvN1H36dk/idoOxeOkod9U6WfjmF2ClgYbRI4ZuKF+KQgDUvNVzLegIGWY1RjBW3Ygd m8yFmxBSCzPqEYAiEAlFDwPhyzeK/Nkc6fz0BDE= Message-ID: <49D0099B.2040807@jrv.org> Date: Sun, 29 Mar 2009 18:51:55 -0500 From: "James R. Van Artsdalen" User-Agent: Thunderbird 2.0.0.21 (Macintosh/20090302) MIME-Version: 1.0 To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: ZFS & USB disks? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 29 Mar 2009 23:52:10 -0000 uname -a: FreeBSD bigtex.housenet.jrv 8.0-CURRENT FreeBSD 8.0-CURRENT #0 r189099: Fri Feb 27 07:09:47 CST 2009 james@bigtex.housenet.jrv:/usr/obj/usr/src/sys/GENERIC amd64 This build is from before the recent USB changes. Is it safe to use ZFS with USB disk drives? The kernel output suggests "SYNCHRONIZE_CACHE" isn't supported. Does this cause a write-ordering problem for ZFS? Upon attaching a drive with a pool created on a Mac: kernel: vdev_geom_attach:112[1]: Attaching to da4. kernel: vdev_geom_attach:153[1]: Created consumer for da4. kernel: (da4:umass-sim0:0:0:1): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0 kernel: (da4:umass-sim0:0:0:1): CAM Status: SCSI Status Error kernel: (da4:umass-sim0:0:0:1): SCSI Status: Check Condition kernel: (da4:umass-sim0:0:0:1): ILLEGAL REQUEST asc:20,0 kernel: (da4:umass-sim0:0:0:1): Invalid command operation code kernel: (da4:umass-sim0:0:0:1): (da4:umass-sim0:0:0:1): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0 kernel: (da4:umass-sim0:0:0:1): ILLEGAL REQUEST asc:20,0 kernel: (da4:umass-sim0:0:0:1): Invalid command operation code kernel: Unretryable error kernel: (da4:umass-sim0:0:0:1): error 22 kernel: (da4:umass-sim0:0:0:1): Unretryable Error