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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Need clarification on what lvm snapshots are and how they work

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 ...
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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 ...
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21 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 ...
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15 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 ...
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10 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: ...
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72 views

Create file system on multipath volume

I'm completely new to linux admin and file system. Recently we acquired an HP MSA P2000 san. I've setup the disk into a vdisk and created 3 volumes on it. On Centos 7, I've also setup the multipath ...
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The RAID 1 Time machine

Last night my server crashed, after reboot I have found it has a disk failure The configuration is 2 x 500GB sata on Centos 6 sda3/sdb3 is software RAID1 sda1/sdb1 = ext3 for / sda2/sdb2 = swap ...
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V2P - Using Clonezilla with VMware - but I have two virtual disks

Don't ask me why but I've been requested to V2P a VMware machine. I'm using Clonezilla and a couple tutorials online. But, my VM has two virtual disks (screenshot). Currently in the process, but if ...
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issue in increasing disk size in ubuntu guest vmware

Have followed link I was trying to increase the size of my disk allocated to ubuntu guest in vmware below are the things i have already done Increased max setting in vmware settings - Done ...
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2answers
60 views

Cloning LVM partitions

I need to clone a CentOS installation from a 1TB disk partitioned with LVM, to several identical machines. The disk is mostly empty since only the operating system and some software are installed and ...
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19 views

How to hot add a new disk with virsh attach-disk?

I'm trying to add a new LVM disk to my guest machine (Ubuntu 14.04.1) by doing the following on the host: lvcreate -L 14G -n vm_vm005_data3 vg00 virsh attach-disk vm005 /dev/vg00/vm_vm005_data3 ...
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I've just increased the disk's size but the old size is still display, what could be the cause and how can I fix it?

I need to increase the size of the root logical volume on one of my CentOS 6 virtual servers. I've extended the virtual machine disk space from 16g to 30g. Then I've connected to the machine and ...
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26 views

Why is nfs server not seeing resized filesystem size?

On the NFS server, when I extend the the logical volume (using lvm2) and subsequently the ext4 fs on top of it (using resize2fs), I'm able to see the new size locally with df. But the NFS clients ...
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1answer
29 views

df is reporting wrong information in an LVM

I had a full disk usage on /var/log (100%) and deleted a few files to increase space. this is and ext4 partition mounted with default options. However, when I df -h I get: Filesystem ...
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1answer
56 views

Extending partition on centos 6

I have a VPS which appeared to lack some space somewhere. It should've been 150GB but was only 50GB. I've been trying to extend the partition but I can't seem to find out how even with the help of ...
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1answer
31 views

creating new partition for backup

I got a new server form hosting company. It has 2x2tb hard drives. I told the provider I would be using one drive for data/OS and the other for backup.Before doing offsite backup. I moved all my ...
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3answers
37 views

Logical Volume 100% Use but 50G Appears Free

I am resizing logical volumes on a CentOS server and I have come across an issue where the volumes say that they are 100%, though the "Size" and "Used" columns seem to indicate that there should be ...
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1answer
9 views

Listing all logical volumes in LVM2 that are snapshots

I have a logical volume that has snapshots where the lv name has the date in it. I'm trying to locate that snapshot using lvs and i'm getting close but can't figure out how to list logical volumes ...
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27 views

mdadm and LVM high load and IOwait

I've got a new CentOS 6.6 server with 2 HDD with mdadm & LVM. As I've used the CentOS install CD I assume everything should be aligned properly. I've just written a KVM image to a LVM LV using dd ...
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1answer
58 views

Steps to move an ubuntu 14.04 server install disk (damaged) with lvm to a new disk on the same system

Need some clarification on how to move the following : I have a Ubuntu 14.04 server install with LVM and its disk was failing. I have managed to clone the disk without any errors to a new disk of same ...
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1answer
32 views

Mounting Single San Drive on Multiple Hosts

I'm not sure exactly how to ask this, but here goes. We have a san. Within the san, we have the ability to connect a single volume to multiple systems as a raw disk. The Servers themselves would see ...
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37 views

Adding new physical volume in encrypted volume group (LUKS)

I have a CentOS 6.6 desktop and chose the encrypt option upon installation. This created a LUKS volume group. Everything works fine, but I want to add an additional drive to the volume group. From ...
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53 views

how to identify which physical drive(s) correspond to an entry in /etc/fstab [duplicate]

Using Centos. Situation: I have multiple drives off of two RAID controllers. I also have multiple entries in the fstab, such as /dev/sdb, /dev/sdc, etc. What I need to know is how I can identify ...
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93 views

Extending LVM Volume Groups with Physical Extents & pvresize

I have two somewhat related LVM questions regarding extending LVM managed volumes. Firstly, from (edit: old) documentation that I've read about LVM and the relationship between Volume Groups and ...
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77 views

NFS stop working when on a lvm

I have a nfs server that was working correctly with a share on /exports/something. However, when I mount /exports/something on /dev/mapper/something (a lvm with more space) the nfs does not work. The ...
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48 views

Optimum LUN size for LVM created NFS share

I have access to roughly 80 TB of capacity via a SAN, which I want to set up as as 2 NFS shares: 1 share of 70 TB and 1 share of 10 TB. The 10 TB share will have full backup to tape, whereas the 70 TB ...
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1answer
100 views

Backup kvm Virtual Machine with lvm

I'm new to virtualization and have been searching for a while for a flexible disk format for setting up a kvm VM, after some reading i decided to go with lvm. And did set up the disk and the ...
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51 views

Ubuntu 12.04 and Hardware RAID 5 and LVM

I have an existing database server setup with RAID5 (3pcs 1 TB disk - usable is 2TB). One of its partition is /data is LVM. There is production data already in the First RAID 5 so we opted to create ...
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1answer
31 views

Combining partition types lvm

I have an older disk setup that was made with msdos parition types and it appears that they kept growing the same disk in order to grow the lvm however it ran into an issue where it got to 2TB and ...
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42 views

Mount LVM volume as external usb drive?

I'm trying to mount my old 2x500GB drives to the new server which has the same drive volume. Both have LVM structure but it's not working. root@server [/mnt/usb]# ls /dev/sd* /dev/sda /dev/sda2 ...
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How can I create one large partiton over two drives in CentOS?

I've got a new dedicated server that I want to use purely for backup purposes. [root@dedi ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 20G 942M 18G 6% / tmpfs ...
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48 views

How can I tell pvresize to expand a physical volume to include all available space?

We have a poorly implemented mysql server that had been built by a vendor. It has consumed 100% of available disk space, and as soon as any space is cleared out mysql grows to consume it. This is, ...
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59 views

LVM Free Disk Space

I have a MongoDB running on a virtual server (Ubuntu 14.04.2 LTS). The MongoDB logs say this: Fri May 8 13:08:02.270 [initandlisten] ERROR: Insufficient free space for journal files Fri May 8 ...
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1answer
95 views

How to migrate from ide to virtio in RHEL 6.5 KVM guest with LVMs

I want to migrate a IDE-using, LVM-based KVM guest running RHEL 6.5. I found this steps in this page: 1) Run virsh edit . From there, edit the config file and adjust all lines of <target ...
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1answer
85 views

Can you do multiple pvmove at the same time?

I have following case: Server with 4 disks - devices /dev/sdb - /dev/sde. Each of these disks is physical volume, and all of them are within single volume group. In this volume group, I have single ...
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1answer
120 views

LVM Partition being detected as wrong size

There is a server I'm responsible for that is showing a drive (full) and much smaller than the drive should be. My knowledge of LVM is not deep enough to see why. I could use some help from a good ...
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1answer
38 views

Recover overwritten RAID5 array (XOR)

as I've mentioned in a recent question (RAID5 rescue with LVM2 running on it) I'm rebuilding an RAID5 array. Now, I think that the initial wrong mdadm --create ... command has started the ...
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1answer
100 views

RAID5 rescue with LVM2 running on it

I have a RAID5-array consisting out of 6 1TB drives. Recently with hardware changes i needed to recreate the raid to rewrite the bootloader on each drive. Now the problem starts. Starting the Debian ...
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29 views

I added space to a kvm img file but the physical extents do not show up in lvm

I ran qemu-img resize kick.img +12G and thought I'd see some free physical extents when running pvdisplay but nope. When I run virt-filesystems --long --parts --blkdevs -h -a kick.img I see the space ...
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1answer
42 views

Shrinking LVM Volumes

We have a Synology RS3614rpxs NAS head containing (9) 3TB hard drives in a RAID 6 + 1 hot spare. The storage became exhausted and we added an expansion chassis where 5TB hard drivers were installed ...
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1answer
28 views

Storage volume is not avaliable from second node AIX 6.1 OS

My environment comprised AIX 6.1 OS installed over six physical servers and connected via brocade switch to DS8000 SAN storage. I am aiming to build HACMP cluster on two physical machines in a way ...
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1answer
156 views

copy LVM partition to new disk

I have a question about making copy of LVM partition to new disk. I want co copy not to move data. My operating system is Debian. On LVM partition I have running Xen virtual systems. Information ...
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107 views

Booting from LVM without boot partition

I have recently rebooted a server with over a year uptime which was partitioned like this (and of course it never come back, it couldn't boot): Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes 255 ...
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1answer
71 views

How to change the PVID of a device and still be able to import the Volume Group in AIX?

I have 3 disks that are copies of other disks so they have the same PVID's. I would like to change the PVID of those disks and import the volume group but as I understand the VGDA information on the ...
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An ext4 filesystem spanning multiple RAID arrays and calculating alignment parameters [closed]

So I have the following setup: 3x4TB RAID-5 (Hardware RAID) (two data disks) 5x2TB RAID-5 (Hardware RAID) (four data disks) = six data disks in total? These will be encrypted using LUKS and then ...
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94 views

Back up incremental snapshots to another volume

I'm looking for a way to implement something close to the following backup scheme: Initially, a full image is copied to the backup target. Periodically (e.g. nightly), only blocks that have changed ...
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67 views

Can you change raid type on an active server?

I was just dabbling with a few different raid types recently for some performance testing and I was hoping someone could answer this question for the sake of knowledge. Is it possible to change the ...
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2answers
389 views

Linux device-mapper maps LVM PV nested inside LV when taking snapshot

Which is really messing with my plan to back up this machine... I have a server which is a KVM hypervisor to several virtual machines. One of these is running Docker. It has its Docker volumes on ...
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62 views

Data recovery seems impossible after kernel upgrade. MDADM (Raid1) LVM2

I opened a question about rebuilding a bad partition My Problem that din't take me anywhere. Bad news is the company trying to rescue the data says it's finding huge inconsistencies they can see some ...
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1answer
180 views

Disaster recovery. MDADM/LVM2 Some advance but stuck on final mount

We made a stupid upgrade on a running server using wrong repositories and the system became totally unbootable. The system, a SLES 11 we used a openSuse repository to upgrade, and everything went ...