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.
1,530
questions
1
vote
1
answer
400
views
Measure the ratio of thin pool overcommitment
Is there a simple command to show just how much disk space total has been allocated in total within an LVM thin pool, and maybe also compute the ratio of disk space allocated by thin volumes to the ...
0
votes
0
answers
2k
views
Damaged volume group on Ubuntu
Ran into a problem with FDISK/LVM: needed to add an additional new disk to Ubuntu Server 20. This has a storage setup using LVM/VG using the default setup configuration.
Used fdisk /dev/mapper/ubuntu--...
1
vote
2
answers
1k
views
Can't restore LVM Logical volume configuration - missing PV
I had a VG with 3 pvs. The VG had one LV using all three PVs. Then one PV (hdd) died. I wanted to try to recover whatever I could. So the first thing I needed to do was to remove the missing PV from ...
1
vote
1
answer
596
views
Ignore the warning less of swap partition while preseed loading
I have the automatisation debian preseed script. Here is partition rules with sharps for swap in my preseed file:
!d-i partman-auto/expert_recipe string \
boot-crypto :: ...
0
votes
1
answer
116
views
Which commands should be run to create this partition, volume group, and LVMs?
I have been tasked with configuring newly attached disks with a specific configuration. I am given a 500G physical disk at /dev/abc. The disk is not formatted and has no paritions. The following is ...
0
votes
0
answers
248
views
LVM: How to remove the extra segment created when converting RAID1 to RAID5?
I had two 1T HDD and a 500GB RAID1 LVM LV across them. Then I added another 2T HDD, and converted the LV to RAID5 using
pvcreate /dev/sdd
vgextend ubuntu-vg /dev/sdd
lvconvert --type raid5 --stripes 2 ...
1
vote
1
answer
150
views
qemu-kvm: prevent host from accessing passthru LVM disks
I am running multiple Ubuntu (5.4.0-117-generic) qemu-kvm hosts. On each I am passing multiple block devices through to VMs thusly:
<disk type='block' device='disk'>
<driver name='...
0
votes
1
answer
434
views
LVM Extending Fails
I'm running a VM in proxmox. I originally didn't have enough space allocated to the VM so now I'm trying to extend it. I've allocated more space in proxmox. And it is recognized in sda3.
I was using ...
1
vote
0
answers
547
views
lvcreate hangs on snapshot creation
on a Debian testing lvcreate hangs on snapshot creation since some weeks:
A that point I have to hardware reset the machine. After reboot the log file is empty and syslog shows nothing. On another ...
2
votes
0
answers
40
views
VM Logical Volume shown on Host
Some context, I've builded an Opennebula cloud (https://opennebula.io/). I've been using it for more than 2 years now without any issue on that side. Recently i've noticed a strange behavior.
On my ...
2
votes
1
answer
1k
views
New LVM VDO logical volume inactive at startup, even with "--activate y" parameter
I'm trying to make LVM VDO work on my Debian 11.3 (test VM installed from scratch). I've shared my installation procedure here if someone wants to reproduce the problem. Now I'm stuck with a "...
0
votes
0
answers
3k
views
How to mount volume type LVM2_member to EC2 instance
I'm trying to mount a volume taken from an old EC2 to a new EC2 instance, however, this volume has an "unknown filesystem type of "LVM2_member". I tried all this with the original ...
1
vote
0
answers
536
views
cannot remove pv from lvm config when disk unavailable
I have a vm with 2 disk and 2 VG, on of the disk is a PV (no partition). OS is CentOS 7.
Now the disk is unavailable. The PVS displays:
# pvs
WARNING: Device for PV L9Anor-qlzF-mTT7-Rxx0-Ovig-hMQI-...
0
votes
2
answers
592
views
How can I make LVM configs boot tolerant with attached USB drive
Setup: DELL PowerEdge R520, oVirt Node 4.4.1 x86_64
# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 onn_ovirt01 lvm2 a-- 105.26g 20.77g
/dev/sda3 VG_he_nfs lvm2 a-- &...
0
votes
1
answer
1k
views
Mount DD image of LVM partition
I am in a conundrum. I need to extract data from a backup image I created previously. I thought I knew enough about LVM to get by... at least until now.
It seems my blunder is that I backed up an LVM ...
0
votes
1
answer
708
views
Very big device in Centos
I have older VM (Centos7) where I have many disks. Now it is 36 vmdk (22TB). I wanted extend one virtual disk to 2400GB and create new partition for LVM (3th on disk). But after I create partion I see ...
0
votes
1
answer
1k
views
How can I resize my default ubuntu lvm?
I need to add to default ubuntu lvm partition +20GB space. How can I do it in my case?
You can see output of lsbkl command below. This is my virtualbox VM, not production server, and all of this ...
0
votes
1
answer
441
views
change name of pv suse linux 12
the output of the pv is showing the name of isci name and not the /dev/sda2 for example. Anyone is telling me why I can hange the name of the pv
lxxxxxx:~ # pvs
PV ...
0
votes
1
answer
1k
views
How to edit attributes of lvdisplay (LVM)
In a lvdisplay command, there is an attribute to display the hostname of the machine we created the logical volume.
I want to modify the hostname. how can I modify "LV Creation host" ...
0
votes
0
answers
1k
views
LVM aggressive read and write cache
I've added a 2 TB RAID1 SSD as a writeback cache to a 10 TB RAID1 HDD using LVM 2.03.11(2) (2021-01-08) like this:
lvcreate --type raid1 --mirrors 1 --nosync -l 100%FREE -n sshd sshd /dev/sdc /dev/sdd
...
0
votes
1
answer
165
views
Can Block Device IDs in LVM be set statically?
I have a system using LVM2 with a single PV which contains 1 VG which in-turn contains 5 logical volumes (/, /home, /var, /swap, /data).
When I create a snapshot of LV / (lvcreate -L 15G -s -n ...
1
vote
1
answer
1k
views
systemd: Configure correct dependencies with LVM devices
I have a device setup that I don't know how to model correctly with systemd:
The setup
I have the following setup:
---------
| mount | /mnt/*
...
6
votes
3
answers
10k
views
Linux LVM - PVID last seen on
Devices file sys_wwid nvme. PVID last seen on /dev/nvme0n1p2 not found.
OR
Please remove the lvm.conf filter, it is ignored with the devices file.
Seems this is happening on RHEL 9 / CentOS 9.
1
vote
1
answer
724
views
How to resize unmountable BTRFS filesystem
I have a disk with LVM with two logical volumes media and root. The former is almost empty the latter is almost full, so I wanted to resize both.
The logical volume media is dm-crypt + BtrFS. In order ...
2
votes
1
answer
777
views
LVM with uneven proportional "stripe" distribution over 2 disks of different sizes
Is there a way to create a "striped" LV in a VG with 2 disks of different sizes in such a way it utilizes 100% of the available space?
Linear LV would work, but I want to have the load ...
2
votes
1
answer
889
views
How to use ext4magic in LVM?
I'm trying to recover using ext4magic.my partition was LVM.
try to execute command
ext4magic /dev/sda1 -J -f -s 2048 imges/
error
/dev/sda2 Error 2133571347 while opening filesystem
ext4magic : ...
0
votes
0
answers
514
views
pvcreate does not work: Device /dev/sda3 not found
As I recall I accidentally removed partition with fdisk and left changes which I did on LVM, then I did restart and Centos was not able to boot normally, it booted to Dracut.. It is my fault that I ...
0
votes
1
answer
590
views
Centos Kickstart - partitioning fails because of arbitrary disk order
I've prepared a kickstart file for a Red Hat Virtualization 4.4 VM with 3 virtio-scsi disks with different disk sizes:
# System bootloader configuration
bootloader --append=" crashkernel=auto&...
0
votes
0
answers
999
views
extend volume of CentOS7 VM
There is an issabel VM which I increased the VM hard drive from 20G to 1.07T through ESXi.
Next I add sda4 partition as new Linux LVM (following this path at step 22 ), seems I have to use vgextend [...
2
votes
1
answer
5k
views
lvmcache/dm-cache writeback cache full performance
I have a SSD writeback cache in front of a HDD, set up through lvmcache (so a dm-cache). When the cache LV is not full (Data% column in lvs < 100.00%), writes go to the cache device (monitored via ...
0
votes
0
answers
74
views
Perform backup of root directory in luks-container form initramfs
My server is running from a root directory in an encrypted luks container with lvm layout.
To perform a backup of the root partition, it is usually the consensus that the filesystem can not be mounted,...
0
votes
1
answer
1k
views
What's the best way to set up LVM on an AWS EC2 Instance running Ubuntu?
basically I want to setup an EC2 instance that is properly setup with LVM, instead of what you get when you start up one using the basic Ubuntu AMI which is completely un-partitioned.
Where I'm ...
2
votes
1
answer
708
views
LVM - pvmove to a smaller volume
I would like to pvmove a logical volume to a smaller, but faster drive, leaving the excess part on the original drive. Can that be easily accomplished?
1
vote
1
answer
4k
views
Resize AWS LVM volume
I have successfully increased the space on AWS EBS volume.
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 64G 0 disk
├─nvme0n1p1 259:1 0 63.9G 0 part /
├─...
0
votes
1
answer
1k
views
Deactivation of lvm volume group surviving boot
due to a failing hard disk, I would like to deactivate the volume groups living on it, to make sure that the disk is messed with as little as possible until it gets replaced.
I know that I can ...
0
votes
1
answer
165
views
lvm recovery with raid reconfiguration
I have a Dell R510 with a H200 controller previously and I have two disks: a 2T SAS and a 250G SSD. I created two raid0s using those two disks on H200 and then created lvm on top of it. Here is my ...
0
votes
2
answers
1k
views
Recover a failed Physical Volume (PV) in LVM
My motherboard burned. After getting a new motherboard and attaching the disks, recovering a failed PV fails, because the hard disk size has decreased.
# pvcreate --test --uuid "wcUYiJ-ULvA-YcLK-...
3
votes
3
answers
4k
views
How to increase speed of RAID 5 with mdadm + luks + lvm
I think I am kinda lost with my current server setup.
It is an HP Proliant dl160 gen 6, and I put 4 spinning disks with a setup that has mdmadm + luks + lvm and on top of it btrfs (maybe I went too ...
0
votes
1
answer
333
views
Linux -LMV DM devices IOPS count
I know this might sound like a silly question, but here I go. I have CentOS 7 running in a server with a disk using LVM, according to the vendor the disk could achieve 500 iops, the disk is under /...
2
votes
0
answers
137
views
Getting DRBD to boot up in a synchronized state from cold boot
I am working in an environment with an embedded High-Availability NVMeoF cluster, and need this cluster to be available within minutes of a cold power-on of all nodes, and trying to set up a RAID-10 ...
3
votes
1
answer
2k
views
How to create LVM RAID 1 with 4 disks of 2 different sizes?
I have a system with
2 x 1TB (NVMe SSDs)
2 x 2TB (SATA SSDs)
disks and would like to create a RAID 1 system using all available disks (so I have a 3TB RAID1 system at the end). Unfortunately, most ...
0
votes
1
answer
421
views
Properly Extend virtual volumes on a CentOS VM, new space in /dev/cl/ not occupied by /dev/mapper
I have a CentOS VM (on a windows host, managed with virtualbox) that ran out of disk space.
I extended the virtual disk size, then used gparted to assign the new space to the existing partition
Then I ...
0
votes
1
answer
107
views
Have lvm spread LVs across several PVs
I have a server with multiple disks. Most are raid1:
PV /dev/md127 VG HDDs lvm2 [465.63 GiB / 421.63 GiB free]
PV /dev/sdg1 VG backup lvm2 [<931.51 GiB / <931.51 GiB ...
1
vote
1
answer
238
views
LXD on ZFS on LVM on H/W RAID 10
I have a Dell R540 with PERC H730P running RAID 10 over 12 DISK to the tune of ~22TB. I want to run various applications/services in LXD containers.
I understand that ZFS is preferred for LXC storage ...
1
vote
1
answer
2k
views
Add new disk to LVM group using ansible module
Team, there are lvol module but I am having hard time find way to add new device to existing VG group. so I took alternate route to use shell module and running RAW commands. but is there a way I can ...
0
votes
1
answer
182
views
Recovering a nested PV
On my Proxmox 6.4 host, I had an LVM Thin pool that was 250GB large. I created an Ubuntu VM (which used LVM for the root partition as well) on it, but accidentally oversubscribed it, so the PV inside ...
0
votes
1
answer
132
views
Create lvm volume in the last cylinders of the disk
In all magnetic disks, the speed difference between the first and last sectors is noticeable, up to a factor two or three. This is still true with the new multi-terabyte disks. So it still makes sense ...
2
votes
1
answer
7k
views
Proxmox VE: add a LVM storage on top of iSCSI: how to find "base" value for pvesm
I'm using Proxmox VE platform, version 6 or 7, and I'm currently documenting the initial setup with the idea of automating it later.
So I'm looking for all command line commands to do all that I must ...
0
votes
2
answers
2k
views
Is it possible to backup a LVM disk to an external server?
Over the past month I've been putting my mind into how LVM works. The initial thought was that it is very flexible, I was surprised the system could still run while moving the disk to another local ...
1
vote
2
answers
3k
views
OpenStack node not booting after forced shutdown, ubuntu--vg-ubuntu--lv does not exist
After forcibly rebooting my OpenStack compute & block storage node, it no longer boots; how can I fix this or recover its data?
Gave up waiting for root file system device. common problems:
-Boot ...