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Full Discussion: About shrinking LVM and then adding the freed space to another OS on dualboot system
Operating Systems Linux About shrinking LVM and then adding the freed space to another OS on dualboot system Post 302690111 by satimis on Wednesday 22nd of August 2012 12:55:06 PM
Old 08-22-2012
About shrinking LVM and then adding the freed space to another OS on dualboot system
Hi all,

Fedora 17, 64bit
Ubuntu 12.04 desktop 64bit
HD 160G

I installed Ubuntu 12.04 on the HD first taking up the whole disc. Later I added/installed Fedora 17 selecting the "Shrink" option and save the bootloader on /dev/sda1 to make them dualboot. Installation is successful with dulaboot option. Unfortunately by mistake I retained insufficient space for Ubuntu 12.04 now only about 100M left when it is up.


Ubuntu 12.04
$ df -h
Code:
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       4.0G  3.7G  107M  98% /
udev            3.8G  4.0K  3.8G   1% /dev
tmpfs           1.6G  880K  1.6G   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            3.8G  156K  3.8G   1% /run/shm


Fedora 17
$ df -h
Code:
Filesystem                       Size  Used Avail Use% Mounted on
rootfs                            50G  4.0G   46G   9% /
devtmpfs                         3.8G     0  3.8G   0% /dev
tmpfs                            3.8G  100K  3.8G   1% /dev/shm
tmpfs                            3.8G  1.9M  3.8G   1% /run
/dev/mapper/vg_fedora17-lv_root   50G  4.0G   46G   9% /
tmpfs                            3.8G     0  3.8G   0% /sys/fs/cgroup
tmpfs                            3.8G     0  3.8G   0% /media
/dev/sda3                        497M   60M  413M  13% /boot
/dev/mapper/vg_fedora17-lv_home   78G  1.4G   72G   2% /home

I'm now trying to find a not-too-complicate way shrinking /home of Fedora 17 and then adding the freed space to / of Ubuntu 12.04.

This is a spare HD NOT for production. I'll use it testing Cloud running on Fedora 17 and Ubuntu 12.04 respectively. There is not much data nor much work done on both OS. The only work I did several day before was installing rotation desktop on Ubuntu 12.04. It is now working.


I think I have to split the job into 2 sections

1)
Shrinking Fedora lv_home

2)
Adding the freed space to Ubuntu /


Would following documents be relevant to 1) above?

9.5. Using the LVM utility system-config-lvm
9.5.*Using the LVM utility system-config-lvm

Linux LVM: Resizing partitions.
http://www.microdevsys.com/WordPress...ng-partitions/


I'm still hunting around for documents to be used for 2) above.

Thanks.


B.R.
satimis
 

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LEARN ABOUT SUSE

pvresize

PVRESIZE(8)						      System Manager's Manual						       PVRESIZE(8)

NAME

       pvresize - resize a disk or partition in use by LVM2

SYNOPSIS

       pvresize [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--setphysicalvolumesizesize] PhysicalVolume [PhysicalVolume...]

DESCRIPTION

       pvresize resizes PhysicalVolume which may already be in a volume group and have active logical volumes allocated on it.

OPTIONS

       See lvm(8) for common options.

       --setphysicalvolumesize size
	      Overrides the automatically-detected size of the PV.  Use with care, or prior to reducing the physical size of the device.

EXAMPLES

       Expand the PV on /dev/sda1 after enlarging the partition with fdisk:

       pvresize /dev/sda1

       Shrink the PV on /dev/sda1 prior to shrinking the partition with fdisk (ensure that the PV size is appropriate for your intended new parti-
       tion size):

       pvresize --setphysicalvolumesize 40G /dev/sda1

RESTRICTIONS

       pvresize will refuse to shrink PhysicalVolume if it has allocated extents after where its new end would be. In the future, it should  relo-
       cate these elsewhere in the volume group if there is sufficient free space, like pvmove does.

       pvresize won't currently work correctly on LVM1 volumes or PVs with extra metadata areas.

SEE ALSO

       lvm(8), pvmove(8), lvresize(8), fdisk(8)

Sistina Software UK					 LVM TOOLS 2.02.67(2) (2010-06-04)					       PVRESIZE(8)
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