This post will cover how to increase the disk space for a VMware virtual machine running Linux that is using logical volume manager LVM. Firstly we will add a new disk to the virtual machine and then extend the original LVM over this additional space. Basically we will have two physical disks but just one volume group and one logical group that is using the space on both disks together.
With this method there is no down time for the virtual machine. As there are a number of different ways to increase disk space I have also posted some different methods here:. Be very careful when working with the commands in this article as they have the potential to cause a lot of damage to your data.
If you are working with virtual machines make sure you take a snapshot of your virtual machine beforehand, or otherwise have some other form of up to date backup before proceeding.
It could also be worth cloning the virtual machine first and testing out this method on the clone. Throughout my examples I will be working with a VMware virtual machine running Debian 6, this was set up with a 20gb disk and we will be adding a new 20gb disk for a total LVM size of 40gb.
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Now that we have confirmed we are working with an LVM we can continue. For increasing the size of a Linux native partition hex code 83 see this article. First off we add a new disk to the virtual machine. Select the disk size you want to add, I "Lvm resize root partition online dating" be using 20gb as previously mentioned. I have also selected to store the disk with the virtual machine, it will store on the same datastore as the virtual machines files, this will be fine for my test purposes.
Click next once complete. You will then see the new disk under the hardware devices tab and it will be labelled with adding which means it will not apply until you click OK, so click OK to complete the process. It is also worth noting that it shows as not containing a valid partition table, we are about to set this up. This may not however be the case for you, to avoid reboot you may need to rescan your devices, you can try this with the below command.
Note that you may need to change host0 depending on your setup. If you have issues detecting the new disk, just perform a reboot and it should then display correctly. Next we press the enter key twice, as by default the first and last cylinders of the unallocated
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Next we will use the pvcreate command to create a physical volume for later use by the LVM. Now we need to confirm the name of the current volume group using the vgdisplay command. The name will vary depending on your setup, for me it is the name of my test server. Next we need to increase the logical volume with the lvextend command rather than the physical volume which we have already done.
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Firstly confirm the name of the logical volume using lvdisplay. The name will vary depending on your setup. The logical volume is then extended using the lvextend command. If you like you can then run vgdisplay and lvdisplay again to confirm the size of the volume group and logical volume respectively, I have done this and I now have the following. Rather than resizing the file system manually, you could instead use the -r option of the lvextend command which will automatically resize the file system to make use of the additional disk space.
We have now increased the total disk space on the virtual machine by first adding a new virtual disk through VMware, created a new partition out of this newly unallocated space within the guest OS, turned it into a physical volume, extended the volume group, then finally extended the original logical volume over the newer physical volume resulting in overall disk space being increased successfully.
Lvm resize root partition online dating allows for disk space upgrade with no down time, my virtual machine was not shut down or rebooted at all during this process.
This is a very useful technique for upgrading disk space on production servers that can not go down. These instructions are perfect. Not only was this exactly what I had to do on a production server, but your guidance and explanation of each step was right on!
Great instructions at the perfect pitch. Very useful tutorial, with everything working precisely as described. Like Mark, I also needed to run e2fcsk -f before resize2fs, but besides that, you had it spot on.
Just resized a partition under my oracle db without any problem: Thnx for the effort! My understanding is it makes little difference either way and in my mind it is one less partition table that can become corrupt and one less layer to troubleshoot. If there is a benefit to partitioning the drive first
Lvm resize root partition online dating would be glad to hear it. I tried all the steps but at then end I get an error: Is it possible to add a new disk from another node?
Have you looked into using NFS? Keep up the great work! Great article, please keep it up. The instructions are clear and everything is covered. Worked perfect on one server. Thanks so much for the clear instructions, they were right on the money. Thank you very much for this step-by-step manual! It helped me as a newbe solving a pretty technical issue.
Now I feel a bit more experienced and would recommend your page. Great instructions, this is exactly what I needed to
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Thank you, I have increased my VM disk succesful with this manual and had no issues at all, fantastic well documented! Or did you mean increasing the original virtual hard disk, rather than adding a secondary one to expand into? You sir know how to write clean and clear guide. Saved me hours of work trying to figure out how LVM work.
Hi Karan, just wanted to let you know that I have now created a guide on the reverse process, that is resizing the Linux LVM by shrinking it rather than expanding it. It is really helpful and the steps detailed.
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I am newbie and I was able to add disk and extend an existing logical volume with ease. Thanks for the good write-up. Jarrod, I was searched in other websites for a long and not satisfied. But this post is awesome reference for me. Would have been better ,if you could detailed explain on this below for a newbie
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Thanks CK, this should answer your question: I was searching many stuffs for the past 2 days and I finally found it here. Now thanks to your help everything is golden again! Have a Great Year! I refer to this article almost every quarter. This is the best, most readable guide to get this done. I refer to it a lot myself so I try to keep it updated and make sure it does what I need.
Thank you this really helped me a lot! Thank you; very easy to follow instructions. Just added more space to a VM by creating a new disk and using the LVM commands provided in this blog post. If so what file system is in place?
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This was a lifesaver. Unlike me it never forgets! Awesome post from 4 years ago and still relevant today. Thanks for the assist. Really thx this is best page I find, after search and ask people who never say yes to any help request. All works perfect
Lvm resize root partition online dating debian wheezy on cloud from 20Gb to 30GB Thx again. All is ok and I have now 30GB root disk. Or I have to add a 3rd HDD? LVM is a great utility...
Yes, if you increase the second virtual disk you can either create a new partition on that disk to use the new space, or look at increasing an existing partition on the disk to use that new space.
This guide is simply awesome. Thank you so much for the steps. Works perfect on Ubuntu Almost committed to memory. This guide was awesome. Hello, i have an issue. I used the same steps to create a partion. How do i sort this issue? Permission denied to resize filesystem. I can see from pvdisplay,lvdisplay that new disk is added, could you let me know how to undo the actions by removing the added disk from lvm.
If you're using LVM, it's...
Thanks for putting it together. Save this in my notes for the next time I need to do an LVM resize…. This command is used to resize ext2/ext3/ext4 file system online. The command to extend LVM partition to another disk remains the same. A quick and dirty tutorial on resizing a root Ubuntu partition via the In my scenario I increased the size of my Virtual Machine disk in Step 7 Next we need to extend the Logical Volume with lvextend Stay up
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If you're using LVM, it's easy, and you presumably know how to proceed. If you're using classic partitions, it's a bit more complicated, and may require a It is possible to do a on-line resize of a ext4 filesystem, even if it's your root partition. everything comes back properly (I had a date/ntp issue afterward).