From owner-freebsd-bugs@freebsd.org Tue May 26 12:13:17 2020 Return-Path: Delivered-To: freebsd-bugs@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 6D3842FC171 for ; Tue, 26 May 2020 12:13:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 49WXt52FzQz43tx for ; Tue, 26 May 2020 12:13:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 4D45C2FBF71; Tue, 26 May 2020 12:13:17 +0000 (UTC) Delivered-To: bugs@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 4CD142FBF70 for ; Tue, 26 May 2020 12:13:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49WXt51RDmz43bZ for ; Tue, 26 May 2020 12:13:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 255C8235BF for ; Tue, 26 May 2020 12:13:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 04QCDHiY011423 for ; Tue, 26 May 2020 12:13:17 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 04QCDH8N011421 for bugs@FreeBSD.org; Tue, 26 May 2020 12:13:17 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 246750] ZFS: Confusing error message when creating ZFS pool on vdev Date: Tue, 26 May 2020 12:13:16 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kwiat3k@panic.pl X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 May 2020 12:13:17 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246750 Bug ID: 246750 Summary: ZFS: Confusing error message when creating ZFS pool on vdev Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: kwiat3k@panic.pl On default FreeBSD configuration (vfs.zfs.vol.recursive =3D=3D 0) it's impo= ssible to create ZFS pools on vdevs. When users try to do this they see generic and confusing error message: ``` # zfs create -V 1G -s zroot/kwiat # zpool create -f kwiat /dev/zvol/zroot/kwiat cannot create 'kwiat': no such pool or dataset ``` For someone not experienced in ZFS it will take some time to learn how to workaround this as it seems it's not documented anywhere. What's more, on L= inux it just works. My ideas how to improve this: 1) Better error message when vfs.zfs.vol.recursive=3D=3D0 and backing devic= e is zvol. Example: "cannot create 'kwiat': creating pool on zvol is dangerous. See man zpool(8) for more info." 2) Document it in the zpool(8) manpage in "zpool create" section --=20 You are receiving this mail because: You are the assignee for the bug.=