About shrinking /home to retain space for another dualboot OS

Hi all,

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

Ubuntu 12.04 has been already installed on the HD first, several days ago, taking up the whole disc. Later I added/installed Fedora 17 selecting the "Shrink" option and saved 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

There is plenty of space on /home of Fedora 17. Is there any easy way to shrink /home of Fedora 17 and then adding the spare space to / (/dev/sda1) of Ubuntu 12.04? TIA

B.R.
satimis

Quote:

Is there any easy way to shrink /home of Fedora 17 and then adding the spare space to / (/dev/sda1)

Shrinking the Fedora /home partition, no problem. Adding it to could be a big problem. It depends upon which partition it is on. If you want to increase the size of sda1 with Ubuntu you would need to use sda2 and extend sda1 into space you resized from the beginning of sda2. You need to do this with contiguous partitions. You might create another partition just for Ubuntu /home but 4GB is probably too small for a / partition for Ubuntu. I've never used LVM so I don't really know how that would enter in to the problem.

Quote:

Originally Posted by yancek

Shrinking the Fedora /home partition, no problem. Adding it to could be a big problem. It depends upon which partition it is on. If you want to increase the size of sda1 with Ubuntu you would need to use sda2 and extend sda1 into space you resized from the beginning of sda2. You need to do this with contiguous partitions. You might create another partition just for Ubuntu /home but 4GB is probably too small for a / partition for Ubuntu. I've never used LVM so I don't really know how that would enter in to the problem.

Hi and all,

Thanks for your reply.

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.

Today I installed Fedora 17 on the freed space by shrinking Ubuntu 12.04 which was taking up the entire HD. Installation went through w/o much problem. Unfortunately I made a mistake on calculating the shrinked space to be retained by Ubuntu 12.04.

The target on this rectification is mainly for me to learn. 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 document be relevant to 1) above?

9.5. Using the LVM utility system-config-lvm
http://www.centos.org/docs/5/html/De...onfig-lvm.html

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

Thanks.

Edit:

I also found;

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

B.R.
satimis

I don't know. Haven't used LVM but if this is just test systems, go for it. The problem is that data is usually at the beginning of a partition so if you move a partition from the left to the right (say sda2) to give sda1 (Ubuntu) more room, what happens to the data?

Hi all,

I followed;
How to Shrink an LVM Volume Safely
How to Shrink an LVM Volume Safely | Random Bits

to shrink /home of Fedora 17 from 78G to 10G to free 68G space with following steps:-

Booted up the PC with Fedora 17 live USB

# vgchange -a y

Code:

3 logical volume(s) in volume group "vg_fedora17" now active

# resize2fs -f /dev/mapper/vg_fedora17-lv_home

Code:

resize2fs 1.42 (29-Nov-2011) The filesystem is already 20258816 blocks long. Nothing to do!

# e2fsck -f /dev/mapper/vg_fedora17-lv_home

Code:

e2fsck 1.42 (29-Nov-2011) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/mapper/vg_fedora17-lv_home: 477/5070848 files (5.9% non-contiguous), 383520/20258816 blocks

# resize2fs /dev/mapper/vg_fedora17-lv_home 9G

Code:

resize2fs 1.42 (29-Nov-2011) Resizing the filesystem on /dev/mapper/vg_fedora17-lv_home to 2359296 (4k) blocks. The filesystem on /dev/mapper/vg_fedora17-lv_home is now 2359296 blocks long.

# lvreduce -L 10G /dev/vg_fedora17/lv_home

Code:

WARNING: Reducing active logical volume to 10.00 GiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce lv_home? [y/n]: y Reducing logical volume lv_home to 10.00 GiB Logical volume lv_home successfully resized

# fdisk -l

Code:

Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000d52d Device Boot Start End Blocks Id System /dev/sda1 * 2048 8263679 4130816 83 Linux /dev/sda2 296333310 312580095 8123393 5 Extended /dev/sda3 8263680 9287679 512000 83 Linux /dev/sda4 9287680 296331263 143521792 8e Linux LVM /dev/sda5 296333312 312580095 8123392 82 Linux swap / Solaris Partition table entries are not in disk order Disk /dev/mapper/vg_fedora17-lv_swap: 10.3 GB, 10267656192 bytes 255 heads, 63 sectors/track, 1248 cylinders, total 20054016 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/vg_fedora17-lv_home: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/vg_fedora17-lv_root: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders, total 104857600 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 4111 MB, 4111466496 bytes 255 heads, 63 sectors/track, 499 cylinders, total 8030208 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1d459011 Device Boot Start End Blocks Id System /dev/sdb1 * 0 1320959 660480 0 Empty /dev/sdb2 164 1299 568 ef EFI (FAT-12/16/32) /dev/sdb3 1348 3587 1120 0 Empty WARNING: GPT (GUID Partition Table) detected on '/dev/sdb1'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb1: 676 MB, 676331520 bytes 255 heads, 63 sectors/track, 82 cylinders, total 1320960 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1d459011 Device Boot Start End Blocks Id System /dev/sdb1p1 * 0 1320959 660480 0 Empty /dev/sdb1p2 164 1299 568 ef EFI (FAT-12/16/32) /dev/sdb1p3 1348 3587 1120 0 Empty Disk /dev/mapper/live-rw: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/live-osimg-min: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

Rebooted PC to start Fedora 17

# fdisk -l

Code:

Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000d52d Device Boot Start End Blocks Id System /dev/sda1 * 2048 8263679 4130816 83 Linux /dev/sda2 296333310 312580095 8123393 5 Extended /dev/sda3 8263680 9287679 512000 83 Linux /dev/sda4 9287680 296331263 143521792 8e Linux LVM /dev/sda5 296333312 312580095 8123392 82 Linux swap / Solaris Partition table entries are not in disk order Disk /dev/mapper/vg_fedora17-lv_swap: 10.3 GB, 10267656192 bytes 255 heads, 63 sectors/track, 1248 cylinders, total 20054016 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/vg_fedora17-lv_home: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/vg_fedora17-lv_root: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders, total 104857600 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 4111 MB, 4111466496 bytes 255 heads, 63 sectors/track, 499 cylinders, total 8030208 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1d459011 Device Boot Start End Blocks Id System /dev/sdb1 * 0 1320959 660480 0 Empty /dev/sdb2 164 1299 568 ef EFI (FAT-12/16/32) /dev/sdb3 1348 3587 1120 0 Empty WARNING: GPT (GUID Partition Table) detected on '/dev/sdb1'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb1: 676 MB, 676331520 bytes 255 heads, 63 sectors/track, 82 cylinders, total 1320960 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1d459011 Device Boot Start End Blocks Id System /dev/sdb1p1 * 0 1320959 660480 0 Empty /dev/sdb1p2 164 1299 568 ef EFI (FAT-12/16/32) /dev/sdb1p3 1348 3587 1120 0 Empty Disk /dev/mapper/live-rw: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/live-osimg-min: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

$ df -h

Code:

Filesystem Size Used Avail Use% Mounted on rootfs 50G 2.8G 46G 6% / devtmpfs 3.8G 0 3.8G 0% /dev tmpfs 3.8G 96K 3.8G 1% /dev/shm tmpfs 3.8G 1.1M 3.8G 1% /run /dev/mapper/vg_fedora17-lv_root 50G 2.8G 46G 6% / tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup tmpfs 3.8G 0 3.8G 0% /media /dev/sda3 485M 72M 389M 16% /boot /dev/mapper/vg_fedora17-lv_home 8.9G 235M 8.2G 3% /home

Gparted is NOT running on Fedora 17 live USB.

I have no solution to resize Ubuntu 12.04 / adding the free space. Neither I found a thread relevant.

Any advice. TIA

B.R.
satimis