Logical Volume Management provides storage abstraction, a generalization of disk partitioning.

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Is there a distribution with an installer that can automatically do LVM over LUKS with everything aligned as needed?

http://www.void.gr/kargig/blog/2012/01/11/linux-ssd-partition-alignment-tips/ talks about aligning SSD partitions and LVM physical volumes. ...
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Arch GRUB asking for /run/lvm/lvmetad.socket on a non lvm disk

I am running this script based on the ArchWiki setup procedure. It fails on the GRUB configuration step I am using the archlinux-2013.12.01-dual.iso inside VMware Player with 1 GB ram, sda is 810 ...
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16 views

Cannot create lvm snapshot

I've found a proble creating a snapshot, as follows: [root@centos7 ~]# vgs centos VG #PV #LV #SN Attr VSize VFree centos 3 2 0 wz--n- 9,50g 1,99g [root@centos7 ~]# LANG=C lvcreate ...
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Good Bye lvreduce, hello lvresize?

I've found a couple of times that using lvreduce, (first unmounting, shrinking ext4 with resize2fs, and fsck'ing) ends in: mount: wrong fs type, bad option, bad superblock on ...
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329 views

Adding a second hard disk CentOS

I'm running CentOS on my VMware server console, and I want to know how to make a second virtual hard disk on which I can expand the size of the primary logical volume AND and a third to hold two ...
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LVM2 Mirror Support Missing from Kernel after System Migration

I had a system that was running on a small netbook that had LVM2 set up to group two external USB hard drives into a volume group, and to use that volume group to create a mirrored logical volume. ...
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14 views

LVM + LUKS partition - Is this architecture dependent or independent?

I've been recently dealing with an LVM + LUKS partition trying to install a new linux (ubuntu in this case). I tried a few different options to make it work, but the pc resisted, the only system I ...
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RAIDing with LVM vs MDRAID - pros and cons?

In his answer to the question "mixed raid types", HBruijn suggests using LVM to implement RAID vs the more standard MDRAID. After a little investigation, it seems LVM also supports RAID ...
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Can't resize lvm volume “lv_home is in use. e2fsck: Cannot continue, aborting”

I would like to shrink my logical volume for home directory, so that I can extend volume for root. df -h /dev/mapper/vg_mitoscomp-lv_root 50G 33G 15G 70% / /dev/mapper/vg_mitoscomp-lv_home ...
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18 views

How many volume groups can be created in physical volume?

I want to know the details regarding LVM: please provide some link regarding Linux to study and understand it.
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LVM: possible to recover full snapshot?

Accidentally, I have let a LV snapshot created by libvirt/virt-manager run to full. Is there any way I can at least recover (some) data written to the snapshot? Many thanks! lvs ...
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451 views

how to have root partition LVM for RHEL 5.8 64 bit on AWS EC2

I am new to this and I have to create a RHEL 5.8 Amazon Machine Image (AMI) in which the root partition should be a logical volume. I know how to create a data partition as a logical volume but am not ...
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16 views

Removing /home LVM and merging in to /

[root@host.com ~]# pvdisplay -s Device "/dev/sda2" has a capacity of 0 [root@host.com ~]# vgdisplay -s ...
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1answer
34 views

LVM: is this mirrored? is copy this slow?

Background: My Windows Home Server bit the dust - some kind of OS Hang. The drives and hardware were still good; after making sure I had all my data backed up, I decided to investigate Ubuntu and ...
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1answer
968 views

dual booting centos5.5 and fedora

I already have CentOS 5.5 on my system whose hard disk is ~500GB. I have tried to dual boot with Fedora 16. while installing fedora 16 I have created a ~250GB and ~4GB partitions for "/" and swap. The ...
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Does LVM impact performance?

I have to migrate a few servers to Linux, and one important aspect that I need to evaluate is that my new host system must have elastic storage capacity. Naturally, doing some basic research, I came ...
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37 views

Fix LVM physical volume definition after removing /dev/sdb

Recently I set up LVM partition with an new disc /dev/sdc. I created the LVM with the following commands: pvcreate /dev/sdc vgcreate data /dev/sdc mkfs.ext4 /dev/data/srv tune2fs -m 0 ...
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1answer
437 views

Can you create a volumegroup in LVM that all the Logical volumes created under it will be thin provisioned?

I would like to know if it is possible to create a volumegroup in LVM that all the Logical volumes created under it will be thin provisioned? This will be used on RHEL 6 which does include thin ...
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How to restore /sysroot on Fedora 20

I can't boot my Fedora 20 system as usual. Upon boot I get the message Entering emergency mode. Exit the shell to continue. journalctl reveals the following: systemd[1]: Starting Switch Root... ...
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21 views

Error when trying to mount Xen LVM2 volumes

I have a hard drive which used to be part of a server running Citrix XenServer 5.6.100 SP2 with a Software RAID1 (I only have one of both hard drives). This hard drive is now physically attached to a ...
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how can I backup and restore of partitions and logical volumes?

This is my disk scheme sda1 /boot ext4 sda2 /somefiles ext4 sda3: lvm volgroup1/lvolume1 / ...
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87 views

Understanding iostat with Linux software RAID

I'm trying to understand what I see in iostat, specifically the differences between the output for md and sd devices. I have a couple of quite large Centos Linux servers, each with E3-1230 CPU, 16 GB ...
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1answer
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No logical volume groups found, LVM stuck at boot

I'm running Ubuntu 14.04 (64bit). Long story short, I've compiled a custom kernel and now I'm running into some issues with my encrypted hard drive. When I boot my machine and attempt to start the ...
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1answer
155 views

LVM not coming up after reboot, couldn't find device with uuid

Had a VM that was, up until recently working without issue, but needed to be rebooted after some configuration changes. However after rebooting the VM didn't come back up, saying it couldn't find the ...
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262 views

Replace hard drive in ubuntu

I know variants of this question have been asked before, but I couldn't find a specific answer to my situation. So here goes: Running ubuntu server 12.04 with the os on a separate drive and two 1,5 ...
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263 views

Do LVM snapshots ultimately cause fragmentation?

I'm planning on using LVM in order to be able to take atomic snapshots of large files and rsync them to a remote site. What I'd like to know is whether there is any long-term impact on the main ...
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1answer
32 views

Built new kernel, LVM won't mount from initrd

I need to upgrade my kernel on a RHEL 5 system to build with some experimental drivers. I have configured the kernel with module loading for LVM (dm_* modules). Once the initrd runs the /init ...
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Should LVM partitions be used in virtual machine images?

Should LVM be used for the partitions when creating VM images (e.g., KVM images)? It seems like it adds complexity if you want to, say, mount a qcow2 image in the host if the image has LVM partitions. ...
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1answer
54 views

Swap partition in LVM?

I was wondering if putting the swap partition into a logical volume group has any drawbacks (e.g. performance), or would it be "just the same" as having it as a separate primary/logical partition? I ...
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1answer
85 views

How do I resolve an error when booting, “Couldn't find device with UUID…”

I have a RHEL 6 system, running on a VMWare machine. The admin of the VM server added a second RAID volume to the server, which my RHEL system does not use. Now, when I boot the RHEL system, I get a ...
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How to increase an FS using a LiveCD - that has SW RAID+LVM

If we have an older OS and can only increase the FS if we umount the FS because it is the ex.: /usr - then we have to use a LiveCD. The /usr is in the rootvg (LVM) that is on a SW raid Q: What are ...
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58 views

LVM - failed to install bootloader

I have Mint 16 installed on an LVM system. I originally had 3 logical volumes: lvswap, lvrootone, and lvstorage, with Mint 16 installed on lvrootone. I was hoping to use this scheme to upgrade and try ...
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Why does hdparm see two different values for the size of a drive?

I have a 1 TB drive attached via USB. It contains an LVM physical volume filling the entire device (without any partition table). When I tried to extend a logical volume by using the entire PV, the ...
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lvm devices under /dev/mapper missing

I'm using Debian squeeze, and running LVM on top of software RAID 1. I just accidentally just discovered that most of the links under /dev/mapper are missing, though my system seems to be still ...
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1answer
371 views

Recover MDADM Raid 5 in LVM with badblocks

I'm pretty sure I'm dealing with at stuffed RAID 5 array. Two of the drives were listed as failed in /proc/mdstat and mdadmdetails: 0 0 8 33 0 active sync /dev/sdc1 ...
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181 views

What does this lvcreate call do?

Could someone explain this line: lvcreate -l 128 vg_appli -n lv_cmp I think 128 is the size, but what is it doing as a whole?
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How does grub2 load the kernel from an LVM volume?

Grub2 is able to load the kernel even if /boot is placed on an LVM volume. To use this feature one needs to add insmod lvm (the module can be on the grub bios partition that is not on an LVM volume) ...
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How to extend LVM in RHEL 5.6

I need to extend the LVM on one server. This is the output of df -h: Filesystem Size Used Avail Use% Mounted on /dev/cciss/c0d0p2 58G 26G 29G 48% / ...
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422 views

How to extend an ext3 partition over LVM inside a file (virtual machine)?

I need to extend the root partition of a virtual machine (VM) using LVM (Logical Volume Manager). I can afford a few minutes of downtime so a VM shutdown/reboot is fine. The virtual hard disk is in ...
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Converting RAID partitions to LVM

I have a 3TB HDD. of type RAID 5. I want to convert it to LVM. How can I do this without data loss and without needing for installing the OS again? $ df -h Filesystem Size Used Avail Use% ...
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112 views

How to reduce LVM size and increase one exsiting partition space

I want to increase 7 GB space in one of my existing partitions (/dev/xvde1), and reduce an LVM partition 7 GB (/dev/mapper/vg--home-lv--home). My total disk size is 40 GB. Detail of partitions is as ...
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89 views

Removal of HDD causes kernel panic

I recently added a 2nd HDD to a system and then proceeded to do a clean install on to this 2nd HDD of CentOS 6.5. The original system was CentOS 5.9. My plan was to leave the original HDD in place so ...
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1answer
153 views

How to add existing normal partition into LVM in Linux?

I'm having a partition in Linux with some data, I want to add this partition into LVM, which is already running in the same system. What will be the step to do so?
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2answers
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Very poor read performance compared to write performance on md(raid1) / crypt(luks) / lvm

I'm experiencing very poor read performance over raid1/crypt/lvm. In the same time, write speeds are about 2x+ faster on the same setup. On another raid1 setup on the same machine I get normal read ...
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Create swap partition after install

I already have parititon contain data under lvm enviroment with centos 5.8 output of fdisk -l root@server [~]# fdisk -l Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, ...
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51 views

Restored VG has shifted volumes

I'm recovering a PV on a mdadm RAID 1 with a single VG containing several LVs. The underlying devices have several bad sectors (one just a few, the other really much) and a silly typo made it ...
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Couldn't fill logical volume maps [closed]

So I have a big problem here. On our server, there is an LVM raid with one volume group called raid. It contained two volumes, secured and unsecured and some unallocated space. Today I tried to remove ...
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100 views

Is it useful to setup RAID0 on laptop? [closed]

I have a Dell laptop, which I am going to replace the CD-ROM hub with a HDD. I am thinking if I setup a RAID0 on my original HDD and the new HDD, would I have some I/O performance improvement? ...
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1answer
51 views

Can I convert an existing LVM VG to a stripe (RAID0 eq)?

I have an existing LVM volume group of 3 disks (ext4), with 4 logical volumes. Not quite ready for the leap to a nextgen FS, I would like to balance the load on the disks. I have seen you can create ...
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160 views

Multipath to a logical volume in a staging VM

How do I configure multipath in testing VM (purpose is purely academical)? I made new logical volume, modified multipath.conf to be as follows: defaults { udev_dir /dev ...