From owner-freebsd-questions@freebsd.org Tue May 10 09:17:39 2016 Return-Path: Delivered-To: freebsd-questions@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 79636B33C9C for ; Tue, 10 May 2016 09:17:39 +0000 (UTC) (envelope-from schweikh@schweikhardt.net) Received: from rs2.shuttle.de (rs2.shuttle.de [IPv6:2001:638:206:3::8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 44ACE1504 for ; Tue, 10 May 2016 09:17:39 +0000 (UTC) (envelope-from schweikh@schweikhardt.net) Received: by rs2.shuttle.de (Postfix, from userid 10) id 65E5840A2; Tue, 10 May 2016 11:17:36 +0200 (CEST) Received: from hal9k.schweikhardt.net (localhost [127.0.0.1]) by hal9k.schweikhardt.net (8.15.2/8.15.2) with ESMTP id u4A9HQ1d002366 for ; Tue, 10 May 2016 11:17:26 +0200 (CEST) (envelope-from schweikh@hal9k.schweikhardt.net) Received: (from schweikh@localhost) by hal9k.schweikhardt.net (8.15.2/8.15.2/Submit) id u4A9HQs9002365 for freebsd-questions@freebsd.org; Tue, 10 May 2016 11:17:26 +0200 (CEST) (envelope-from schweikh) Date: Tue, 10 May 2016 11:17:26 +0200 From: Jens Schweikhardt To: FreeBSD questions Subject: External HD sometimes doesn't attach, how to re-probe? Message-ID: <20160510091726.GA1594@schweikhardt.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.6.1 (2016-04-27) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 May 2016 09:17:39 -0000 hello, world\n I have this disk in an Icy Box connected via USB3: da0 at umass-sim0 bus 0 scbus11 target 0 lun 0 da0: Fixed Direct Access SCSI device da0: 400.000MB/s transfers da0: 3815447MB (7814037168 512 byte sectors) da0: quirks=0x2 Every now and then (1 in 10 or so), when I power-up the Icy Box, the drive spins up, but the device nodes do not appear. I then try to "camcontrol rescan all", restart devd and devfs, but it has no effect. Invariably I end up power-cycling the Icy Box, which always works. Is there a different way to "re-probe" disks connected via USB when they fail to attach on the first try? Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)