Resizing a logical volume

The CentOS installer had created a single 250 GB /home partition on a 320 GB drive, but I wanted to split this into a 150 GB /home and a 100 GB /data partition.

The steps to shrink the /home partition (as root)(my hostname is legion):

• umount /home
• fsck -f /home
• resize2fs -p /dev/vg_legion/lv_home 150G
• lvresize -L -50G /dev/vg_legion/lv_home
• mount /home

Next, to create the /data partition:

• lvcreate -n lv_data -L 100G vg_legion
• mke2fs -j /dev/vg_legion/lv_data
• mkdir /data
• mount /dev/vg_legion/lv_data /data
• Add an approriate lines to your /etc/fstab:
  /dev/mapper/vg_legion-lv_data /data ext4 defaults 1 2