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

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Arch Linux boot failure: Fsck check on LVM /var mount fails

I recently installed Arch Linux on an older laptop that I am using as a personal workstation and machine to better learn how to administer Linux. I have a persistent boot failure that has started ...
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38 views

Duplicate UUID's for Physical Volumes But PV's aren't in a Volume Group

I have some dead/stale/non existent logical volumes without group pvs said File descriptor 3 (pipe:[306492]) leaked on pvs invocation. Parent PID 30844: -su Found duplicate PV ...
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38 views

How can I recreate removed LVM Logical Volumes?

I accidentally removed all my Logical Volumes with lvremove. After reboot the lvm backups were lost (live CD) so I can’t use vgcfgrestore. testdisk can find the partitions by analysis so they are ...
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47 views

Dual Boot Debian on Raid 0 in UEFI mode

My new notebook came from the factory with Windows 8 on two 128GB SSDs in RAID 0 mode. I wanted to dual boot it with a Linux distro, I settled on Debian, so I resized my C: drive as one normally would ...
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14 views

How to stop caching a LVM partition?

I currently have LVM-cache set up on my Ubuntu install as described in https://rwmj.wordpress.com/2014/05/22/using-lvms-new-cache-feature/. (I did have to install some of the vivid/proposed packages ...
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20 views

Experimenting with Xen on already running Debian without LVM

A co-worker of mine was telling me about using Xen for virtualizing systems on Debian, and it peaked my interest. I looked up the instructions on Debian's Wiki regarding installation. I already have ...
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22 views

/sbin/cryptsetup not found on boot

I've created an encrypted root partition using LUKS which contains a few LVM partitions. I can't boot and get the following output on startup: Begin mounting root file system ... Begin: Running ...
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84 views

LVM Encrypted Partition without Partition Table

I have the following Problem. My Laptop is fully encrypted with LVM I know the Passphrase, but the partition table is broken. I booted from an USB Stick in this Case sdb1. Is there any hope to get ...
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83 views

stdout redirect. sh: resource temporarily unavailable

I have large batches of bash processes. Each bash script invokes executeables which have their stdout redirected to distinct log files. About 5% of the runs end up with: sh: [name of log]: Resource ...
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2answers
161 views

Slow access to btrfs on LVM/

We have this setup on our server: Ubuntu 14.04 (used to be 12.04) 10TB RAID-6 system LVM (one VG, two LV) ext4 partition ( ~2TB) Btrfs partition ( ~8TB) After a reboot last month the system was ...
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1answer
25 views

Panic fault when mounting LVM2 volume

I have a CentOS 7 system that I can boot using a live cd. The system HDD's have an lvm2 partition with 2 volumes /root and /home. I can mount /root volume without any problems in the live ...
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76 views

Resize a btrfs partition inside a logical LVM volume

Following derobert's trick to resize the underlying filesystem when resizing a LVM volume: lvm> lvextend -r -l +100%FREE /dev/VolGroup00/lvolhome fsck from util-linux 2.25.2 /sbin/fsck.btrfs: ...
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271 views

mount: warning: /etc/mtab is not writable (e.g. read-only filesystem)

Working on my system I noted that the root filesystem is mounted read-only. My system worked for months, today I get this error: mount: warning: /etc/mtab is not writable (e.g. read-only filesystem). ...
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1answer
23 views

Install Lubuntu as 2nd OS on encrypted computer?

I have debian installed on my computer which is installed in a full encrypted disk. Having tried lubuntu in virtual box form and liking it, I want to try lubuntu out on the actual computer instead of ...
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61 views

Parititioning for a UEFI boot loader, can LVM be used?

I just bought a gently used laptop and I am trying to figure out why this is. It has a single SSD that when running fdisk -l shows as Disk: /dev/sda. Under it though are 5 "devices" under that disk, ...
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32 views

What is the UUID format used by LVM?

Linux LVM assigns UUID values to physical and logical volumes but they aren't valid RFC4122 UUID strings. Here is an example: 2185fe86-41d4-4311-9a47-8f0ebc7ecc5a RFC4122 ...
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39 views

Booting from an lvm-cached volume

I created a cache pool following this article. The process seems to be successful. After doing an upgrade-grub and rebooting, Grub complains that it can not find the root volume (showing a UUID). - ...
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28 views

Lvm showing in suspended mode

LVM is in a suspended mode, how can I activate it? I tried: $ sudo vgchange -ay vgname $ sudo Vgexport $ sudo Vgimport But it isn't working.
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97 views

Shrinking LVM physical volume on top of mdadm degraded RAID array, adding a spare and rebuilding it

I have a Debian Wheezy system with a couple of 500 GB HDDs in RAID-1 (mdadm mirror), on top of which sits LVM logical volumes with 5 partitions (boot, root, usr, var and tmp), total size of 47.15 GiB. ...
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56 views

Mounting synology disks in ubuntu

I have some files on synology disk that I would like to recover with extundelete. I have mounted the raid1 setup. So on the disk is two raid storages (md2 and md3) and they are connected to one with ...
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1answer
97 views

Physical volumes, logical volumes, superblocks gone… how to boot?

A story fairly similar to this one happened to me yesterday. Update: My only hard drive /dev/sda was originally partitioned this way: Device Boot Start End Blocks Id System ...
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90 views

External drive EFI bootloader with Debian 7.7 Wheezy

I'm currently trying to install Debian 7.7 on a removable drive with an encrypted LVM from DVD-1 with a self contained EFI bootloader like the one the DVD uses - that is, the computer's HDD should be ...
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9 views

system-config-lvm - Move/Migration Status

Using the tool system-config-lvm, is it possible to see the status of the migration of data? Currently, when moving data, the gui stops responding and turns grey. I am only notified of completion ...
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115 views

Unable to boot with dracut and luks: '/dev/resume' : file exists

I am installing gentoo and have performed my first reboot after configuration and installation within my chroot environment. I am using LUKS and LVM to manage encryption of my drives. I am encrypting ...
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122 views

LVM volume corrupted, can't be mounted after reboot

I created a LVM volume using this guide I have 2x2TB HDDs for a total of 4TB (or 3.64TB usable). I created the volume and rebooted. Everything was working fine. Then I copied 1.6TB of data on the ...
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29 views

Grub and Logical Volume Management

I've not been able to find any relevant information in the Arch Wiki about using LVM with Grub as the bootloader (BIOS). Let's say I've created the volume group 'volgroup00' using partitions spanning ...
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54 views

broken fs after removing disk from LVM group

I messed up a bit and I am trying to find the best way to recover. A few days ago, 1 of the physical disk of my lvm setup started to show sign of failure (I/O errors) so I decided to move it to ...
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1answer
239 views

What is lvmetad and why would I want or need to use it?

I have a Gentoo server with LVM running on top of a RAID array that I have been using for a number of years. Recently I upgraded LVM to 2.02.109 (don't recall what version it was before) and received ...
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26 views

Can LVM split files between volumes?

Let's say I have 2 volumes 2 GB each (kept as single group). And I would copy there 3GB file. Will it be split? I just hope the answer is "no", and the files are atomic. The reason is -- with ...
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226 views

How to make grub mount encrypted LVM partition

I have such boot sequence: system boots from external disk, right after start it asks about password for LVM encrypted partition (which holds /root and /home), I enter it, the partitions are mounted, ...
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23 views

Where is the LVM area which is not usable by LVM?

pvdisplay reports some portion of the LVM physical volume as not usable. And I need to know where this is located. To my knowledge there are ... a) space which could not be filled with an ...
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41 views

LVM Snapshot mount read-only or not?

In this page of Linux LVM Howto it's said that "LVM2 creates read/write snapshots by default". In this other page of Red Hat docs it's said that "Because the snapshot is read/write, you can test ...
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99 views

USB ethernet device not working in VM

I'm having trouble getting a USB ethernet device working in a qemu-kvm/libvirt VM. The problem is that even though the guest OS sees the USB device just fine it can't mount it. lsusb on the guest ...
4
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1answer
56 views

Cannot mount LVMm: resume ioctl on failed

I wanted to resize my LVM, followed some tutorial on the net and the system totally crashed (I got some boot error with UUID not found). I ran a LiveCD and tried to at least recover some files but I ...
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38 views

LVM move logical volumes across physical volumes without data loss

I wonder how can I move my logical volumes from current physical volume to another without data loss. I have read mans but I haven't found this information there. I would be grateful for any help. ...
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201 views

Resize root LVM and FS in Debian 7

I have a Debian server and I would like to increase the "root" partition from 5GB to 17GB and to diminish the "home" partition from 14GB to 2GB. I am a newbie in linux sysadmin, so a really need your ...
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34 views

RHEL 6.5 erroneously marking Fusion-io RAID1 card as failed

I am getting the following error every hour for a Fusion-io ioscale2 RAID1 (mirror) configuration. However, the logical volume is mounted and accessible. I do not see similar error in the ...
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56 views

Does the debian setup with lvm also encrypt the swap partition?

I'm planning a fresh debian install on my notebook and want to have full disk encryption. But I mainly hibernate, which is why I want my swap to be encrypted as well. During the graphical expert ...
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1answer
93 views

boot fails with “cryptsetup: lvm fs found but no lvm configured” [dual boot(2xlinux LVM, dm-crypt+luks)]

I have a dual-boot(xubuntu/#!) setup LVM with dm-crypt+luks as follows /dev/sda1 = /boot (xubuntu) /dev/sda2 = /boot (#!) /dev/sda3 = encrypted LVM /dev/mapper/volgroup-xroot = / (xubuntu) ...
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78 views

Replicate a complex partition structure with LUKS and LVM volumes

I have two external hard discs on an OpenSUSE 13.1 system. On one I have created a partition structure: An encrypted LVM partition (LUKS) Several volumes (10) on this LVM partition, some formatted ...
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35 views

Creating a specific sized LVM logical volume at the end of a physical volume

I have a physical volume that is 49.8GB and I want to have a 2GB logical volume which is at the end of the physical volume and the rest of the physical volume being another logical volume. I read ...
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25 views

Whose responsibility is to divide data into PEs or chunks?

When we create LVMs or the RAID partitions, the data we save in the parition is divided into PEs or the chunks respectively instead of the conventional blocks of ext3 or ext4. My doubt is whose ...
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497 views

How to identify LVM-over-LUKS or LUKS-over-LVM

I recently installed Fedora 20. I don't recall what exact options I chose for encrypting the disk/LVM during installation. It installed fine and I can log in etc. Here is the situation I have: I ...
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2answers
401 views

vgdisplay shows 0 free PE/size

I'm trying to configure a CentOS HA system with 2 nodes, with DRBD for replicated storage. I'm following the "Clusters from Scratch" guide, and at the DRBD portion, I need to create a partition for ...
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3answers
230 views

How to combine multiple HDDs into one big HDD in Linux?

I'm very new to Linux, being mainly a Windows 7 user, so I may not understand Linux-specific commands without explanation. I've decided to build a NAS running some form of Linux (probably FreeBSD or ...
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1answer
353 views

resize root volume with lvextend insufficent space error

My root partition is running out of space, so I'm trying to extend/resize it. Filesystem Size Used Avail Use% Mounted on /dev/mapper/u64-root 19G 18G 823M 96% / none ...
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53 views

Empty VG, but full?

I'm trying to use KVM with my dedicated server hosted on OVH, but that would require me to have a LVG (logical volume group). I have created the LVG named vg through OVH's control panel and loaded the ...
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3answers
411 views

Difference between fsfreeze and lvm snapshot

I heard recently about fsfreeze and I'm very interested in making snapshots of my VM with VMware and get a consistent state of disk using quiescence. All my file-systems are LVM volumes, and man ...
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0answers
25 views

lvm not coming up after multiple reboots, couldn't find a device with UUID

I am really confused. I have rebooted my RHEL system after more than 6 months uptime only to find it is giving me this error: Couldn't find device with uuid WetODA-57Jc-c4XM-WRwS-I2Db-4AYV-uDRfA0 ...
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0answers
98 views

How to recover a physical volume in LVM that shows as an unknown device?

I've been wanting to learn more about LVM, so I finally have taken the time to dive into it. Being the very smart computer guy that I am, I had the great wisdom to experiment with LVM on one of my ...