From owner-freebsd-current@FreeBSD.ORG Tue Dec 22 19:19:21 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E43231065695 for ; Tue, 22 Dec 2009 19:19:21 +0000 (UTC) (envelope-from swhetzel@gmail.com) Received: from mail-iw0-f198.google.com (mail-iw0-f198.google.com [209.85.223.198]) by mx1.freebsd.org (Postfix) with ESMTP id A8E6E8FC14 for ; Tue, 22 Dec 2009 19:19:21 +0000 (UTC) Received: by iwn36 with SMTP id 36so4485830iwn.3 for ; Tue, 22 Dec 2009 11:19:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=ic2tPVuEyzXtbNjVt9CQ658mbHRa8cJ5OI0p0ertnvI=; b=ChKpG1PEEXZhslwAs5T1q/Xm4d7rdSwg50YUxnd4E6ikDBSoJ/j2mHofwP1AoNJWGF uvYYje+QvmQtuGUxLl7XXRoLAesqoV5TVlmu5uEUbhTlquZZA+aziwnIbADkyh31pk/8 k4r3dz/NXNyIoaH4d/efVA3y7qKQ60CdWyKfw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=VaclcvmIcItNwhPU866sPp3zkrujBTElUoN6eeiLTtgCCGi7VpeXLduIAmhPOSN5w2 uKNQMDz3BHEbo6D/3mTSv3ITEUAgfbbq+IjDStKWwI5KivWxAX1+syTd8OqkyOaDOdM+ kM6Kz7l1sSoSr/4vB8V8GHpNDh6xJ4n8Zhxnc= MIME-Version: 1.0 Received: by 10.231.170.136 with SMTP id d8mr1854495ibz.17.1261509560912; Tue, 22 Dec 2009 11:19:20 -0800 (PST) In-Reply-To: References: <200912210600.46044.mel.flynn+fbsd.current@mailing.thruhere.net> <790a9fff0912211047w6e0ee46co420869f25a7a016d@mail.gmail.com> <4B30D75D.6010708@icyb.net.ua> Date: Tue, 22 Dec 2009 13:19:20 -0600 Message-ID: <790a9fff0912221119ve4ab385me528ffd8ab1b50b8@mail.gmail.com> From: Scot Hetzel To: krad Content-Type: text/plain; charset=ISO-8859-1 Cc: Mel Flynn , freebsd-current@freebsd.org, Andriy Gapon Subject: Re: Some notes on RootOnZFS article in wiki X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Dec 2009 19:19:22 -0000 On 12/22/09, krad wrote: > > > 2009/12/22 Andriy Gapon > > > on 22/12/2009 13:02 krad said the following: > > > > > > > > Are there still issues with using zvols for swap? If not you don't need > a > > > slice for swap and can get rid of gmirror entirely. > > > > Is this supported at all _on FreeBSD_? > > Even, if yes, one drawback is that you wouldn't be able to use zvol swap > as a dump > > device. > > > > > > -- > > Andriy Gapon > > > > Even is you use a dedicated zvol for crashdump only? > Opensolaris uses a seperate zvol for crash dumps, so I gave it a try and created a zvol. zfs create -V 8G zroot/dump zfs set checksum=off zroot/dump But when dumpon executes, it tells you that dumps are not supported to zfs zvolumes. dv8t01# dumpon /dev/zvol/zroot/dump dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported Scot