Date: Fri, 16 Dec 2005 12:05:01 -0800 From: Lapo Nustrini <lapo@seanet.com> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: freebsd-geom@freebsd.org Subject: Re: gconcat Message-ID: <0A47F650-AEDC-439D-B5D7-B3FA7C410DB1@seanet.com> In-Reply-To: <20051216163217.GC14985@garage.freebsd.pl> References: <8B452D98-4FD5-4755-AB7F-31D278DF33F7@seanet.com> <20051216021759.GA14087@garage.freebsd.pl> <52A581CA-EC39-4C83-8C77-CB373F68D3FB@seanet.com> <20051216163217.GC14985@garage.freebsd.pl>
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On Dec 16, 2005, at 8:32 AM, Pawel Jakub Dawidek wrote: > On Fri, Dec 16, 2005 at 08:10:51AM -0800, Lapo Nustrini wrote: > +> > +> On Dec 15, 2005, at 6:17 PM, Pawel Jakub Dawidek wrote: > +> > +> >On Thu, Dec 15, 2005 at 04:06:08PM -0800, Lapo Nustrini wrote: > +> >+> > +> >+> Can anyone tell me whether it is possible to expand a > gconcat volume (by adding a drive to the end of it) without having > to wipe the data from the existing set and recreate from scratch? > +> >+> I don't mind having to manually edit bsdlabels and such. > Just wondering if its possible at all. > +> >+> I've been looking for some docs on this but can't seem to > find a definitive answer. > +> > > +> >It should just work be relabeling providers. > +> >If you did something like: > +> > > +> > # gconcat label foo da0 da1 > +> > > +> >You can expand it with: > +> > > +> > # gconcat label foo da0 da1 da2 da3 > +> > > +> >etc. Just be sure the order of old providers is the same. > +> > > +> >PS. You'd need to stop device 'foo' first. > +> > > +> > +> This is what I tried: > +> > +> # mount /dev/concat/gc0 /mnt > +> # cp -pr ttt /mnt > +> # ls -la /mnt > +> total 8 > +> drwxr-xr-x 4 root wheel 512 Dec 16 07:49 . > +> drwxr-xr-x 25 root wheel 1024 Dec 15 15:02 .. > +> drwxrwxr-x 2 root operator 512 Dec 16 07:48 .snap > +> drwxr-xr-x 2 lapo wheel 512 Nov 9 22:48 ttt > +> # umount /mnt > +> # gconcat stop gc0 > +> # gconcat label gc0 ad1 ad3 ad4 ad6 ad7 > +> # mount /dev/concat/gc0 /mnt > +> # ls -la /mnt > +> ls: ttt: Bad file descriptor > +> total 6 > +> drwxr-xr-x 4 root wheel 512 Dec 16 07:49 . > +> drwxr-xr-x 25 root wheel 1024 Dec 15 15:02 .. > +> drwxrwxr-x 2 root operator 512 Dec 16 07:48 .snap > +> > +> Am I missing a step? > +> Thanks! > > Are you sure you gave correct order? It works here just fine... > What was the previous 'gconcat label' command you gave? > I was thought the previous command was, "#gconcat label gc0 ad1 ad3 ad4" However, to make sure I tried this again and it does indeed appear to work. I do have a further question. If I create a new volume with: #gconcat label gc0 ad1 ad3 Then place a file system on it: #newfs -U /dev/concat/gc0 And mount it, the output from "df" will be: /dev/concat/gc0 15135708 4 13924848 0% /mnt If I then umount and stop the gconcat volume, add aother drive to it with: #gconcat label gc0 ad1 ad3 ad5 I can't run newfs on it or I will lose any data, but the output of "df" will still only show: /dev/concat/gc0 15135708 4 13924848 0% /mnt Is there a way to tell the system the drive is now bigger? Should I be using bsdlabel / fdisk at some point? Thanks again, Lapo Nustrini
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