From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Davis, Matthew" Date: Mon, 14 Jan 2019 22:44:13 +0000 Message-ID: References: <8fb5fa67-1b56-7baf-e8c9-b422c5c8b443@redhat.com> <29ace3ab-dbc7-ec32-867e-c3c875c79851@redhat.com> In-Reply-To: <29ace3ab-dbc7-ec32-867e-c3c875c79851@redhat.com> Content-Language: en-US MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [linux-lvm] how to copy a snapshot, or restore snapshot without deleting it Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" To: Zdenek Kabelac , LVM general discussion and development Hi Zdenek, `sudo lvs --version` says : LVM version: 2.02.180(2)-RHEL7 (2018-07-20) Library version: 1.02.149-RHEL7 (2018-07-20) Driver version: 4.37.1 So that means it's version 2, right? (I'm running the latest version of CentOS.) Regards, Matt -----Original Message----- From: Zdenek Kabelac [mailto:zkabelac@redhat.com] Sent: Thursday, 10 January 2019 8:45 PM To: LVM general discussion and development ; Davis, Matthew Subject: Re: how to copy a snapshot, or restore snapshot without deleting it Dne 10. 01. 19 v 7:23 Davis, Matthew napsal(a): > Hi Marian, > > I'm trying to do it with thin snapshots now. It's all very confusing, and I can't get it to work. > I've read a lot of the documentation about thin stuff, and it isn't clear what's happening. > > I took a snapshot with > > sudo lvcreate -s --name mySnap1 centos/root > > Then I copied that snapshot with > > sudo lvcreate -s --name mySnap2 centos/mySnap1 > > When I try to restore mySnap1 it says: > > $sudo lvconvert --merge centos/mySnap1 > centos/mySnap1 is not a mergeable logical volume > Hi Aren't you using some quite ancient version of lvm2 ? You need to use lvm2 which does support thin volume merging Regards Zdenek