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 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 ...
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42 views

How to find out if lvm mirror write is asynchronous or synchronous?

I am using redhat 5.8 with an lvm mirror, created with the following command: lvcreate -m1 --mirrorlog mirrored -n mirrorvol -L 10G myvg /dev/vdb /dev/vdc I would like to know, when I write, do I ...
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22 views

task fstrim blocked for more than 120 seconds

I'm experiencing random crashes on my system. I've narrowed the problem to the fstrim program that's launched weekly by cron. In the console, I've got a set of blocked tasks among whigetch I find ...
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1answer
35 views

Installing boot manager to a raw LVM physical volume

Is it possible to install some boot manager to disk with raw physical volume inside (i.e. no partition table)? I tried LILO and LVM volumes became inaccessible (due to LVM structures corruption). Boot ...
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1answer
68 views

Shrinking or removing home partition in CentOS 7 installation [closed]

I made the mistake of creating a home partition that fills up all my disk space, and it's formatted in XFS, which to my knowledge isn't shrinkable. Since I have no use for the home partition anyway ...
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1answer
24 views

create parition for xen with lvm on raid-1

First I don't have any experience creating xen, lvm and RAID-1 server, thus after several reading I stumbled upon this ubuntu documentation to install xen. BUT, because in the documentation it ...
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3answers
73 views

How to mount Physical Volumes separately which are bound using LVM

I have a VG (volume group) containing 3 PVs (Physical Volumes). Some physical fault has come up in one of the PVs (maybe?). At the attempt of mounting each PV separately, it gives mount: unknown ...
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1answer
44 views

Extending Linux LVM partition

I was following this link to extend a Linux LVM partition on a remote machine, but the Internet connection went out and I don't know if the partition was created. Can you help me determine if the new ...
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1answer
23 views

Increasing LVM to use all free space on virtualbox/debian

I've cloned and resized a disk image for VirtualBox but I can't find a way to use all the new space. this is how I started: fdisk: Disk /dev/sda: 80.5 GB, 80530636800 bytes 255 heads, 63 ...
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1answer
52 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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1answer
129 views

Is there any downtime when expanding a volume on an iSCSI setup using Synology Hybrid RAID?

The subject sums up the scenario. I believe the answer is there is no downtime but the system might simply be slower during the rebuild. Which is fine. But if there is downtime, how long? A small blip ...
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1answer
37 views

lvm and hardware raid: hardware raid 5 and raid 1 in single volume group?

I have a system with pre configured hardware RAID. It has 2 disks in a RAID1 configuration. It has a further 6 disks in a RAID5 configuration. The 6 disk RAID5 is split (by the hardware) to look like ...
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1answer
37 views

LVM RAID10 “Won't be synchronised” - What does it mean?

I was creating an LVM RAID 10 across 4 physical volumes (each 3TB) when I got the following error message: WARNING: New raid10 won't be synchronised. Don't read what you didn't write! My googling ...
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0answers
29 views

fdisk with lvm: Why is first sector at 3072 instead of 2048?

Using ubuntu 12.04, i have a xen-server and several vms. Considering /dev/vm-disks/testes - an lvm volume partitioned during OS install /dev/vm-disks/testes-home - another lvm volume, unpartitioned ...
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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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1answer
57 views

Extend root logical volume for VM with Oracle Linux of VMWare

Please make me sure did I wrong thing, or not. I'm resizing the root partition which is under the LVM. This server is a VMWare's virtual machine with Oracle Linux. I'm using this article: ...
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1answer
559 views

Xen lvm resize2fs: Bad magic number in super-block

First of all i have to say i've been looking through lots of posts very similar to what i have but none could solve my problem... In my xen server i use 5 lvm disks per virtual machine: /boot / ...
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1answer
34 views

Intelligent Volume Management [closed]

I'm looking for a software solution that could present a single disk volume to me that's backed by some sort of intelligent disk manager. In my ideal use case I'd be able to create the volume from ...
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110 views

LVM mirror attempt results in “Insufficient free space”

Attempting to add a disk to mirror an LVM volume on CentOS 7 always fails with "Insufficient free space: 1 extents needed, but only 0 available". Having searched for a solution, I have tried ...
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1answer
17 views

Debian Installer Partman and reserved blocks

I did this preseed configuration but I'm unable to remove the percentage of reserved blocks directly from the partman recipe. It seems that the option "partman-basicfilesystems/specify_reserved" is ...
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2answers
52 views

Mounting disk partition inside LVM

I have a logical volume what's used for a xen disk: Disk /dev/d0_vg/backup: 10.7 GB, 10737418240 bytes 1 heads, 1 sectors/track, 20971520 cylinders, total 20971520 sectors Units = cylinders of 1 * ...
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22 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 ...
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1answer
94 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 ...
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1answer
227 views

Moving LVM volume group from one physical disk onto another

I'm an out-of-my-depth PHP developer who has to deal with the following sysadmin problem, pronto. We have an Ubuntu (Ubuntu 14.04.1 LTS) server run Xen (xen-hypervisor-4.4-amd64 4.4.0-0ubuntu5.1). ...
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27 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). ...
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1answer
41 views

Multi-Volume data storage without striping

I have a network storage server running Debian, containing multiple hard drives. These drives are all mounted into subdirectories of a samba-shared folder. All members of the network have full read ...
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1answer
99 views

Restore from XenServer LVM ddrescue image

the disks in my xenserver are dying. I could rescue some of the lvm volumes with ddrescue. Now I setup a new xenserer and I wonder how to restore from the rescued images. Anyone has experience with ...
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1answer
86 views

How can I grow an ext4 filesystem inside a dm-crypt/LVM volume?

I have a disk with this format: sdc 8:32 0 1,8T 0 disk └─sdc1 8:33 0 1,8T 0 part ├─vg-lv1 (dm-0) 254:0 0 900G 0 lvm ...
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104 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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1answer
354 views

How do you repair a Ubuntu 14.04 RAID-LVM-DM-CRYPT-LUKS Physical to Virtual system that won't boot?

I can't get a Ubuntu 14.04 Virtual server to boot correctly. It's recently been cloned "dd if=/dev/sda of=vmimage" The Physical has a RAID1-LVM-DMCRYPT-LUKS configuration, The boot sequence aborts and ...
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787 views

sed fix for BusyBox - boot fail unable to mount LVM

BusyBox why u no vi?! Summary: Ubuntu 14.04 Server after upgrade first boot, only boots to BusyBox v1.21.1 initramfs with "gave up waiting for root device" due to missing /dev/mapper/xxx-root as ...
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2answers
150 views

Reassemble RAID 1 array from old system

I recently upgraded my OS from RHEL 5 to 6. To do so, I installed the new OS on new disks, and I want to mount the old disks. The old disks are listed as /dev/sdc and sdd in the new system, they were ...
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45 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 ...
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1answer
59 views

LVM - Moving data between Logical Volumes within the same Physical Volume

I will have two logical volumes that exist within one physical volume (RedHat Linux LVM). I will also be moving a lot of data between these LVs. My question is: Does the data get moved on the actual ...
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1answer
84 views

Error creating LVM snapshot: Module dm_snapshot not found

I've installed via apt-get lvm2: (precise)root@localhost:~# apt-get install lvm2 Reading package lists... Done Building dependency tree Reading state information... Done The following NEW ...
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19 views

lvm mirror doesn't resync the logical volulme

I trying to restore one lvm mirror using the old metadata, for restore the config i'm using the command vgcfgrestore -f redhat vgmirror but after the restore of the old metadata, the resync ...
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287 views

ZFS RAID0 pool without redundancy

I created a ZFS pool on Ubuntu 14.04 without specifiying RAID or redundancy options, wrote some data to it, rebooted the machine and the pool is no longer available (UNAVAIL). I don't have the exact ...
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135 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 ...
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1answer
44 views

Logical volume attributes

I've used lxc-clone command to clone my lvm-based container (test_lvm was copied to create u33). Container works fine, but the output of sudo lvs confuses me: LV VG ...
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1answer
112 views

KVM : VMs need several restarts to boot (on 2 different hosts)

I'm using a KVM hypervisor on a Ubuntu Server 12.04 server. My virtual machine's virtual disks are LVM volumes, formatted as ext3. The guest OSes are all Ubuntu 12.04 and 14.04 server. Everything ...
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88 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 ...
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1answer
57 views

Online resizing of kvm guest root filesystem?

I have a Linux guest that uses an LVM volume directly as root file system (that is, there is no partition table). libvirt config looks thus: <os> <type arch='x86_64' ...
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2answers
73 views

Impossible remove Logical Volumes or Volume Group LVM2 [closed]

After a disk crash part of a LVM group, I can't use LVM2 properly. If like delete a Logical Volume impossible (Error on SATA Volumen) lvscan Couldn't find device with uuid ...
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63 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 ...
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0answers
29 views

Recover lost volume group in hp ux 11 v2

The disk containing operating system (vg00) has failed. I tried to install the operating system on a new disk and I want to restore other volume group (vg01 and vg02) on two disks that contain data.
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94 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 ...
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1answer
80 views

How do I replace the root filesystem (ext4) with a new one in LVM with one which has more inodes?

I have a few systems which have been running over a decade in a cluster on SLES 10 (now long past EOL). We're migrating to CentOS 6 64-bit. I got everything done but the final data syncs, and lo and ...
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1answer
94 views

Redundancy: LVM+mdadm or LVM internal RAID

The task is to create LVM storage for virtual machine images. So LVM will be used in any case. There are two ways LVM providing redundancy: block mirroring lvcreate -m 1 --mirrorlog mirrored -n ...
2
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1answer
56 views

LVM physical volume priority

Linux LVM can combine several physical volumes in one group and when spread space of this group among logical volumes. If some slow devices will be added to group it may slow down all logical ...
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192 views

How to increase KVM guest disk size using LVM VG as storage pool?

The KVM host server is running CentOS 6.5 and a LVM volume group "storage_pool" is used as the main storage pool for KVM. An Ubuntu guest is installed using an ext4 filesystem and mounts the whole ...