From owner-freebsd-questions@freebsd.org Fri Mar 17 16:49:07 2017 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 1E59CD1080D for ; Fri, 17 Mar 2017 16:49:07 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-wr0-x241.google.com (mail-wr0-x241.google.com [IPv6:2a00:1450:400c:c0c::241]) (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 A64871BBC for ; Fri, 17 Mar 2017 16:49:06 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: by mail-wr0-x241.google.com with SMTP id u48so10251764wrc.1 for ; Fri, 17 Mar 2017 09:49:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=date:from:to:subject:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=T7YvE9pxp6YbZgbMXUOfYOPuabHzHh+TLp9lT0dgqt4=; b=pElJ91AQc4TQhnWOVnKFEUYaZY/28X6H8WfXoFmZ3eUQ36dpzHAGt8QjhBWt3VJA9W US7bfyxl1ur5GPMDOHZyF2KGjLmcIKL+SMtQeLQdwmiXCz1WjuykjAeM759K9c6k/4WO ibT6jHBjnpybzDVy7uehb4WUfPx5+bIDkrNUeNbBSw2B5LbaMFiMlBZgoDMECC2CnaGl CqEca30IVEswLxQsW7/0cY8iUxY3A0za2KeKkk6JS/wzPQBEK1Ijo115+ysYjYIsQf7e 6BzINElTO+6UaQJisvC79Evsa9KMYKR0mAt0HuHU7TByQ4OWBX9/KfxCqJ4D+6Kvp84W GYoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=T7YvE9pxp6YbZgbMXUOfYOPuabHzHh+TLp9lT0dgqt4=; b=fcxMndpWmUlJsse4ox6LOPRaOihzehMrjP1rJmYyuqw11O+vfvfzDIbPnoMHGVmGYo I7f4afl6cV1atoD/dOcQPyKZplglpV7qmsb7sRwMfD66kLDlyBEdv4DTMbF18pDyg4rt KnP2U42tjU/hqfFI0FTqEtdN/kG/YOW1PIxbDvusY1gvgGghlaSN/dcwO6D/8xHhiVTT Pho6++y8zP3f5MysRutD+HuuzU+gClj9DMjjKkvwZbpC9wcJ6BmcpL7V2B2NysYVxxpv OYfKKBYa96ptqxZA5lTydjS+xVUvWBp5Bm7Juz9Td62laK9/HArDiEqbZKRR/ntoqtHr 5Qeg== X-Gm-Message-State: AFeK/H05aQioKhzUidu6NHjvBIDnT/EEhvox6T1lJSuUxgH6ge2oToaaxFNTsMzPnGS8sQ== X-Received: by 10.223.182.133 with SMTP id j5mr15559172wre.19.1489769343673; Fri, 17 Mar 2017 09:49:03 -0700 (PDT) Received: from gumby.homeunix.com ([81.17.24.158]) by smtp.gmail.com with ESMTPSA id i133sm3257920wmg.26.2017.03.17.09.49.01 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 17 Mar 2017 09:49:02 -0700 (PDT) Date: Fri, 17 Mar 2017 16:48:59 +0000 From: RW To: freebsd-questions@freebsd.org Subject: Re: bootable ext. USB SSD for backup Message-ID: <20170317164859.533e5834@gumby.homeunix.com> In-Reply-To: <20170316194612.GA1748@c720-r314251> References: <20170316194612.GA1748@c720-r314251> X-Mailer: Claws Mail 3.14.1 (GTK+ 2.24.29; amd64-portbld-freebsd10.3) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Mar 2017 16:49:07 -0000 On Thu, 16 Mar 2017 20:46:12 +0100 Matthias Apitz wrote: > Hello, > > I have acquired a small and flat USB 3.0 external disk (must be SSD > for the size of the case): > da0: 40.000MB/s transfers That looks like you're USB 2.0. If it really is an SSD it should be able to read at about 10 times that. > Ofc it has not the promised 1 TB volume, just only 953869 MB, i.e. > only 1 Marketing-TB; It's more of an engineering thing. The misuse of SI multipliers is an abomination that's usually been avoided, except where it's very convenient, and that's mainly for RAM. > I'm thinking in re-partitioning the disk (which is actual only one big > NTFS slice) with gpart(8), install even a kernel into a small FS at > the beginning and keep the rest as a big UFS for backups. Having it > bootable with a system could be handy if one has to rescue a system > and restore the last dunp. I wouldn't, you can run into annoying problems with the BIOS booting the wrong drive. You can make a bootable thumbdrive or live CD/DVD for emergencies.