From nobody Fri Mar 25 13:33:54 2022 X-Original-To: freebsd-fs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id A4BFB1A24FE9 for ; Fri, 25 Mar 2022 13:34:22 +0000 (UTC) (envelope-from bsdlists@jld3.net) Received: from mail.jld3.net (mail.jld3.net [45.55.236.93]) (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 4KQ33K37K1z3HZH for ; Fri, 25 Mar 2022 13:34:21 +0000 (UTC) (envelope-from bsdlists@jld3.net) Received: from localhost (localhost [127.0.0.1]) by mail.jld3.net (Postfix) with ESMTP id B2043415F2 for ; Fri, 25 Mar 2022 07:34:20 -0600 (MDT) X-Virus-Scanned: amavisd-new at jld3.net Received: from mail.jld3.net ([127.0.0.1]) by localhost (mail.jld3.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 8OkxdJFpz0qZ for ; Fri, 25 Mar 2022 07:34:20 -0600 (MDT) Received: from [169.254.207.51] (c-24-9-144-115.hsd1.co.comcast.net [24.9.144.115]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: jld) by mail.jld3.net (Postfix) with ESMTPSA id B264F40615 for ; Fri, 25 Mar 2022 07:34:19 -0600 (MDT) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.jld3.net B264F40615 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.jld3.net B264F40615 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jld3.net; s=8d052f02dde2; t=1648215259; bh=u1HuEijYQXYjTSyJONQ9lTsxJYp02ng7rjIGd0b82hw=; h=From:To:Subject:Date:Message-ID:MIME-Version:From; b=ywW+Rojn2U/lPHblzIUTzm2tGnP2SKOqHLJzsYx1O2CwJ8A/Um1HjfWZAMswvS95s krjY/3kxxn0V6GuuBTARJTHb1r05+mos5n+Y4uL2V11EJGifvyZ70ghXz7kwRBY7L+ WeQkGqfjoXy7ZHUWFwKLwtxrOX0Y7+LAsZneddrM= From: "John Doherty" To: freebsd-fs@freebsd.org Subject: create zpool from zvols? Date: Fri, 25 Mar 2022 07:33:54 -0600 X-Mailer: MailMate (1.13.2r5673) Message-ID: <72AA1AC8-E623-4B73-A3F3-3FDB0ABDFCEA@jld3.net> List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; format=flowed X-Rspamd-Queue-Id: 4KQ33K37K1z3HZH X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=jld3.net header.s=8d052f02dde2 header.b=ywW+Rojn; dmarc=pass (policy=quarantine) header.from=jld3.net; spf=pass (mx1.freebsd.org: domain of bsdlists@jld3.net designates 45.55.236.93 as permitted sender) smtp.mailfrom=bsdlists@jld3.net X-Spamd-Result: default: False [-3.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[jld3.net:s=8d052f02dde2]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:45.55.236.93]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCVD_COUNT_THREE(0.00)[4]; DKIM_TRACE(0.00)[jld3.net:+]; DMARC_POLICY_ALLOW(-0.50)[jld3.net,quarantine]; NEURAL_HAM_SHORT(-1.00)[-1.000]; MLMMJ_DEST(0.00)[freebsd-fs]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:14061, ipnet:45.55.192.0/18, country:US]; RCVD_TLS_LAST(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[24.9.144.115:received] X-ThisMailContainsUnwantedMimeParts: N Hello, I am using ZFS on FreeBSD 13.0-RELEASE-p8. For experimentation and demonstration, I would like to create zpools using zvols as the underlying block devices. For example, I have these: [root@ibex] # zfs list -r -t volume zroot | grep zv zroot/zv0 8.25G 832G 56K - zroot/zv1 8.25G 832G 56K - This seems as if it would do what I want: [root@ibex] # zpool create -n ztest mirror /dev/zvol/zroot/zv{0,1} would create 'ztest' with the following layout: ztest mirror zvol/zroot/zv0 zvol/zroot/zv1 But when I try to actually do it, it doesn't work: [root@ibex] # zpool create ztest mirror /dev/zvol/zroot/zv{0,1} cannot create 'ztest': no such pool or dataset FWIW, doing something similar on OmniOS works fine: [root@orca] # uname -srvp SunOS 5.11 omnios-r151040-852962cae3 i386 [root@orca] # zfs create -V 2G rpool/zv0 [root@orca] # zfs create -V 2G rpool/zv1 [root@orca] # zpool create ztest mirror /dev/zvol/dsk/rpool/zv{0,1} [root@orca] # zpool status ztest pool: ztest state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM ztest ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 /dev/zvol/dsk/rpool/zv0 ONLINE 0 0 0 /dev/zvol/dsk/rpool/zv1 ONLINE 0 0 0 errors: No known data errors I thought I had done this in the past. Am I doing something wrong? Am I misremembering and this never worked? Using files created with truncate(1) rather zvols seems to work fine so maybe that's what I did before. Not sure, it's been a long time since I wanted to do something like this. Thanks for any enlightenment.