From owner-freebsd-questions@freebsd.org Tue Dec 11 20:02:46 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 62F4413122CC for ; Tue, 11 Dec 2018 20:02:46 +0000 (UTC) (envelope-from rcarter@pinyon.org) Received: from h2.pinyon.org (h2.pinyon.org [65.101.20.170]) (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 396E26ACB4 for ; Tue, 11 Dec 2018 20:02:45 +0000 (UTC) (envelope-from rcarter@pinyon.org) Received: by h2.pinyon.org (Postfix, from userid 58) id 5BBCD125CA; Tue, 11 Dec 2018 13:02:40 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=pinyon.org; s=DKIM; t=1544558560; bh=RxyWZdw0foICNi9rhfUPJY4dVlIfDhrYJBNMBYuUEEg=; h=Subject:To:References:From:Date:In-Reply-To; b=pIMTTMTQ9KkTT7gKHs02ULYjOlNqG/bc/7kNguugWSHmRz83CBLpaBT44eTnO9bgD Uy5qismRPD6749jDw9STX86p75HP1Yq8Y+pgBB2TPXwX1owpfdZzJdH7MGGwzHAqG+ fyVHUl/czuQYBIYjak7KwxnWpXAbpkWEpIP8LkTA= X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on h2.n1.pinyon.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,URIBL_BLOCKED shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from [10.0.10.15] (h1.pinyon.org [65.101.20.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by h2.pinyon.org (Postfix) with ESMTPSA id 56AC9125BE for ; Tue, 11 Dec 2018 13:02:39 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=pinyon.org; s=DKIM; t=1544558559; bh=RxyWZdw0foICNi9rhfUPJY4dVlIfDhrYJBNMBYuUEEg=; h=Subject:To:References:From:Date:In-Reply-To; b=FGz6JHOLGSDdDHmnIo4y9cjT3qKWwXqBdXksAfqvAeVUh7j2HCvjrngI5mOGzzV7Q f9W0PHfB0xCaRj7UGfW4nU+kRMd6sG3Be+/e8VKnlpkWD/AN2SoNoPVpUu0bBlq+9z B9bgTfASF9BnhoxfsmgjXG6iqIRQvxnaxOw+zhPQ= Subject: Re: HOWTO safely unmount remove USB zfs sdcard To: freebsd-questions@freebsd.org References: From: "Russell L. Carter" Message-ID: <73851532-e5d3-50f2-0553-71369348d38d@pinyon.org> Date: Tue, 11 Dec 2018 13:02:36 -0700 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 396E26ACB4 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=pinyon.org header.s=DKIM header.b=pIMTTMTQ; dkim=pass header.d=pinyon.org header.s=DKIM header.b=FGz6JHOL; spf=pass (mx1.freebsd.org: domain of rcarter@pinyon.org designates 65.101.20.170 as permitted sender) smtp.mailfrom=rcarter@pinyon.org X-Spamd-Result: default: False [-2.50 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[pinyon.org:s=DKIM]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[3]; DMARC_NA(0.00)[pinyon.org]; DKIM_TRACE(0.00)[pinyon.org:+]; MX_GOOD(-0.01)[h2.pinyon.org,h1.pinyon.org]; NEURAL_HAM_SHORT(-0.95)[-0.953,0]; IP_SCORE(-1.04)[ipnet: 65.100.0.0/14(-4.93), asn: 209(-0.16), country: US(-0.09)]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:209, ipnet:65.100.0.0/14, country:US]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Dec 2018 20:02:46 -0000 On 12/11/18 11:37 AM, Michael Sierchio wrote: > I've been holding back, but - why? Why abuse an SD card that way? My > back-of-the-envelope estimate is that it halves the life of the card. A) Rescue a system. B) Refamiliarize myself with bringing up zfs pools and datasets. C) I have dozens of sdcards. It's been 12 months since I even touched one. D) Not least, learn how to attach/detach physical zfs drives. To really grasp the awfulness of my crime, consider that I only put about 100MB on a 64GB (nominal) sdcard. It's now back on the pile. I will try to empathize with my sdcard population more, I promise :-) Cheers, Russell > - M > > On Sun, Dec 9, 2018 at 4:12 PM Russell L. Carter wrote: > >> Greetings, >> I can easily create a ZFS filesystem on a USB sdcard, >> but I have not yet found the recipe for safely unmounting >> it and then mounting it on another 12.0 FreeBSD system. > >