Date: Mon, 13 Jun 2016 09:21:53 +0000 From: diversit.630.4@gmail.com To: freebsd-questions@freebsd.org Subject: =?UTF-8?B?6aG656Wd5ZWG6KSA77yB?= Message-ID: <001a1135615e4aef910535256b5e@google.com>
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[108.168.15.83]) by smtp.gmail.com with ESMTPSA id k101sm7591762ioi.9.2016.06.13.05.47.53 for <freebsd-questions@freebsd.org> (version=TLSv1/SSLv3 cipher=OTHER); Mon, 13 Jun 2016 05:47:53 -0700 (PDT) Subject: Re: ZFS: Is 'zpool add' really irreversible? To: freebsd-questions@freebsd.org References: <d13abf72-3903-796a-1d47-e3a7b776ebf8@rawbw.com> <86shwiax38.fsf@WorkBox.Home> <22e9b8aa-3171-f399-f3a8-b71eb92210f5@rawbw.com> <5022693a-b2e9-70d4-352b-121a116a0e20@FreeBSD.org> From: Jeremy Faulkner <gldisater@gmail.com> Message-ID: <3e2d24a8-edb6-0272-3248-dba2da6fa561@gmail.com> Date: Mon, 13 Jun 2016 08:47:52 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <5022693a-b2e9-70d4-352b-121a116a0e20@FreeBSD.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 13 Jun 2016 12:47:55 -0000 On 2016-06-12 6:50 PM, Matthew Seaman wrote: > On 12/06/2016 18:14, Yuri wrote: >> On 06/12/2016 14:58, Brandon J. Wandersee wrote: >>> `zpool add` adds*virtual* devices to a*pool*, while `zfs attach` adds >>> physical devices to a mirrored device. So individual disks can be added >>> to and removed from mirrored virtual devices, but virtual devices cannot >>> be removed from a pool. >> >> >> Thank you for your answer. I see that ZFS is designed this way. >> >> But I can't say I like this part of ZFS design. Because this isn't a >> physical disk with the set size, but a combination of disks. People may >> reasonably want to remove some disks in some layouts, due to failures, >> etc, and ZFS just lacks the flexibility to do that. > > You should have seen Matt Ahren's talk at BSDCan this year. (It might > be available on YouTube in the next few days -- depends if it was > livestreamed or not. Unfortunately, while there were lecture 4 tracks, > there was only one set of video kit to livestream with...) > > Suffice it to say though that there is already fix for those 'Oh No! I > really didn't mean to type "zfs add" there' moments in the upstream > OpenZFS repo, which will be coming to a FreeBSD repository near you Real > Soon Now. You get a grace period within which you can undo that sort of > mistake. > > Cheers, > > Matthew It appears that multiple days of videos got merged as there are talks from the devsummit merged with talks from day one of BSDCan. Here's Matt's talk: https://youtu.be/AOidjSS7Hsg?t=6h50m3s Jeremy Faulkner
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