Date: Sat, 13 May 2006 21:12:36 +0100 From: bob@skq.ath.cx To: freebsd-sparc64@freebsd.org Subject: Re: gvinum root Message-ID: <20060513201235.GA3719@snot.privnet> In-Reply-To: <20060513193956.44b26835@snot.privnet> References: <20060513193956.44b26835@snot.privnet>
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On Sat, May 13, 2006 at 07:39:56PM +0100, Andrew Basterfield wrote: > Hi > > I want to move to mirrored root using gvinum on 6.1-RELEASE/sparc64. > First I need to build my setup on my second disk da1 > > I have tried using da1c as my gvinum drive but I found gvinum trod on > my disklabel, so now I have slice 'h' for gvinum that skips cylinder 0 > and I use VTOC compatible disklabel so I can have overlapping > slices. > > [bob@spoogle ~]$ sudo disklabel da1 > # /dev/da1: > text: FreeBSD8G cyl 4924 alt 2 hd 27 sec 133 > bytes/sector: 512 > sectors/cylinder: 3591 > sectors/unit: 17682084 > > 8 partitions: > # > # Size is in sectors. > # Offset is in cylinders. > # size offset tag flag > # ---------- ---------- ---------- ---- > a: 1052163 2 root wm > c: 17682084 0 backup wu > h: 17678493 1 unassigned wu > > The root filesystem needs to begin at the start of cylinder 2 so I > have an driveoffset that should consume all of the space in cylinder 1 > minus 265 sectors for the gvinum config. > > 3591 sec/track - 265 = 3326 sectors offset > > gvinum config: > > #drive disk0 device /dev/da0h > drive disk1 device /dev/da1h > > volume root > #plex org concat > #sd length 512m driveoffset 3326s drive disk0 > plex org concat > sd length 512m driveoffset 3326s drive disk1 > > Now I don't understand why /dev/gvinum/root and /dev/da1a don't point to > the same disk area? > > This is what I am trying to follow > > http://216.239.59.104/search?q=cache:rrHJabrK314J:list.droso.net/9/60876+freebsd+vinum+offset+sparc64&hl=en&gl=uk&ct=clnk&cd=4 The driveoffset value includes the gvinum setup I just needed to set driveoffset to 3591s (1 cyl) --Andrew
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