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.

learn more… | top users | synonyms (1)

0
votes
1answer
37 views

Volumegroup using entire disks instead of partition - Extending online Vmware

Is it possible when using entire disk for volume groups to extend the assigned disks space from the vmware console, and then online the volume group after rescanning host to know the new size, or to ...
3
votes
0answers
62 views

Mirroring on external SCSI and iSCSI disks inside same volume group

On IBM P5 505 (maint level 5300-07) servers there is a concurently accessed external storage, which is connected using external Ultra320 SCSI port (DAS). External storage is detected as hdisk2 which ...
0
votes
1answer
28 views

Change partitions of disk with RAID and LVM

TL;DR: How to combine RAID + LVM partitions online (not touching rootfs)? I have a server which was used for something else before and had a certain partition structure create. df -h shows ...
0
votes
2answers
179 views

Mirroring VGs between two Linux server

I have two nodes , each has 20 HDDs (identical size) . Both nodes are configured with 2 VGs , each VG was created using 10 disks . 1 VG is called SAN the 2nd is called NAS . Node1- will provide nfs ...
1
vote
0answers
46 views

How to stop unmounting of lvm volumes when autoextend fails?

We are using lvm thin pools with autoextend enabled: thin_pool_autoextend_threshold = 80 thin_pool_autoextend_percent = 10 This is how we create the pool and the volumes: pvcreate /dev/sdb ...
0
votes
1answer
195 views

extend sda partition under LVM

My server has 4 primary partitions with data I can't delete but I need to extend the hdd as it is running out of space. I already increased the size of the vmdk file but when I try to create a ...
0
votes
0answers
41 views

Options to display only snapshot volumes for lvs

Please consider the following configuration: Hard Disk: /dev/sdb (Size 10 GB) VG: vg_root on /dev/sdb THIN_POOL thin_pool occupying the whole physical extent lvcreate -y --extents 100%free --thin ...
2
votes
0answers
76 views

lvm PV on top of dm-cache

I am running a private cloud (opennebula, KVM) where I am running VMs both directly using LVM Logical Volumes and using disk images on a file system (one is faster, the other is easier to migrate), ...
1
vote
1answer
2k views

Insufficient free space: X extents needed, but only Y available

I'm trying to extend a LVM in a Vmware Workstation 12 Pro CentOS VM. Below are the steps I am following and where I stopped because don't know how to folow from there: Create the primary partition ...
1
vote
1answer
81 views

Set up DRBD to replicate root LVM volume

I have a server using /dev/vg1/root as its / mount. I am trying to set up DRBD so that ServerA's vg1-root is mirrored to another LVM volume on ServerB, vg1-ServerA-root. I am able to create the ...
2
votes
2answers
56 views

LVM Reduce a RAID6 array

I made the mistake of setting up RAID6 using LVM directly. For better flexibility, I need to switch to managing RAID through MDRAID. Is there a way I can reduce the size of the array (freeing up ...
0
votes
0answers
16 views

The tool thin_delta segfaulting

I am trying to run thin_delta and it is segfaulting. OS : CentOS 7. Cmd: /usr/sbin/pdata_tools thin_delta --verbose --thin1 1 --thin2 2 /dev/mapper/vg_root_thin_pool_tmeta I have a thin volume and ...
1
vote
0answers
57 views

Figure out the used space on the snapshot thin volume

I have the following lvm configuration. Hard Disk: /dev/sdb (Size 10 GB) VG: vg_root on /dev/sdb THIN_POOL thin_pool occupying the whole physical extent lvcreate -y --extents 100%free --thin vg_root/...
0
votes
2answers
1k views

How to mount new logical volume (adding to fstab and mtab)?

I created a new LV for the first time using this command: lvcreate -L 20G -n iew-vm-lv /dev/ubuntu-vg #create the new LV When I try running mount /dev/ubuntu-vg/iew-vm-lv, I get the following ...
0
votes
2answers
55 views

How to mount a this logical volume

I would like to mount /dev/sda2. How am I supposed to do that? Bellow is the output of fdisk, df, lvmdiskscan, lvdisplay, vgdisplay, lvscan. [root@IctThtSoluti-06 ~]# fdisk -l Disk /dev/sda: 1030....
0
votes
1answer
27 views

LVM image still full after removing 6G of files

I am runnning ubuntu 14.04 LTS with LVM-images. After a large dataimport into solr I am facing the situation of a full partition of root. /dev/mapper/vg0-root 9.8G 9.3G 0 100% / I ...
0
votes
1answer
118 views

RHEL expand disk size

Notice: I know this type of question has been asked (many times) before, but I have some remarks about the provided answers. I run a RHEL (7.1) VM on Hyper-V. The VM has 2 IDE disks attached. I need ...
0
votes
1answer
139 views

Increased virtual disk size (vid) but /dev/mapper seems to be unchanged

I run a webserver on a virtual box, which needed to be increased in disk size; so I expanded the vdi using vboxmanage command and repartitioned to full capacity. Now fdisk -l says what follows: ...
0
votes
1answer
274 views

Linux LVM: move free space from a volume group to another

I've just read "How can you re-allocate space from one Volume Group to another Volume Group in Linux?" How can you re-allocate space from one Volume Group to another Volume Group in Linux? But I'm ...
0
votes
0answers
30 views

Convert LVM logical volume to use striping?

I don't want to change the size of LVM, I just want it to use striping. We made LV on single volume, but now we want to migrate to 3 volumes, each smaller, but have the LVM stripe across all 3 of the ...
1
vote
0answers
343 views

Mount LVM in rescue mode

I am having trouble mounting a LVM to extract a Proxmox virtual machines data. Any ideas on how I can mount it? The data is on one of the two 2TB hard drives. I think they are RAID 1 root@rescue:~# ...
0
votes
0answers
60 views

Backup strategy for LVM file sytem on NFS file server connected to SAN

I have setup a server (CentOS) on which I have connected to several LUNs from a SAN via iSCSI then multipath, resulting in multiple physical volumes I can use for LVM (dm1 ...). From the file server, ...
0
votes
1answer
35 views

lvconvert number of mirrors

I have a logical volume that is mirrored, it has two copies of the data and also its log is mirrored. It was created using something like: lvcreate -m 1 --mirrorlog I am planning to move this data ...
1
vote
1answer
114 views

Fsck finds errors in OS, but not using LiveCD

Running fsck on a booted machine yields errors on the root file system. In an attempt to fix this, I booted from a LiveCD - but fsck on the LiveCD instance doesn't find any errors at all. I also tried ...
0
votes
0answers
77 views

Unable to mount “lvm2” volume

I had to reinstall CentOS on a system with a separate disk array for data. I installed on the OS disks and kept the other disk array as storage (so they were not formatted). When I try to mount the ...
3
votes
0answers
103 views

Bad sector on disk, part of a LVM over RAID1 array, which files are affected?

My RAID1 array /dev/md1 is rebuilding after one of the disks has been replaced. Problem : the source disk has Unrecoverable Errors, and my only choice if I do not want to lose the whole data set (no ...
1
vote
1answer
287 views

KVM: how to resize guest VM disk via LVM

on the Debian host nl-ams02c-kvm02 there is CentOS guest VM nl-ams02c-ispbgp02. i resized the corresponding LVM like : root@nl-ams02c-kvm02:~# lvextend -L +10000G /dev/raid50/nl-ams02c-ispbgp02 root@...
0
votes
0answers
17 views

LVM showing fuller than it is [duplicate]

I have a LVM setup on my server and recently it reported the partition /var as being full. I extended it and extended the file system to get over the immediate problem. But on further investigation, ...
0
votes
1answer
216 views

how to get creation date of a lvm snapshot?

Is there some way to get the date that an lvm snapshot was created? lvs --version LVM version: 2.02.66(2) (2010-05-20) Neither lvdisplay nor lvs provides this information. Looking through the ...
0
votes
0answers
260 views

Linux LVM replicated Volumes

I am migrating storage arrays, on two sites.The DR site has synchronous block replication from main site that will be cut during the migration, however once the volumes are migrated the replication ...
0
votes
1answer
228 views

NFS export configuration for multiple LVM logical volumes

I have setup a file server that contains two large file systems, each consisting of a single LVM logical volume (10TB and 16TB) within a single volume group. The physical volumes making up the LV are ...
0
votes
0answers
70 views

How to resize LVM thinpool?

I am trying to partition an ubuntu 14.04.3 server where I need to have thinly provisioned LVM volumes of 20G in size. Therefore I created a thinpool of 20G and inside a LVM volume of equal size. Now ...
1
vote
2answers
26 views

How to speed up restore process with gziped LVM?

I am experimenting with creating/restoring backups with the help of LVM. It works, but the restore process takes about 8 min. on an idel XEON with 32GB RAM and SSD. The system does not even seam to ...
-1
votes
2answers
7k views

pvcreate: device /dev/sdXX not found (or ignored by filtering)

I'm unable to add a new volume (provisioned by a SAN storage) as a PhysicalVolume for the host's LVM volume. Here is the error message: #sudo pvcreate /dev/sdc1 -v Device /dev/sdc1 not found (or ...
1
vote
2answers
174 views

How check progress of lvconvert --replace

I'm replacing few disks configured with RAID5 at LVM. The command used to replace is lvconvert --replace /dev/oldpv vgname/lvname /dev/newpv It's start the process in background. The parameter -i ...
5
votes
3answers
727 views

No volume groups found - CentOS

I have migrated a CentOS 5.11 server from VmWare to Hyper-V and when trying to boot the server. I'm getting the following error messages: "No volume groups found" ""VolumeGroup00" not found" and ...
0
votes
1answer
682 views

How to automate GlusterFS backups with snapshots and dd?

I want to automate backups on a glusterfs 3.7.3 share with snapshots. Creating snapshots on a LVM manualy works, but how are they secured to a different server? I was able manage that process ...
0
votes
0answers
49 views

After installing a new disk, can't use old mount points on linux

So, I'm stumped on this one. I have functionally two volume groups. vgold and vgnew, and I migrated the lvms from the old one to the new one (via rsync of the files to an external drive first, not ...
1
vote
0answers
258 views

Freshly created LVs do not survive reboot - check of thinpool failed

In order to use gluster snapshots, I am trying to create LVs through LVM as thinly provisioned logical volumes are needed to make gluster snapshots work. Creation works, but the setup does not ...
-1
votes
1answer
105 views

Problems with Booting “red hat”. disk volumes issue

I recently installed the Red Hat 6 OS on HP proliant server. This server has 8 1TB drives. I created two volumes RAID 5 each having four hard drives (and 2.7TB). On one of the volumes, I installed ...
1
vote
1answer
112 views

Striping LVM Across Multiple MD-RAID Arrays

I have a machine with three, fifteen drive mdraid RAID-6 arrays (md10, md20, md30.) These three arrays are then setup as physical volumes for LVM and combined into a single volume group. I then have ...
1
vote
1answer
24 views

Uneven load of 2 disks in 1 volume group

We have an application server with 2 Fusion-IO SSDs put into one volume group forming one single volume. Inside this volume there are 128 files of 40GB each accessed through memory map. When looking ...
0
votes
0answers
148 views

RedHat Cluster 6 node won't see shared volume group

I try to create a shared clvm volume group shared between 2 nodes of a Red Hat Cluster 6. Here is the procedure I followed: [root@node1 ~]# pvcreate /dev/mapper/mpathab [root@node1 ~]# vgcreate -c y ...
0
votes
2answers
445 views

Installing Windows on KVM with LVM disk

I am trying to install a windows server 2012 on a KVM. The host system is Ubuntu Server 14.04. I would like to use a logical volume, say /dev/VG/win, as main device for the guest system. However, the ...
0
votes
1answer
135 views

lvremove a snapshot: “-real” files left around, what are they, safe to remove?

I removed a snapshot volume with lvremove. It says it successfully removed it. But I noticed there is a "-real" file still in /dev/mapper. I believe these "-real" files are somehow associated with ...
0
votes
2answers
52 views

Need clarification on what lvm snapshots are and how they work [duplicate]

My understanding of LVM snapshots is that: when a block changes on the origin, the block is first copied (prior to the change) to the snapshot. The block is then changed on the origin as it would ...
1
vote
0answers
51 views

LVM partition says no space even though it's not

I'm trying to do backups on my Proxmox both to an NFS share. The NFS share is on an Ubuntu (14.04) server with a 2TB HDD separated into 2 x 1TB partitions with LVM. For some reason (looking with ...
1
vote
0answers
131 views

Growing docker's volume on an LVM

I followed the instructions here to set up docker on CentOS using the LVM. I fed it a 16G disk. It consumed 6.37GB. Now, one of my containers ran out of disk space. What do I have to do for docker to ...
0
votes
1answer
128 views

Can't merge an LVM snapshot into it's origin

I recently had a problem with an LVM volume because it's ran out of CoW space. I added more space to the volume and restarted it, now it shows CoW is only 66% full. It seems LVM created a snapshot ...
0
votes
1answer
18 views

delete a snapshot created before LVM extension

I believe that snapshots and disk extensions are not friends, having said that... Is it safe to delete a VMWare snapshot created before adding a new virtual hdd to my LVM partition? What I mean is: ...