How to extend disk space of an existing file system in LVM, or How to configure LVM or create new volume group from command line, or Understand the maximum volume group size limitation.
How to create new Linux EXT3 file system in LVM with new hard disk by creating new logical volume?
Assuming a new IDE hard disk hooked up to Secondary-Slave IDE bus for the new logical volume / file system. Hence, the Linux device code will be /dev/hdd for this IDE hard disk, according to LANANA Linux Device List or the offline copy in /usr/src/linux-2.x/Documentation/devices.txt
1. Using the whole secondary-slave IDE hard disk for existing LVM volume group (called vg0 in my case) by creating the physical volume (PV):
pvcreate /dev/hdd
A similar message of this will be shown upon successful execution of pvcreate command:
pvcreate — physical volume “/dev/hdd” successfully created
2. Adding the new physical volume (PV) to volume group vg0, i.e. to extend the existing volume group size with new physical volume:
vgextend vg0 /dev/hdd
If no errors encounter while executing vgextend, a similar message of this will be seen:
vgextend — INFO: maximum logical volume size is 1023.97 Gigabyte
vgextend — doing automatic backup of volume group “vg0″
vgextend — volume group “vg0″ successfully extended
3. Create the new logical volume (LV) at 400MB (not fully utilize the whole IDE hard disk) to host the new EXT3 file system in question:
lvcreate -L 400M -n lvol1 vg0
Suppose lvcreate completed successfully, this similar message will be seen:
lvcreate — doing automatic backup of “vg0″
lvcreate — logical volume “/dev/vg0/lvol1″ successfully created
4. Now, create the new EXT3 file system on the new logical volume (LV) with 1% file system reserved block count:
mkfs -t ext3 -m 1 -v /dev/vg0/lvol1
Once the new EXT3 file system creation completed, you can examine the file system by executing
tune2fs -l /dev/vg0/lvol1
5. Create a mount point directory for the new EXT3 file system:
mkdir /mnt/newfs
6. It’s now ready to mount the new EXT3 file system:
mount -t ext3 /dev/vg0/lvol1 /mnt/newfs
To confirm that the new EXT3 file system has been mounted successful, type df -h
Reference and thanks to http://www.walkernews.net/2007/07/11/create-new-linux-ext3-file-system-in-lvm/
