Thanks for the advice Jess. Actually I am to blame for this. I did not properly understand the LVM concept before doing this partitioning. I have lots of free space on disk but that is *outside* the VG. Only later did I realize that the whole point of having VGs is to have some free space *within* them! On Tue, Jan 17, 2012 at 8:06 PM, Males, Jess <jmales@cio.sc.gov> wrote: > Log in as root: > > - either once the system is completely booted, log in as root > with the graphical prompt > > - boot into single user mode. i.e. stop grub in its countdown, > edit the boot configuration by appending single to the list of kernel > parameters > > > > Or, boot with a live CD/USB environment. > > > > I would recommend this last option. Depending on the live environment, you > might have to manually detect the volume group, but you’re outside the > installed system so you can change any logical volume without worry or > conflict. > > > > I would suggest the real lesson from all of this is: unless space > constrained, never commit 100% of your vg. The whole point of abstracting > your disk into lvm is for flexibility, and how can you have flexibility > without a little spare disk to apportion later? I say this because you > sound ready to slice X GB off lvhome and immediately commit it all to other > logical volumes; keep some as spare. > > > > > > -- Jess Males > > > > From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On > Behalf Of Kiran Rao > Sent: Monday, January 16, 2012 8:07 AM > To: linux-lvm@redhat.com > Subject: Resizing a logical volume which is mounted (at /home) > > > > To start off, here's an overview of my configuration. I'm dual-booting > Windows XP and Fedora Core 16. When I installed FC 16, here's how I created > the partitions: > > 1) Volume Group (vg_me) - ~73 GB > > Out of this, the following are the logical volumes: > a) lvhome (mount point - /home) - ~48GB > b) lvroot (mount point - /) ~10GB > c) lvvar (mount point - /var) ~15GB > > So, there's no free space left on the volume group. > > Now, I feel the 48GB is not really necessary for the /home. I want to > redistribute the space among the 3 logical volumes within this VG, or create > a new one (/tech). In either case, I want to take the additional space > (around 20GB) from lvhome and give it to either / or to /tech. > > Now, I tried the GUI (system-config-lvm) tool to do this. I can click on > lvhome and try to resize it. However, the problem is that since I am logged > in as a non-root user, the /home is mounted. Resizing requires one to > unmount it, but the unmount operation fails since I am mounted. > > How do I work around this? > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
