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

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2
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1answer
30 views

Debian error message: “Unable to find LVM volume”, but then boots successfully

I was trying to encrypt all the HDD during the installation process of Debian 8 Jessie using full disk encryption + LVM, and I did it, but, there are a little "problem". Before the system asks me the ...
2
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0answers
19 views

recover lvm formatted partition

I had 2 old drives having LVM installed showing as 1 drive. They were attached by the datacenter to the new server to migrate data but they weren't able to be mounted I tried everything possible until ...
2
votes
2answers
91 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 ...
3
votes
2answers
694 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 ...
2
votes
1answer
16 views

/dev/mapper in fdisk

After installing CentOS, I see several lines like /dev/mapper/centos_jackpc--11-swap and /dev/mapper/centos_jackpc--11-root when I issue fdisk -l. What is the purpose of these? And why do they not ...
3
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2answers
47 views

Command 'pvs' says PV device not found, but LVs are mapped and mounted

I had problem with my system (faulty internal power cable). When I got the system back up and running, arrays rebuilding, etc, I seem to have a situation where the pvs command (and vgs and lvs) ...
2
votes
0answers
14 views

Mount LVM volume as external usb drive? CentOS 6

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 ...
2
votes
1answer
13 views

How to reduce ext4 rootlv on centos 6

Is there a way to perform a safe reduce in rootlv at rescue mode? Most of the internet's explanations tells, basically, that it can be done using the following steps sequence: vgchange; fsck; ...
5
votes
0answers
19 views

How to restore an LVM container to a bigger physical partition?

The setup is an encrypted LVM container/PV that holds a few ext4 partitions. I am moving these to a new machine, but there is more room on the disk. So, I have created a bigger encrypted LVM ...
3
votes
1answer
703 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 ...
-1
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1answer
30 views

VM ware copy paste from windows [closed]

I what to copy paste commands from windows to terminal in VmWare Anyone know how to do it ?
0
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1answer
27 views

How do backups that use LVM work?

Some LVM tutorials seem to claim that one take a snapshot of a logical volume (LV), then backup the snapshot using another tool, then remove the snapshot. When the unspeakable happens, the user can ...
0
votes
2answers
828 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 ...
0
votes
0answers
16 views

one nautilus device went missing, why? and how to fix?

nautilus devices are provided by /usr/lib/gvfs/gvfs-udisks2-volume-monitor, I've already restarted it but one device is still missing. I also tried strace on it, but it only outputs info about mounted ...
2
votes
2answers
526 views

Extending/resizing Fedora Guest-OS root-drive in VirtualBox

I hope you can help me with that: My VirtualBox Guest-OS (Fedora 19) told me, that there is not enough free disk-space availabe, so I first increased the .vdi-file by using the Windows-Commandline: ...
2
votes
2answers
509 views

KVM linux guest, 2nd HDD, LVM partition or whole disk

I've got a RAID 10 arrays on a couple of KVM host machines. The RAID 10 array is one big VG. I usually create a small LV for guest disk image storage then the rest of the VG I carve out as LVs to add ...
10
votes
5answers
33k views

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 ...
0
votes
1answer
25 views

Lvreduce online on RHEL 6 or centos 6 with ext4 file systems

Is it possible to reduce a mounting lv safely at RHEL6/CentOS6 with ext4 file system? If it is, how can I do that?
0
votes
1answer
1k 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 ...
2
votes
0answers
24 views

Recoving LVM logical volumes after having to recreate the physical volumes

After reinstalling my system to a new SSD, my existing LVM was toast, it couldn’t find any physical volumes or volume groups. I also don’t have backups of my LVM configuration. Also to further ...
1
vote
2answers
38 views

Why it is not recommended to put boot partition on lvm?

I read somewhere that it is not recommended to put boot partition on lvm based partition. But, I'm doing it anyway. Then the only problem I've faced on this is sometimes when I install a new Linux ...
2
votes
2answers
272 views

after adding one more physical volume and enlarging logical volume, grub fails

Several years ago I installed Debian on my 500 GiB hard disk. During installation I chose to have encrypted filesystem. So installer created one small unencrypted boot partition (I guess that grub ...
2
votes
1answer
184 views

Error “/run/lvm/lvmetad.socket: connect failed: No such file or directory” - but not Grub related

All LVM commands give me the error /run/lvm/lvmetad.socket: connect failed: No such file or directory. I Googled this error and found only postings related to Grub and Grub-install. wish to get rid ...
2
votes
1answer
35 views

Thin LVM pool frozen due to lack of free space, what to do?

My thin LVM pool got full and some programs hung: device-mapper: thin: 253:4: reached low water mark, sending event. device-mapper: thin: 253:4: no free space available. INFO: task jbd2/dm-6-8:742 ...
5
votes
2answers
42 views

Define physical volume inside non-partitioned disk

I've been able to define a physical volume (LVM) in two ways: Creating a 8e (Linux LVM type) partition and then # pvcreate /dev/sdb1 Usign pvcreate directly using a non-partitioned disk and then # ...
0
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0answers
62 views

Logical Volumes fails to mount with dmsetup and no table present

I am stuck with all the volumes on a volume group unable to mount, after a yum update on a CentOS 5.11. device-mapper upgraded from 1.02.24-1 to 1.02.67-2 The machine boots correctly from ...
3
votes
0answers
29 views

LVM - Recovering from partition table corruption

I accidentally deleted a partition on a physical disk that was involved in an LVM system. I tried using testdisk's analyse feature to find the LVM partition, but it couldn't locate it. Should I invest ...
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2answers
35 views

VGEXTEND: How to avoid wiping a swap signature in /dev/sda3?

The problem: [root@195623 ~]# vgs VG #PV #LV #SN Attr VSize VFree fedora_195623 1 3 0 wz--n- 9,50g 0 [root@195623 ~]# vgextend fedora_195623 /dev/sda3 WARNING: swap ...
1
vote
1answer
28 views

Fault-tolerant iSCSI root fs for Linux

I am in the process of moving some Linux servers onto a virtualized environment with their filesystems mounted from LVM volumes, which are in turn hosted on a remote NAS via iSCSI. I am able to start ...
0
votes
1answer
28 views

Centos missing ext3.ko

Earlier I encountered this error. lv_root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY Which may be caused by the constant power failure here in our office. I fixed it by inserting a centos 6.4 disc ...
0
votes
1answer
550 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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0answers
74 views

LVM unknown device: how to recover?

I have a server with two hard drives that I thought I had correctly installed with LVM, until I discovered that the second hard-drive did not actually seem to be used. I investigated the problem and ...
6
votes
4answers
8k views

How do I combine two logical volumes that reside on a single physical volume in LVM?

I have two logical volumes, one is mounted as /, the other is mounted as /home. I want to combine them, because the / volume is constantly running out of space. (Yes, I know what's using all that ...
2
votes
1answer
90 views

Can BTRFS stripe RAID arrays?

I've been using an Ext3/4+lvm2+mdadm file system setup for about 5 years on a file server. This has grown (and moved processors a couple of times) and I've moved disks between systems ...
2
votes
1answer
4k 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 ...
1
vote
1answer
105 views

Is fdisk needed with lvm?

Most documentations about LVM have roughly these steps: fdisk /dev/sdb pvcreate /dev/sdb1 vgcreate fileserver /dev/sdb1 lvcreate --name share --size 40G fileserver mkfs.ext4 /dev/fileserver/share ...
2
votes
5answers
56 views

space-efficient disk snapshots on Linux

I like the ability of VirtualBox to instantly create and restore snapshots and I was wondering, if it's possible to do similar things on the host machine. First I looked at lvm snapshots, but some ...
2
votes
1answer
19 views

Can one physical disk provide space for several volume groups?

Can one physical disk provide space for several volume groups? Or one disk can have only one volume group in the Linux LVM? Can we use one disk in several VG's?
4
votes
2answers
3k views

Must the filesystem be unmounted while extending an LVM logical volume?

I have seen some tutorials on extending an LVM2 logical volume. None of them instruct you to unmount the filesystem. They claim that you can extend an LVM volume while it is in use. Is this right?
2
votes
2answers
161 views

How to add a dm-cache to an already existing luks setup?

I've got two physical devices, a fast SSD and a large HDD. The SSD is in VG ssd and ends up serving as mountpoint /, the HDD is in VG dump and serves as mountpoint /home. Both go through LUKS for ...
1
vote
1answer
35 views

What is the proper way to activate VGs/LVs automatically on boot?

I have used Buildroot to create a system that runs in RAM on my ARMv5 Kirkwood SoC -based NAS-box. I use BusyBox as my init system, and /dev management is done using devtmpfs only. I've selected LVM2 ...
0
votes
0answers
32 views

Cannot mount LVM partition after restoring LVM metadata

I have resized two LVM partition (/var and /home) and somehow resize process went wrong. After reboot system wasn't able to mount /var and /home. I have used RIPLinux to check if I can mount those ...
29
votes
7answers
18k views

SSH to decrypt encrypted LVM during headless server boot?

When I installed Ubuntu 10.04 and, now, 10.10, I was offered the option of enabling "encrypted LVM" for my hard drive. After choosing that option, I am prompted for my password during boot to decrypt ...
2
votes
0answers
1k views

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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0answers
57 views

clvm (cman) has problems with dlm

I am trying to create a volume group which is accessible on two servers with clvm. I read about it and it looks like it is most easily to do this with cman. But after hours of testing I cannot achieve ...
13
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3answers
19k views

How to reduce Volume Group size in LVM?

[root@localhost ~] vgdisplay --- Volume group --- VG Name vg_root System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 7 VG ...
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0answers
309 views

Jessie: can't boot the kernel 3.16.0-4-amd64

I have been using Jessie for a few months now, and I had a problem booting my computer a few weeks ago. I had this error on boot: early console in decompress_kernel Decompressing Linux... Parsing ...
0
votes
2answers
144 views

“No volume groups found” after running vgdisplay

I am trying to expand my primary partition to use the extra disk space I have added in my VMWare virtual machine. I have been able to add the disk space, partition the extra space into an LVM ...
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0answers
60 views

fsck single disk from Raid 0 lvm

My NAS (Seagate Blackarmor) is refusing to connect to the network after a fsck. I assume the root filesystem (stored on flash) might have been corrupted somehow after running fsck. The setup was a ...
1
vote
1answer
60 views

How to create an /opt partition on an existing installation without loosing data?

I've shrinked my /home from 2.7TB to 100G, I've extended /root, /usr, /tmp and /var but I have been looking for a way to create an /opt partition for 3 hours now, and can't find it. The setup is 3TB ...