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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How to use lvconvert with two disks for mirroring? - Insufficient suitable allocatable extents

On a RHEL 5 I have to create an LVM mirror from multipath disks. There are enough free extents, but - on two disks, because the VG was made out of 4 disks. [root@SERVER ~]# pvs -v --segments | head ...
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Copy centos 6 modify mdadm raid 1 and clone to new mdadm raid 1 ssd

I have: Centos 6.7 grub-install -v grub-install (GNU GRUB 0.97) lsblk two new SSD 128gb Live usb with Parted_Magic_2015.03.06 /boot/grub/device.map # this device map was generated by ...
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LVM Raid 1 + SSD Caching

I have three disks: /dev/sda slow hdd /dev/sdb slow hdd /dev/sdc fast ssd /dev/vg0 volume group consisting /dev/sd{a,b,c} Each logical volume (lv) should be raid1 mirrored and ssd cached. With ...
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Scan only new files whit clamav [duplicate]

I have a cron script witch makes snapshots every day and scan the whole partition whit clamav. But if possible it would bee a better idea to scan only the modified files i think. The snapshot is ...
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External Drives on RAID/LVM configuration

I had 2 drives corrupted and now replaced with new ones sitting on RAID 0. After installing the new drives I have attached the 2 old corrupted drives via usb to retrieve data from them. These 2 drives ...
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134 views

low write disk speed of windows kvm guest with LVM

I have a trouble with my windows 2008 R2 KVM guest. It write speed to disk extremely slow: But on another VM (windows 10) on this KVM host write speed is ok: # cat /etc/system-release CentOS Linux ...
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Server fails to boot with lvm error : ¨Invalid argument for --available: ay Error during parsing of command line.¨

We have problems with our storage server, it was not updated for a while so we tried to updated it, tho during the update process (it needed some 2k package updates) it totally blacked out. (no screen ...
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setting nr_requests for build server - LVM partition

I have a build server with a free ram of about 120 GB after boot. I also have 3 disks in total, which I am using as one LVM with 3 stripes. I would like to increase nr_requests for the block device. ...
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51 views

LVM2: Can I change the LV size (not COW-table size) of a snapshot?

I'm curious if it is possible to create a snapshot of (e.g.) 10G volume, and then resize the snapshot to be 20G, along with the file-system within? Using lvresize or lvextend only alters the ...
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47 views

LVM thin snapshot unavailable

To test out thinly provisioned snapshots before applying them to a production system for backup purpose, I did the following: lvcreate -L1G -T storage/thinpool lvcreate -V10M -T storage/thinpool -n ...
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Extremely slow disk speeds Centos 6

Setup looks as follows: + HP Proliant DL380 G7 + 6 x 3TB Sata drives (surveillance level) configured with hardware RAID 1+0 with the SATA controller on board. Model is Seagate SV35 + 192GB RAM ...
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How to unlist partitions from fdisk command in linux

While working on one of my server I noticed that there are no partitions listed under "fdisk -l" command. However the machine is working just fine. Wanted to know following things if anyone can help. ...
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130 views

Merge Logical Volume groups

I want to increase root LVM volume space. Is it possible to merge LogVol01 to LogVol00? My LVM setup looks like this: [root@server~]# lvs LV VG Attr LSize Origin Snap% Move ...
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67 views

Transaction id mismatch on thinly provisioned LVM-Volumes

I have setup a thinpool with 3 thinly provisioned LVM volumes inside. After increasing the size of those I did run into serious problems and now I would like to remove the thinpool in order to start ...
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353 views

Can't remove LVM thinpool - unable to deactivate tdata, tmeta

I somehow messed up some thinly provisioned lvm volumes on ubuntu 14.04 and now I want to start fresh by deleting the thinpool with all its volumes and data inside. Unfortunatelly this failes and I ...
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How to mount large LVM image on ubuntu 14.04 on root?

I am running ubuntu 14.04.03 and need to mount thinly provisioned lvm volumes for glusterfs to the system. I did this first by adding them to /home/glusterfs/dir, this worked as /home has 120G of ...
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142 views

lvs output : Data% column

Following is a example of standard lvs output: LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert POOL VG twi-aotz-- 399.80g 28.12 14.75 ...
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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 ...
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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 ...
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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 ...
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142 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 ...
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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 ...
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131 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 ...
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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 ...
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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), ...
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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 ...
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64 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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: ...
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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 ...
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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 ...
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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: ...
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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 ...
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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 ...
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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:~# ...
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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, ...
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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 ...
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98 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 ...
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67 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 ...
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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 ...
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245 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 ...
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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, ...
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140 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 ...
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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 ...
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157 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 ...
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60 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 ...
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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 ...