From owner-freebsd-questions@freebsd.org Thu Sep 10 14:35:04 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id C775A3D904F for ; Thu, 10 Sep 2020 14:35:04 +0000 (UTC) (envelope-from c.brinkhaus@t-online.de) Received: from mailout07.t-online.de (mailout07.t-online.de [194.25.134.83]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mailout00.t-online.de", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BnLyH6RnNz45DX for ; Thu, 10 Sep 2020 14:35:03 +0000 (UTC) (envelope-from c.brinkhaus@t-online.de) Received: from fwd12.aul.t-online.de (fwd12.aul.t-online.de [172.20.26.241]) by mailout07.t-online.de (Postfix) with SMTP id B44CB420AB45; Thu, 10 Sep 2020 16:35:01 +0200 (CEST) Received: from esprimo.local (GiGmFkZFwhNMMIjjKEuHcHvhICdk1+cjdXYRL1FB1cK-BZxCV6VjDhjAAbaIWBaZN1@[93.238.32.241]) by fwd12.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1kGNf9-1P19Yu0; Thu, 10 Sep 2020 16:34:59 +0200 Received: by esprimo.local (Postfix, from userid 1001) id 5EA1E38258; Thu, 10 Sep 2020 16:34:58 +0200 (CEST) Date: Thu, 10 Sep 2020 16:34:58 +0200 From: Christoph Brinkhaus To: Ludovit Koren Cc: freebsd-questions@freebsd.org Subject: Re: ZFS snapshot - rollback problem Message-ID: <20200910143458.GA83264@esprimo> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ID: GiGmFkZFwhNMMIjjKEuHcHvhICdk1+cjdXYRL1FB1cK-BZxCV6VjDhjAAbaIWBaZN1 X-TOI-EXPURGATEID: 150726::1599748499-0000C495-E9255839/0/0 CLEAN NORMAL X-TOI-MSGID: 7505f72e-df1e-49bd-8d7b-cbf9017594ad X-Rspamd-Queue-Id: 4BnLyH6RnNz45DX X-Spamd-Bar: + Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of c.brinkhaus@t-online.de has no SPF policy when checking 194.25.134.83) smtp.mailfrom=c.brinkhaus@t-online.de X-Spamd-Result: default: False [1.89 / 15.00]; TO_DN_SOME(0.00)[]; FREEMAIL_FROM(0.00)[t-online.de]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_SHORT(-0.08)[-0.081]; RCPT_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_PBL(0.00)[93.238.32.241:received]; RCVD_TLS_LAST(0.00)[]; R_DKIM_NA(0.00)[]; FREEMAIL_ENVFROM(0.00)[t-online.de]; ASN(0.00)[asn:3320, ipnet:194.25.0.0/16, country:DE]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; SH_EMAIL_DBL_DONT_QUERY_IPS(0.00)[0.3.16.205:email]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[t-online.de]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.09)[0.091]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DBL_PROHIBIT(0.00)[0.3.16.205:email]; NEURAL_SPAM_LONG(0.48)[0.483]; RCVD_IN_DNSWL_NONE(0.00)[194.25.134.83:from]; R_SPF_NA(0.00)[no SPF record]; RWL_MAILSPIKE_POSSIBLE(0.00)[194.25.134.83:from]; MID_RHS_NOT_FQDN(0.50)[]; MAILMAN_DEST(0.00)[freebsd-questions] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Sep 2020 14:35:04 -0000 On Thu, Sep 10, 2020 at 04:18:39PM +0200, Ludovit Koren wrote: > Hi, > > I have the following configuration: > > ~>uname -a > FreeBSD XxX 11.3-STABLE FreeBSD 11.3-STABLE #1 r354607: Mon Nov 11 > 12:19:28 CET 2019 root@jedi:/usr/obj/usr/src/sys/HP amd64 > ~>zfs list > NAME USED AVAIL REFER MOUNTPOINT > zroot 244G 0 10.7G /mnt > zroot/Centos8 6.80G 4.13G 2.67G - > zroot/msw7 44.9G 25.8G 19.1G - > zroot/swapdisk0 40.8G 20.6G 20.2G - > zroot/usr 131G 0 50.9G /usr > zroot/usr/home 80.1G 0 80.1G /usr/home > zroot/var 9.94G 0 9.94G /var > > After zfs snapshot, which I did on the root, I got: > ~>zfs list -t snapshot > NAME USED AVAIL REFER MOUNTPOINT > zroot@200909 1K - 10.7G - > zroot/Centos8@200909 1K - 2.67G - > zroot/msw7@200909 1K - 19.1G - > zroot/swapdisk0@200909 0 - 20.2G - > zroot/usr@200909 1K - 50.9G - > zroot/usr/home@200909 1K - 80.1G - > zroot/var@200909 1K - 9.94G - > > i.e. whole filesystem is read only. I am not able to do neither > rollback, nor destroy of the snapshot. Is there any possibility to > reset the filesystem to the read-write mode? I do not see there if it is read only or not. To change the readyonly property: zfs set readonly=off Mount to make it effective: zfs mount -a > > Any help is greatly appreciated. I hope my notes are correct and help you. Kind regards, Christoph