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)

1
vote
2answers
21 views

LVM: How to re-use unwanted logical volume space on an existing volume

We have this old CentOS4 box and I am trying to increase the space. I want the full 8GB to show up in a "df -h" but it shows only the first Volume of ~4GB. How can I add the 2nd volume to the first? ...
0
votes
0answers
5 views

LVM Disk Fault Correction Issue [migrated]

I've been having some problems with my LVM disk array. First off i was suspecting a failing hard disk smartctl /dev/sde # 1 Extended offline Completed: read failure 90% 4861 280578 # 2 Short ...
-1
votes
1answer
28 views

how to clone a VM on LVM to another in KVM?

On a Debian wheezy i installed KVM for virtualization and install some VMs on it. I use separate LVM disks because of its performance for my VMs disk. Now i need to clone one of them in new LVM disk. ...
5
votes
1answer
73 views

Are ZFS pools or LVM volume groups more reliable for utilizing many partitions?

When deciding whether to use LVM volume groups or ZFS pools in configuring new file servers, what needs to be considered? Is there a "better" choice in the realm of multi-purpose file servers? Unlike ...
1
vote
1answer
33 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 ...
0
votes
0answers
22 views

Can traditional partition and LVM coexist? (RHEL6) [duplicate]

There are 2 disks which are configured as RAID1. I want to set system area (/boot, /, swap) as normal partitions. And I think those areas for Applications and Data should be LVM because they might be ...
2
votes
1answer
48 views

Increase disk space in a VM using LVM : Best practices?

When you have virtual machines, the size of disks can be changed, and specifically, increased. That makes the problem of resizing LVM a bit more complex than on a physical server. There are three ...
0
votes
1answer
22 views

dd output file larger than input file when executed with conv=noerror,sync

I am trying to backup an LVM on one of my servers with the following command: dd bs=4M conv=noerror,sync if=/dev/vg_volgroup/LvmName | ssh myuer@myip "dd of=/home/myuser/LvmName bs=4M ...
3
votes
1answer
30 views

LVM in Linux with fdisk?

This question is similar to Is the fdisk partition type important when using lvm however will ask it for clarity. On a CentOS 6.5 insall, I accidentally took a new 3TB virtual disk and performed the ...
0
votes
0answers
29 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 ...
1
vote
1answer
19 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
vote
0answers
10 views

reusing existing raids on preseeded instalation

I'm trying to automate reinstall process of existing ubuntu installation. partition layout : md0( raid1, /dev/sda1#/dev/sdb1 ) - swap (2G) md1( raid1, /dev/sda2#/dev/sdb2 ) - / (20G) md2( raid1, ...
0
votes
0answers
40 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
votes
0answers
13 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 ...
2
votes
1answer
36 views

How important is PE Size for KVM virtualization?

How important is PE Size for KVM virtualization ? Some people say that is useless to follow SolusVM instructions for KVM by setting PE Size from default 4M to 32M.
0
votes
0answers
12 views

How to shrink encrypted lvm? [duplicate]

I have a LV. on top of LV there is a luks volume and on top of luks there is an ext4. I already shrunk the ext4 and now i don't know how to correctly shrink luks and LV not to loose any data. how to ...
1
vote
0answers
54 views

Migrate CentOS VM using LVM on IDE to run with VirtIO

I'm trying to migrate existing IDE-using, LVM-based CentOS 5.2 VMs to use virtio. The symptom is a kernel panic upon boot when the system can't find any volume groups. Does anyone know how to make ...
0
votes
1answer
42 views

size of extent on LVM2

in LVM1 there was a limit of 65k extends. So size of extent had to been chosen carefully between wasted space on partitions (to big extent) and maximal possible size of logical volume (too small ...
1
vote
0answers
23 views

reclaim space from xen server

i found xencenter stotage => general tah display 1096.6 GB used of 1107.7 GB total (708.5 GB allocated) seen some space have been eaten and not release. the SMLog show that [13816] 2014-03-28 ...
0
votes
1answer
14 views

Very high load during pvmove in domU

I had a pretty bad time this evening. I had to move LVM2 LVs from one PV to another (source PV backed by NFS stored vdisk, target PV backed by an iscsi LUN). Moving small LVs of ths VG (few gigabits) ...
1
vote
1answer
43 views

How do I remove a locked Logical Volume ([pvmove0]) left over after a disk error?

Following some disk errors while I was moving some extents, I now have a hidden locked [pvmove0] which doesn't seem to have any physical extents assigned, although it is 4Mb long! # lvs -a ...
2
votes
2answers
46 views

Should I really leave some space unused with LVM partition?

I am migrating to a new server where I'm going to use LVM partitioning on a RAID 1 array (2 hard drives). I have read some tutorials which advise to leave some space unused so that I can expand the ...
2
votes
1answer
104 views

Do I need to enable LVM at install time?

I'm setting up a CentOS dedicated server and I would like to use LVM (it's the right thing to do, isn't it?) The thing is, I'm not sure if I have an option to enable LVM at the time of installation. ...
2
votes
1answer
26 views

How use free space after lvremove

I have a server with multiple logical volumes. I deleted one, but I can not make use of the free space. root@ubuntu:/tmp# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert logs ...
3
votes
2answers
99 views

LVM snapshot of btrfs volume changes mounted device

I have a btrf volume on top of LVM. Now I want to do a snapshot on the lvm level (NOT on the btrfs level). But every time I create the LVM snapshot, btrfs changes the mounted block device to the ...
0
votes
1answer
27 views

Format and partition device-mapper in LVM

I have a disk on a server: /dev/VolGroup00/LogVol02 that is about 5TB. I would like to format and partition it to make 2 500GB mount points. It doesn't even have to be in LVM. How can I take this ...
2
votes
1answer
44 views

Amazon AWS: Can I attach volumes at runtime?

I can attach volumes in the AWS Web Console by going to Volumes and attach it to my instance. Unfortunately the Linux Server does not react to this addition of the volume. Nothing appears in dmesg, ...
1
vote
0answers
90 views

Debian Preseed use whole device for LVM Physical Volume

I have the following recipe for a preseed install (truncated for readability): d-i partman-auto/expert_recipe string \ boot-root :: \ 1 1 1 free \ $iflabel{ gpt } \ $reusemethod{ } ...
0
votes
1answer
19 views

started removing a physical volume from an LVM from webmin. how can I see the progress?

so I recently added a 2TB physical volume (PV) to an LVM volume group (VG) with the sole purpose of removing another 2TB PV from the VG. Everything is carried out from webmin. So once the extra PV ...
1
vote
0answers
59 views

SSD+MDRAID+LVM+KVM results in lower performance than expected

We use kvm for virtualization, the disk images are stored as logical volumes. The logical volumes are stored on a bunch of software-RAID1 (mdadm) arrays composed of Intel DCS3500 SSDs (each array is a ...
0
votes
1answer
75 views

Grub install failing on Hardware RAID with LVM

I have a SuperMicro box with an Areca RAID controller installed. The RAID controller is configured for RAID 6 + Hot Spare. I am attempting to install Ubuntu 12.04 LTS. I set up LVM with separate ...
2
votes
0answers
26 views

Does the LVM DM UUID contain any metadata?

For example within the name listed below is there any metadata within the name, eg based on server serial number or date created or such: ...
0
votes
0answers
29 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
votes
1answer
52 views

ext4_orphan_cleanup errors on LVM

I'm running a server with Debian 7.2 on a RAID 1 with two drives with LVM on top and I keep getting these messages in my syslog. Should I be concerned? Is this a bug? What could it be deleting? Feb ...
2
votes
0answers
27 views

Change the logical volume

I am quite new this snapshot process. Let, I have three logical volumes as A, B, C. I worked on logical volume C. But accidentally when I restart the system, it goes to the snapshot A. How can I ...
-3
votes
1answer
36 views

Xen doesn't boot after install [closed]

I tried to setup Xen by the instruction released on the site of my hoster. I installed Xen, completed RAID setup as it is told in the instruction. Rebooted and succesfully connected to Xen from ...
1
vote
1answer
68 views

Linux Server OS on LVM on Software RAID: Best Practices and Considerations

I am preparing for a minimal Ubuntu Server 12.04 LTS that will simply run libvirt/KVM to host a handful of Ubuntu Server 12.04 LTS guests. On my KVM host I created a RAID 1 comprised of two physical ...
0
votes
1answer
42 views

Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?

I'm preparing a Dell R520 PowerEdge server with 8x 1TB disks as a data archive/warehouse (file, RDBMS, NoSQL) server. Out of the box, the PERC H710P RAID controller was configured with 3x 2TB RAID6 ...
0
votes
1answer
25 views

Migrate multiple LVM volumes for KVM guest to image

I want to move some KVM guests to VMWARE and therefore have to create VMDK images of the disks. The virtual disks for the guests are spread around multiple LVM volumes. There are a couple of pointers ...
0
votes
3answers
48 views

Setup replication from one local disk to another local disk ( Ubuntu )

Is there is are some way to setup local replication of the one disk to the another ( Ubuntu ) in the such way that all read operations will be involve only first disk ? Such configuration will be very ...
0
votes
1answer
29 views

Recovering LVM RAID-1 on different computer with only one drive?

I have a drive out of an old LVM RAID-1 that's been sitting for a while. I think the array contained a bunch of my photos from years ago (archived online) but I'd like to get at the original data and ...
2
votes
1answer
45 views

How can I resize my logical volume in CentOS6?

I increased the provisioned size in the Vsphere client to 32GB and I used gparted to resize the VG to 32GB --- Physical volume --- PV Name /dev/sda2 VG Name vg_proxy ...
1
vote
1answer
43 views

Does 'lvremove' destroy data?

I assign a LV for each vm guest. When deleting a vm, I remove the corresponding lv running 'lvremove'. But is it necessary to destroy the data before running 'lvremove'? Does lvremove do the work of ...
0
votes
1answer
90 views

Unable to automatically remove LVM data

I am trying to install ubuntu 12.04 via preceed config onto Dell PowerEdge R710. I had RedHat installed on the box then I tried installing ubuntu 12.04, then auto install popping with Unable to ...
1
vote
1answer
605 views

Ubuntu 13.10 - How to disable LVM and cryptsetup? cryptsetup: evms_activate is not available

I am trying to remove whole drive encryption from my Ubuntu installation. I've run Ubuntu from Live CD, mounted crypt partition and copied it to another partition /dev/sda3. sudo cryptsetup luksOpen ...
1
vote
0answers
33 views

Attach Multiple disk LVM from old Xenserver to new Xenserver

hope you can help me with this one... We have a Xenserver 6 with 4 320 Gig disks as a one LVM Volume Group. Suddenly past friday one disk failed and we were unable to start the server. I have tried to ...
2
votes
1answer
18 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 ...
0
votes
1answer
86 views

Is it a good practice to put all partitions into LVM? [closed]

I would like to know what is the best practice regarding the partitioning policy, especially when it comes to Logical Volume Manager. Is it better to put the entire partitioning into LVM or use it ...
1
vote
0answers
84 views

Need help recovering RAID 6 array

My CentOS 6.5 server had its primary drive fail the other day. Our hosting company replaced the primary drive and reinstalled the OS. The system is up and running, but the 15TB of RAID6 storage isn't ...
1
vote
4answers
99 views

Best Linux Partitioning for Multiple Resizeable HDD

My ISP has a machine with 6 HDDs (3TB+3TB+3TB+2TB+2TB+1TB) which we want to turn into a FTP/Download server for local users. I am planning to install CentOS 6.5 on one 2TB, rest of all space shall ...