# VM Guest Disk Resizing **URL:** \ **Category:** SLES Virtualization\ **Created:** [October 28, 2011, 8:26pm UTC](https://forums.suse.com/t/vm-guest-disk-resizing/22065 "2011-10-28T20:26:02Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![System1](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@System1](https://forums.suse.com/u/System1)\ **Post date:** [October 28, 2011, 8:26pm UTC](https://forums.suse.com/t/vm-guest-disk-resizing/22065/1 "2011-10-28T20:26:02Z")
Hello, I am attempting to resize (increase) an existing VM guest disk. The host is running SLES10 SP3 and all of the VMs have been created under an LVM group on the host system. The VM guest is configured with resiserfs as its own file system. I was able to successfullly increase the disk size as desired, but the guest file system has not recognized and increase to the new size. Attempts to increase the file system have failed. I have attempted to use the following commands: resize\_reiserfs /dev/vgo/\ resize2fs /dev/vgo/\ How can I successfully increase the block size of the system partition on the guest vm or get the guest system to recognize the added storage space - without losing data. Thanks in advance. ## – nomad213 nomad213’s Profile: [http://forums.novell.com/member.php?userid=116754](http://forums.novell.com/member.php?userid=116754) View this thread: [http://forums.novell.com/showthread.php?t=447494](http://forums.novell.com/showthread.php?t=447494) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [October 28, 2011, 10:26pm UTC](https://forums.suse.com/t/vm-guest-disk-resizing/22065/2 "2011-10-28T22:26:02Z")
Short version: add a second, larger disk to your VM Guest, then use GPARTED to copy / resize old to new. Done. Long version… OK, so this is XEN, right? So do you get an error message when you try to resize? ( I hope so. ) What guest OS is this? For example, SLES 10.x didn’t support live resize, and you had to boot into a live CD or boot in recovery mode and resize the guests boot file system with it unmounted. If you have a snapshot protecting your VM, then you can undo if it goes bad. If not, I would opt to create a NEW additional larger disk on the guest. Then boot the VM guest with GPARTED and duplicate / resize the old disk onto the new one. Once you confirm the new disk is happy, then you swap out the old with the new. This way you have no risk of data loss. Its also easy. – Bob ## – Bob Mahar – Novell Knowledge Partner Do you do what you do at a .EDU? [http://novell.com/ttp](http://novell.com/ttp) “Programming is like teaching a jellyfish to build a house.” More Bob: ‘Twitter’ ([http://twitter.com/BobMahar](http://twitter.com/BobMahar)) ‘Blog’ ([http://blog.trafficshaper.com](http://blog.trafficshaper.com)) ‘Vimeo’ ([http://vimeo.com/boborama](http://vimeo.com/boborama)) ← Click And Be Amazed! Bob-O-Rama’s Profile: [http://forums.novell.com/member.php?userid=5269](http://forums.novell.com/member.php?userid=5269) View this thread: [http://forums.novell.com/showthread.php?t=447494](http://forums.novell.com/showthread.php?t=447494) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [October 29, 2011, 12:36am UTC](https://forums.suse.com/t/vm-guest-disk-resizing/22065/3 "2011-10-29T00:36:02Z")
The guest OS is also SLES10SP3. The error received is… “the reiserfs superblock cannot be found on /dev/vg0/\” TID 3786220 explains how to accomplish this in SLES10, but maybe I missed something. I will look at GPARTED. ## – nomad213 nomad213’s Profile: [http://forums.novell.com/member.php?userid=116754](http://forums.novell.com/member.php?userid=116754) View this thread: [http://forums.novell.com/showthread.php?t=447494](http://forums.novell.com/showthread.php?t=447494)