From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id j887EbV03175 for ; Thu, 8 Sep 2005 03:14:37 -0400 Received: from percy.comedia.it (percy.comedia.it [212.97.59.71]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id j887EUbo003742 for ; Thu, 8 Sep 2005 03:14:31 -0400 Date: Thu, 8 Sep 2005 09:14:23 +0200 From: Luca Berra Subject: Re: [linux-lvm] VGDA Question Message-ID: <20050908071423.GC21002@percy.comedia.it> References: <20050907144600.42410.qmail@web52915.mail.yahoo.com> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <20050907144600.42410.qmail@web52915.mail.yahoo.com> 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"; format="flowed" Content-Transfer-Encoding: 7bit To: linux-lvm@redhat.com On Wed, Sep 07, 2005 at 07:46:00AM -0700, Rik Herrin wrote: >Hi, > According to the LVM man page, the VGDA (Volume Group >Descriptor Area) holds the metadata responsible for >keeping information about the LVs. However, it is >contained in the PVs. Why does the VGDA contain both >LV descriptors and PE descriptors? Shouldn't it just >have PE descriptors and leave the LV descriptors to i tried, but fail to understand your question. The VGDA is the only place on disk where information necessary for activation of the volume group and contained logical volume can be stored permanetly. >the volume group? Also, when booting, what makes the >kernel know that there are VGs and LVs? Does it look The kernel doesn't. lvm is setup by user space tools. >Finally, where exactly is the VGDA information held?. >Thanks for your time. at the beginning of the PV regatds -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \