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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6
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804 views

Grub2 reports physical volume pv0 not found on server non bootable anymore

I first installed my ubuntu server (11.10 amd64) using lvm but not fully mastering the concept of it. I think that's partly what made the mess of partitions on my two disks (seems to me). I installed ...
4
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1answer
669 views

rsnapshot LVM fails to remove snapshot volume

I am using rsnapshot on a Debian Wheezy server. This was recently upgraded from squeeze. Since the upgrade, I am getting the following error from the hourly cron job: remote rm -rf ...
4
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1answer
137 views

Logical Volume Recovery

I have a machine with 180 or so logical volumes as well as an OS partition that were wiped out with a format when reinstalling centOS6. I made a terrible mistake, not being familiar with the interface ...
4
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1answer
513 views

EC2 disk goes to 100% util, but fine after reboot

We've been running some production services on Amazon EC2 for a while, using mainly t1.large and t1.xlarge instances (non-EBS). Every so often one of the attached (ephemeral disks) will get into a ...
2
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1answer
35 views

How do I specify what PVs are used for mirroring when adding a mirror in LVM to an existing LV?

I've got an existing VG containing a single LV on a RHEL server that consists of a handful of SAN disks. In an effort to migrate the server to a newer SAN, I'd like to mirror the existing storage to ...
2
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1answer
80 views

Expanding RAID6 with LVM

My question is a bit broader than the question title, but here is my situation: I have Synology Hybrid Raid (SHR) built on 2 x 2TB drives. I want to migrate to a software-RAID on a homegrown linux ...
2
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1answer
78 views

Is it possible to create metadata only snapshots with LVM?

Using dm thin I understand it is now possible to store the metadata separately from the snapshot itself. Does anyone know if it would be possible to create metadata only snapshots which do not incur ...
2
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1answer
875 views

clvmd problems during the RHEV cluster deployment

We are deploying Red Hat Enterprise Virtualization cluster and we faced a problem attempting to start clvmd service after the lvm partition creating. The following has been completed successfully: ...
2
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1answer
55 views

Why the I/O rate difference between an LV and PV?

I have been doing some benchmarks reading with dd from both the LVM device and the PV device and I got some unexpected results: $ sync ; echo 3 > /proc/sys/vm/drop_caches; dd bs=1M count=1024 ...
2
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1answer
220 views

LVM+MongoDB. Dropping in speed of backup creation

Till recent time we have been making mongo backups archiving LVM snapshot on hidden SECONDARY server with RAID10 on SAS disks. Currently operation on making snapshot from volume with 500 Gb of data ...
2
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1answer
107 views

LVM2 volume group lost

I updated one of my servers, but - although I took care not to modify - the volume groups on /dev/sdb1 were lost, although the physical volumes seem to be still there: [root@server ~]# pvscan PV ...
2
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1answer
448 views

can't recover LVM volume: Please specify a *single* volume group to restore

I'm trying to recover a deleted LVM volume but can't see to get the syntax right. Running the following command gives me a list of backed up LVM volumes: root@usaxen02:[~]$ vgcfgrestore -l ...
1
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1answer
25 views

/usr/sbin/thin_check: execvp failed: No such file or directory

Running CentOS 6.5, a brand new "minimal" server install, trying to use LVM2 thin pool feature. Packages installed are: lvm2 (2.02.111) device-mapper-persistent-data-0.3.2-1.el6.x86_64 ...
1
vote
1answer
200 views

How to automatically increase the partition size of multiple Ubuntu nodes in VMware vSphere?

We have dozens of Ubuntu nodes where I have to resize the hard disk drive to different sizes. Currently I’m doing all of the following steps manually: Increase the size of each node’s virtual hard ...
1
vote
1answer
483 views

In a distributed filesystem like MooseFS or XtreemFS, should individual nodes expose “raw-er” storage, or LVM'd storage?

When preparing an infrastructure to utilize a distributed storage system like MooseFS or XtreemFS, how should individual nodes present storage to the rest of the environment? Is it better for ...
1
vote
1answer
79 views

Encrypted partition on Debian requiring multiple keys to unlock

The title pretty much sums it up, but I want to create a second data partition on a web-facing server which is encrypted and requires two people to provide passphrases before it can be unlocked. Is ...
1
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1answer
189 views

Breaking off /tmp using LVM

I've recently been put in charge of a RHEL6 server running our NMS. I don't know much about Linux filesystem administration. What I'm needing to do is create a partition for /tmp, instead of having it ...
1
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1answer
53 views

identical drivers different pv size

i've got strange situation with identical drives: pvdisplay --- Physical volume --- PV Name /dev/sda5 VG Name group1 PV Size 465.52 GiB / not ...
1
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1answer
110 views

Does Ubuntu 12.04 LTS support booting from RAID 6?

I'm setting up a new Ubuntu server using 12.04.2 LTS. I have five drives that I am setting up in a RAID 6 with LVM. Can I use this for bootup? Or should I make a separate RAID 1 partition for bootup ...
1
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1answer
314 views

Exporting Volume Group From One Server To Another Difficulties

I'm attempting to migrate a volume group from one Ubuntu 12.10 server to a new Ubuntu 12.10 Server(upgrades). My existing VG is spread across 3 physical drives, and within the VG is 2 logical volumes. ...
1
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1answer
440 views

volume group disappeared after xfs_check run

EDIT** I have a volume group consisting of 5 RAID1 devices grouped together into a lvm and formatted with xfs. The 5th RAID device lost its RAID config (cat /proc/mdstat does not show anything). The ...
1
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1answer
262 views

high load and OOM-killer on domUs while pvmove

Situation xen 4.0.1 dom0 (debian squeeze) domUs all with LVs as disks: disk = [ 'phy:/dev/vg-00/domu-swap,xvda1,w', 'phy:/dev/vg-00/domu-disk,xvda2,w' ]) one VG (vg-00) with 2 PVs Goal Move all ...
1
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1answer
607 views

Assembling Software RAID in Live CD for data recovery

I need help recovering some data that's on my RAID which is on a LVM on my server running Ubuntu. What happened was I deleted the logical volume that controlled my swap space which was on a partition ...
0
votes
1answer
17 views

Using System-Config-LVM in CentOS 6 results in a corrupt filesystem

I am used to being able to use the system-config-lvm utility in RedHat Linux (I was using RHEL 5) to resize the LVM while the system was running. To be clear, I did this while running on the disk I ...
0
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1answer
73 views

Centos disk space allocation

My internal server is running out of space. I want allocate some of the space from lv_home over to lv_root. I have checked the following link: Centos 6.3 disk space allocation. It has few commands ...
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40 views

mkfs.gfs2 failing silently on centos7 cluster?

I'm building a test cluster using centos7 and pacemaker, with shared storage on GFS2 over clustered LVM. I've set up a 2-node cluster, dlm and clvmd, both nodes can see the clustered logical volumes. ...
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0answers
39 views

lvm disk corrupt after force power down

I have virtual machine running on kvm host. But after force shutdown (unplugged power supply of physical server), virtual disk corrupted, cannot boot to OS (OS: CentOS 32bit, include 2 partition, ...
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0answers
12 views

Launch EC2 instance with Logical Root Volume

I need EC2 instance on Amazon Web Services with CentOS 6.5 where the root partition will be Logical Volume. Is there some specific AMI or some available option for choosing before launching the ...
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0answers
30 views

does the number of lvm logical volumes affect ssd performance

Please let me know what your thought are on this. I've installed Ubuntu multiple times on a msata ssd mS200S3 120GB. There is a noticeable decrease of read performance on the exact same hardware for ...
0
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0answers
28 views

Failed RAID 1 drive in a logical volume - lost cause?

I have a non-critical CentOS 6.5 server with a rather quirky disk setup: The main logical volume (mounted as /) comprises two RAID 1 disk pairs, so it's made up from md1 (2TB) and md2 (1.5TB). ...
0
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182 views

EC2 instance with partitions for /boot as ext4 and root / as lvm possible?

I've been playing about with this for a few days now. I haven't managed to find an example of someone running an EC2 instance with the root volume partitioned to have /boot on ext4 (or 3 or 2) and ...
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56 views

sar -b reports much too high statistics, are the I/O counted twice?

On a Linux server sar -b reports much too high read block statistics, sometimes 3.500.000 readb/s peak and around 2.500.000 readb/s sustain, which makes more that 1 gigabyte/s (according to the sar ...
0
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0answers
189 views

Resize a logical volume of an LVM inside another LVM (Xen Dom0)

I have a Xen guest, which its main disk is on an LV (let's call it "domu-disk", VG name "xen"). It's on one single 1T drive at the moment. Inside that domu-disk, it was partitioned into one primary ...
0
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135 views

swapoff running forever on LVM volume

I'm currently trying to resize my swapspace on a Proxmox VE server with LVM volumes, as I'm running out of space for LVM snapshots and the swapspace is fairly oversized: root@rb-srv-gus:~# free -m ...
0
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0answers
85 views

LXC setup with multiple LVM-backed disks

I'd like to set up an lxc container on an ubuntu host with multiple back-end disks. At least two: /boot / /opt, maybe Is there a way to, in one lxc-setup command, to accomplish this? Below is ...
0
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124 views

Changing XenServer from LVM SR to EXT SR

I'm trying to setup openstack using this page: https://wiki.openstack.org/wiki/XenServer/PostInstall Unfortunately I think when I setup xenserver it setup the local SR as LVM (which the page above ...
0
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454 views

Optimizing disk performance on KVM VM configuration

I have a KVM host server running Ubuntu 12.04 LTS, bare bones installation with only KVM installed. The server has an 8 Core Intel(R) Xeon(R) CPU E3-1230 V2 @ 3.30GHz CPU with 32GB of RAM and SATA ...
0
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559 views

Any disadvantage of running a virtual machine using files for its drives hosted on freenas/zfs?

I recently got tired of the really slow I/O reads and latency (10-30 MB/s read, not sure for latency but very slow) from a provider I rent a virtual machine from. He uses freenas, the virtual machine ...
0
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0answers
90 views

how to fix a PV in LVM without uuid in a new linux?

I have a server which its first hdd was broken , the server has 2 HDD , the first hdd crashed . datacenter replaced it for me with a new hdd. the second hdd used to have 2 PV on 2 partitions , and ...
0
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0answers
133 views

Ubuntu 12.04 multipath boot device with LVM

I'm bootstrapping Ubuntu nodes using cobbler, with a predefined preseed. Due to a bug in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/959749 it doesn't work too well to install on a ...
0
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0answers
72 views

lvextend onto a ramdisk or tmpfs

I want to be able to run system image backups of my root partition without downtime. I've read that I can use LVM snapshots and dd to create such images, but my current lvgroup has no unallocated ...
0
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0answers
259 views

VDI size limited to 2TB in Citrix XenServer 6.2

I would like to know if it's possible to create a VDI greater than 2TB with Citrix XenServer using LVM over iSCSI. This limitation is not viable in a virtualized repository server. There's any ...
0
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0answers
63 views

LVM - after server reboot data changes of last 6 month lost

I have a server setup with a Proxmox VE on LVM groups. Today I could not kill some processes, so I decided to reboot the server. This did not work eighter so I had to press the reset button. After the ...
0
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0answers
1k views

KVM LVM-based guest… kernel: Buffer I/O error on device. Failing drive?

Currently setting up a small KVM host to run a few VMs for a small business. The server has 2 drives in software md RAID 1, then I have it set as a PV in an LVM setup. Guests and hosts are all CentOS ...
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110 views

Speed up lvm2 mirroring process

(As a LVM2 noob) I have converted a linear volume to a mirror, now it is slowly (iostat says around 7/sec) mirroring everything over. Can I speed up the mirroring process by adapting some tunable? ...
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0answers
312 views

Raid superblock missing on single partition. Recovery needed

Ok so I have a 2 TB raid 1 setup that has three partitions: sdc1: linux sdc2: swap sdc3: LVM for data However the LVM will no longer mount. So I thought that I would take the spare drive, mount it ...
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0answers
81 views

How to install a Debian on the remote Server with running Debian alreadz?

There are many tutorials (e.g. the main I think: D.3. Installing Debian GNU/Linux from a Unix/Linux System), how to install a new Debian from one another. But they all sounds for me like you need a ...
0
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0answers
190 views

Why does Xen fail to create domUs/start the virtual network interface?

I have received two errors while trying to create a new domU on Xen. First, I received this error: Unable to complete install: 'POST operation failed: xend_post: error from xen daemon: (xend.err ...
0
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0answers
110 views

Trouble resizing LVM volume after expanding Areca 1280 RAID 6

My problem is very similar to Trouble resizing LVM volume after expanding Areca 1220 RAID 5 array; however, my 2 LVs are created on a unpartitioned raid volume: # pvdisplay --- Physical volume --- ...
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21 views

Expansion of a mountpoint shared as nfs to other servers

We have a mountpoint shared as nfs to other servers. Can this be expanded online using lvm? Do i need to unmount the nfs share in clients inorder to expand this mountpoint. Note: ALL OS is RHEL4.9