Questions tagged [lvm]

In computer storage, Logical Volume Management or LVM provides a method of allocating space on mass-storage devices that is more flexible than conventional partitioning schemes.

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Commands hangs on logical volume

I'm using virtual machine with SUSE Linux Enterprise Server 11. After one of the critical shutdowns of the server, the disk id have changed. I have changed and replaced the values with new ones in the ...
Евгений Тараренко's user avatar
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Centos 6.10 - How to increase allocated PE size to take up Free P/E size

I recently had to shrink a Clonezilla image, but overdid it an now have to recover some unused free space. Here is the output of vgadisplay: --- Volume group --- VG Name ...
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Reducing an lvmgroup - cannot resize to xxxx extents as later ones are allocated

I've been going through the process of reducing the size of a Centos 6.10 image by reducing an lvmgroup. I'm at the point where I've been able to run this command: pvresize -tv --...
Jack BeNimble's user avatar
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Striped Logical Volume

Im currently setting up a lab for LVM, three PV sdb1 sdc1 and sdd1. A striped logical volume is created named stripe01 with PV sdb1 and sdc1. Are there any options in lvconvert to add/remove a stripe ...
Trong Bao Le's user avatar
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Resizing Virtual Ubuntu Server

I have a virtual instance of Ubuntu Server running. Increased the virtual disk from 37GB to 50GB, but now stuck on getting the additional space to the LVM. I have tried lvextend and resize2fs with the ...
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Cannot extend logical volume with ansible lvol module

I cannot extend an LVM logical volume with ansible lvol module This is an excerpt from my playbook: - name: Create lv (lvcreate) become: true lvol: vg: "{{item.vg_name}} " lv: &...
Imre's user avatar
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Broken lvm results in read_urandom error

I was doing something in a chroot, and unfortunately I broke the host. Now I cannot manage the volume groups: pvs read_urandom: /dev/urandom: open failed: No such file or directory Same error with ...
Ecofintech's user avatar
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lsblk shows LVM volume as subcomponent of a partition

Given two physical drives, sda and sdb, I have: Used fdisk to make sda1, sda2, sdb1 and sdb2 Created four physical volumes accordingly: pvcreate /dev/sda1 etc Created a volume group: vgcreate datavg /...
domsson's user avatar
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How to properly update container sizes when extending kvm/libvirt disk when running into "... smaller then corresponding PV size" error?

I work on a Debian buster system as a KVM/libvirt host and followed this guide to extend the disk of my guest: https://computingforgeeks.com/how-to-extend-increase-kvm-virtual-machine-disk-size/ . ...
Andreas Schuldei's user avatar
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Is it possible to migrate between two physical disks without (much) downtime?

I have a server with a medium-sized database on a disk which is filling-up. There is no LVM or RAID or anything like that in play at this point. I already have the new disk installed in the server. Is ...
Christopher Schultz's user avatar
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How to backup large MySQL database with the help of LVM snapshots?

I am trying to find a backup/restore procedure for a MySQL 8 DB with 400M+ Rows in InnoDB tables. MySQLdump takes days and therefore I am trying this now: Mount a LVM volume on the DB Folder Create ...
merlin's user avatar
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How can I restore an LVM snapshot of a larger volume on a smaller disk?

I am trying to backup/restore an LVM volume on a local Ubuntu 20.04 (Focal Fossa) server. The production server has an LV of 500 GB, however there are only 19 GB used so far. The local development ...
merlin's user avatar
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What does the Cpy%Sync column of lvs output mean for a cache LV?

I have a host with a single cache LV (~800GB SSD in front of a multi-TB RAID array; write-through mode). I ran a routine scrub on the RAID last night (lvchange --syncaction check). Ever since that ...
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e2fsck cleans a filesystem and then a few minutes later (after a lot of reads) there are errors

The filesystem is on an LVM RAID5. It appears to be working correctly: $ sudo pvs [sudo] password for jrwren: PV VG Fmt Attr PSize PFree /dev/sda2 datavg lvm2 a-- <7.28t ...
jrwren's user avatar
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Import exisiting Logical Volume into Openstack

My Openstack (Microstack on Ubuntu) got screwed up and I had to reinstall it. Putting a backup of the Openstack config back in place didn't work so have to start "fresh". The problem now is: ...
Nephews's user avatar
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How to free space in lvm pool?

I have a newly built CEntOS 7 server with a single large lvm pool we plan to use for VM installations. When I tried to create a new VM instance using ssm, I got errors saying there's no space. So I ...
mav1c's user avatar
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How do I recover a broken logical volume group?

I created a logical volume group for my xen VMs on a separate drive. I had them working perfectly. Then I accidentally unplugged the USB cable hosting my vg0. Now my VMs drives cannot be detected. I ...
brad's user avatar
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Recover LV from Cachepool

I have a RHEL VM which has 4 x 500GB disks attached to it from the host machine - which it serves from a 3-node RAID5 storage disk. I didn't build in redundancy on the LV layer, because the disks were ...
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How can I extend or resize lvm from disk space

We use ceph to manage the storage and recently increased /dev/sdb's disk size. I'm not sure how to utilize the newly available space in my ceph's lvm. sdb ...
rafas's user avatar
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LVM: duplicate PVs were found

I have 3node cluster(centos7), While installing glusterfs and heketi i found issue of duplicate pv in LV. [centos@master-node ~]$ sudo pvs WARNING: Not using lvmetad because duplicate PVs were found....
Vikram Ranabhatt's user avatar
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1 answer
657 views

Unable to resize lvm to max of vda

I am trying to resize my lvm partition frm 29GB to ~60GB. Here is my current status: root@demo:~# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 ...
Nitescu Lucian's user avatar
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2 answers
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How to resize LVM partition in my setup?

I have a CentOS 6 VMware VPS with the current partition format : Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_serverdl-lv_root 11G 4.9G 4.7G 52% / ...
master lfc6's user avatar
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Do I need a spare slot to replace a drive in an LVM raid array?

I am planning to set up an LVM raid 5 array and looked at how to replace a faulty drive. I found the replace command lvconvert --replace dev_to_remove vg/lv [possible_replacements] For this to work, ...
The Shurrican's user avatar
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793 views

How to increase PV in Ubuntu after Virtualbox VDI resizing?

I did run out of disc space for the root partition in Ubunut 20.04. This is a guest system on Virtualbox. Therefore I did: Resized disk in virtualbox Attached it to another linux box Booted the other ...
merlin's user avatar
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Need to make some Free space VG PE Size

I want to add 150GB space in Free PE /Size. How can I accomplish this? [root@localhost ~]# vgdisplay rhel01 --- Volume group --- VG Name rhel01 System ID Format ...
Singh1812's user avatar
2 votes
1 answer
920 views

Grow mdadm raid from raid1 to raid0 with active lvm

We rented a server with two NVMe disks in a raid1 configuration with a lvm on top of that. Is it possible to change the raid level to raid0 without making any changes to the lvm config? We don't need ...
Leifb's user avatar
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speed difference between FS created by LVM and parted cmd

I was testing read/write operation on FS to check speed via dd cmd. /app - created with LVM /app1 - created with parted when I run below cmds, can see huge diff in speed for both operation with same ...
user640121's user avatar
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Modprobe error at boot

I'm using LMDE4 with LVM on LUKS and recently I've been getting these cryptic error messages at boot: modprobe: module aes-i586 not found in modules.dep Volume group "lvmlmde" not found ...
janeyamatoshi's user avatar
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1 answer
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Can not move extents after pvmove --abort

I wanted to move extents from one disk to another, both have the same size: # pvmove /dev/sdd1 /dev/sdc1 Unfortunately, pvmove hung at 99.99% for several hours and I decided to issue a pvmove --abort....
reox's user avatar
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Best Practice: Add an Additional Disk to Expand Logical Volume or Expand Existing Disk

We host a client’s Oracle VMs on our Nutanix platform. To date, whenever their VMs require more space they have us add an additional vDisk which they then add to the VG in order to expand the required ...
Reginald Greyling's user avatar
1 vote
0 answers
546 views

Recover encrypted LVM

I had Debian install running on LUKS encrypted LVM. This morning, I wanted to install OS on external disk to be used on another host, but mistakenly I chose the wrong disk... Few seconds in I noticed ...
jctest's user avatar
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One LVM for multiple nodes in cluster

We have a cluster with 3 nodes. On one node hard disks have been added and configured as LVM. The idea is to make this LVM also available on the other nodes. Therefore, the other nodes were added to ...
Ben Schäffner's user avatar
1 vote
1 answer
343 views

Issue with removing LV disk space that was extended from another disk

I have a redhat server with two disks 100gb and 500gb. The 500GB disk was unused, however I then used it to extend the /var LV. The filesystem on all mountpoints are xfs and you actually can't reduce ...
Alex's user avatar
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LVM filter does not stop when rule matches?

I have a problem with a lvm filter configuration. I want to filter out certain devices/partitions from lvm scan. I can do it by making filter like so: filter = ["a|/dev/disk/by-partuuid/<uuid&...
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3 votes
1 answer
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Using two SSDs for Hot-Warm-Cold Caching a HDD on Linux

I currently have a debian-based Linux system that I'd like to optimize heavily. This machine has three different drives: An SLC SSD, a QLC SSD, and a 4TB HDD. I wanted to know if it was possible to ...
Swivel's user avatar
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Create an Fully Automated Installer for Debian with FAI

I searched on Google about creating Fully Automated Installer for Debian. My aim is to have an ISO file, make it bootable in pendrive. So if I plug this pendrive in a computer, power on the physical ...
Kalib Zen's user avatar
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Fresh Ubuntu 20.04 install no disk space on / and unable to extend

I have fresh Ubuntu 20.04 with 50GB disk size installed using defaults. Now I don't have any space left on /dev/mapper/ubuntu--vg-ubuntu--lv. df -h Filesystem Size Used Avail ...
wojcieh's user avatar
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Unable to extend, create and attach openstack volume to an instance

I am running Ocata openstack on Ubuntu 16 and trying to extend an existing volume from 100GB to 250GB by following the link: https://docs.openstack.org/cinder/rocky/cli/cli-manage-volumes.html After ...
gbayi_omo's user avatar
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0 answers
229 views

How to resize img file created with dd on LUKS-LVM partition?

I have installed a new Debian 10 on /dev/sda with LUKS + LVM. It has the following partition structure: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 79G 0 disk ├─...
Kalib Zen's user avatar
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Ubuntu 20.04 new fresh LVM on 5TiB shows just 4.1 TiB space

On a fresh installed Ubuntu 20.04 I attached second disk with size of 5 TiB. I used following commands to create LVM. Disk /dev/sdb: 5 TiB, 5497558138880 bytes, 10737418240 sectors Disk model: Virtual ...
wojcieh's user avatar
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Add disk to software raid pool

I have a setup like this there run a mirroring software raid1 but its possible to add a disk more and use its like a raid5 or how do i add more storage to the raid? Current with 2 disks | / | /var | /...
The Tech Guy's user avatar
2 votes
0 answers
241 views

How to convert LVM on MDADM RAID1 on two MBR partitioned drives to GPT without data loss

I have an Ubuntu 18.04 LTS Server with two 3TB Fujitsu SATA disks with MBR partition tables. Output from fdisk -l and lsblk is shown below : sudo fdisk -l /dev/sd[ab] Disk /dev/sda: 2,7 TiB, ...
storestyggeulv's user avatar
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2 answers
803 views

Mixed HDD size storage system with parity

Im searching for a way to get the most out of "spare" HDDs. Following setup given: 1x 2 TB 2x 3TB 2x 6TB What i want/need is: Parity (1x HDD can fail. For example, one of the 6TB. Data ...
Marc's user avatar
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1 vote
1 answer
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Atop shows MDD stuck at 100%

After investigating a load spike on my CentOS 7 server, I ran atop and noticed something odd. It is reporting MDD for my logical volume (md127) maxed out at 100% all the time. The other disk tests I ...
Grindlay's user avatar
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LVM PV missing on boot - dropped to initramfs shell

I rebooted my ubuntu 20.10 server today and it suddenly started complaining that it cannot find one of the PVs in the root LV After some digging around in the shell that it dropped me to I could see ...
Declan Shanaghy's user avatar
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2 answers
2k views

Grow raid5 lvm by adding extra disks

I have 3 drives that I want in raid5 to get the most space utilization while still allowing a disk failure. But I want to be able to expand the array later when I have more disks (likely up to 7 ...
cclloyd's user avatar
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2 votes
2 answers
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Difficulties on remove/resize an LV. [device busy]

i'm facing difficulties removing a logical volume from my server on SLES11SP3. Checked online for help, tried many things with no success, thus i ask the experts. # lvscan ├─vg-lv_a (dm-22) 253:22 ...
DanS's user avatar
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How do I resolve this LVM issue in Ubuntu on a USB External Drive?

I'll try to be brief and succinct. I recently wiped my Ubuntu server and re-installed 20.04 on an older Proliant DL360. This system had two seagate external USB drives attached to it which store a ...
Jon Griffith's user avatar
1 vote
0 answers
28 views

LVM: how to strip Logical volume without impacting existing data?

I have an LV lv1 backed up by a VG vg1 using 2 PV pv1 and pv2. From lvs I understand that the layout of the LV is linear: # lvs -o+lv_layout,stripes LV VG Attr LSize Pool ...
yayg's user avatar
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From mdadm raid to LVM (raid or mirror) decisions and how to monitor

We are migrating some server from linux raids (0 and 1) to LVM with stripe or mirrors. At the moment our systems are mainly configured something like | /tmp - /home - /others |------------------------...
luison's user avatar
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