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

learn more… | top users | synonyms

2
votes
1answer
328 views

LVM keeping harddisk awake?

I have a Lenovo W530 running Arch with kernel 3.79 (for bumblebee) and laptop-mode is configured properly and running. It has one SSD (sdb) and one harddisk (sdb). The sdb disk has two lvm-volumes: ...
2
votes
1answer
691 views

Problem with permissions when sharing a mounted filesystem

I am setting up a linux to act as a fileserver, using CentOS 6.3. Since I want to have disk quotas and can't install LVM (it is a 32 bit machine), I am using an LVM volume with ext4 mounted as ...
1
vote
1answer
3k views

Install Backtrack 5 r2 into running LUKS setup installed with ubuntu

One Harddisk (sda) Two Partions. With a working ubuntu running. 1) /boot 2) LVM with this virtual volumes/partions/ or whatever they are called inside: Swap Ubuntu Home Prepared for Backtrack Of ...
1
vote
2answers
566 views

Migrate an entire volume group LVM2 to RAID5

I have a Virtual Host server build with Ubuntu and Xen SO Ubuntu 12.04.1 LTS 64Bits xen-hypervisor-4.1 Disk Hitachi SAS 15K 147GB (x2) in a Volume group sda1 1GB /boot sda2 146GB lvm sdb1 ...
1
vote
2answers
109 views

How to find the underlying disks of a mirrored volume in LVM (linux)?

When I run command lvs -a the output shows the logical volumes from which the mirrored-volume has been made but how to find the actual disks from which the sub-logical volume were allocated. Any ...
1
vote
2answers
5k views

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% / ...
1
vote
2answers
2k views

How to resize logical volume to fit filesystem

How can I resize logical volume to fit filesystem automagically?
1
vote
2answers
42 views

What's the difference between a partition and physical volume?

Why can't we directly create a volume group over a disk without creating a physical volume from it? What is a physical extent? Do we even have physical extents in a partition?
1
vote
1answer
151 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 ...
1
vote
2answers
2k views

What does a mirrorlog do in LVM mirroring?

http://www.tcpdump.com/kb/os/linux/lvm-mirroring/intro.html states that when mirroring a Logical Volume in LVM we need a "A volume for the log "... ehh, what exactly is a mirror log? Is it always ...
1
vote
2answers
41 views

Increase root partition by reducing /home

Hi I need to increase root partition space by reducing /home, in a Centos 6.6,my situation is this: /dev/mapper/VolGroup-lv_root 50G 46G 1,6G 97% / tmpfs 1,9G ...
1
vote
1answer
50 views

Creating separate volume for /var/log/ and /var/log/audit/

I need to migrate /var/log/ and /var/log/audit to separate volumes. Currently the entire /var/ directory is on a logical volume with ample space (45G). I understand how to shrink and create new ...
1
vote
2answers
118 views

How to obtain info about physical volume as non root user

Hello the pvs command gives me the following output: PV VG Fmt Attr PSize PFree /dev/sd** ***** lvm2 a- 59.49g 47.49g /dev/sd** ***** lvm2 a- 25.00g 8.00m This only works if ...
1
vote
1answer
3k views

Is there any way to do a CentOS minimal install without LVM / ext4?

I'm trying to benchmark the disk throughput of a base CentOS install on my lab XenServer setup, and am installing from the CentOS 6.4 minimal CD. However, the install ISO boots into a text-mode ...
1
vote
1answer
463 views

Cannot mount filesystem under luks. Device does not exist

I made one big luks device and re-used it on my debian install, then i ran into some boot problems and i need to acess the filesystem. The problem is, i decrypt the luks device and when i try to ...
1
vote
1answer
371 views

Turn on Swap after resize /

I resized with lvresize the swap from 4 to 2G and can't turn it on. swapon /dev/VolGroup/lv_swap swapon: /dev/VolGroup/lv_swap: swapon failed: Invalid argument lvdisplay /dev/VolGroup/lv_swap ...
1
vote
2answers
76 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 ...
1
vote
2answers
63 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
174 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 ...
1
vote
1answer
98 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 ...
1
vote
1answer
498 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, ...
1
vote
1answer
91 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 ...
1
vote
2answers
106 views

How to reduce and remove Physical Volume from active Logical Volume?

For testing purposes I've tried to extend my logical volume by attaching one more Physical Volume (USB drive). Making the USB drive part from the logical volume with the following steps: Created ...
1
vote
1answer
51 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 ...
1
vote
2answers
547 views

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 ...
1
vote
1answer
224 views

How can we resize the LVM in Fedora 17?

I was trying to install Backtrack along with Fedora 17. While installing the BT I found there was no free space in my system. When I checked the FS in Fedora, all my space in HDD is used as LVM.
1
vote
1answer
776 views

LVM hangs while trying to create my root device node

Followup to How can I check for bad blocks on an LVM physical volume? The title mostly sums it up. Basically, I have a box partitioned with a regular /boot partition and then an LVM physical volume ...
1
vote
1answer
96 views

Is it safe to reformat an lvm root partition?

My system currently has a volume group containing root, swap, and home logical volumes. I would like to reinstall the operating system in the root volume and format the partition in the process. I ...
1
vote
1answer
120 views

How can I use two HDD as one on Debian?

I have installed Debian on my server with a 250GB HDD. Now I have bought another HDD that is 2TB large, but I don't know how I could use that 2TB with my webhosting solution. I heard about LVM, but ...
1
vote
2answers
736 views

Transfer a Fedora system to another computer

I'd like to transfer my Fedora to a remote machine. Fedora is under Grub 2.0 and on the remote machine there is a Centos system and Grub 0.97. In fact, I have two questions. First is how to properly ...
1
vote
1answer
197 views

Reading encrypted partition with broken LVM2 inside?

I overwrote some LVM2 metadata in much the same way as Recovering overwritten LVM metadata . That is, I attempted to install Debian 6.0.7 on a system with existing encrypted volumes and LVM2 volumes. ...
1
vote
2answers
612 views

Should I be worried? Segfaults reported in syslog when merging LVM snapshot (reverting the original back to the snapshot)

I was just experimenting with snapshots in LVM on Ubuntu 12.10. I created a snapshot logical volume of 6.5 GiB, and after making some changes to the origin decided to merge the snapshot back in to ...
1
vote
1answer
1k views

Need to change the mount Point of LVM /u001/app/oracle to /u001/

This is the situation.I installed the RHEL 5.5 on client's system and created LVM mount point at /u001/app/oracle and now he has installed DB on /u001/app/oracle. He is asked me to change the mount ...
1
vote
1answer
664 views

Complete install on RAID1 + LVM

When doing a complete install of Linux is it possible to install everything including /boot on 2 software RAID 1s (4 hdds) + LVM? I haven't been able to figure out whether this is definitely ...
1
vote
1answer
833 views

Partitioning scheme for a virtual machine host

I am planning to use an Ubuntu Server 12.04 with KVM to create 2 virtual machines. Reading some docs on the net, I have found that a good approach is to use LVM based VM, so my idea is to have: 1 ...
1
vote
3answers
875 views

How to find all disks & their size before using them?

I need to know the following information, before using the harddisk to create logical volumes or database.. Any perl modules or snippet would be of great help. how many hard disks are presented to ...
1
vote
1answer
146 views

# of reads/writes for LVM vs. “regular” partitioning?

I am going to be installing linux to a USB flash drive (an actual install, not a "live usb"). I need it to be completely portable, so I can't realistically have the high-access partitions (swap, var, ...
1
vote
1answer
661 views

Resize a Physical Volume, resize2fs won't work with it

I need to resize my PV so that I could make room for a new partition, /dev/sda7 --> belongs to Volume Group: vg0 vg0 has 23g free space not allocated, so I tried pvresize ...
1
vote
1answer
6k views

How to decrease the size of a logical volume/fs aix?

oslevel -s 6100-03-03-0943 IF I have a Logical Volume that I need to shrink, then how can I do it? [there could be several FileSystems on it...]. What is the process?
1
vote
1answer
2k views

How to Mirror one more disk on existing filesystem

In my test machine I can see the filesystem list using bdf commands. $bdf Filesystem kbytes used avail %used Mounted on /dev/vg00/lvol3 58916864 6242747 49386840 11% / ...
1
vote
1answer
1k views

Device names for logical volumes

Consider this: # fdisk -l /dev/sda Disk /dev/sda: 298.9 GB, 298999349248 bytes 255 heads, 63 sectors/track, 36351 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot ...
1
vote
2answers
201 views

Resizing a Logical Volume holding a live virt guest

I've got a Red Hat Enterprise Linux Server release 5.5 (Tikanga). That I'm running four virtual guests on. In /dev/VolGroup01 I have the following partitions xenvm01 xenvm02 xenvm03 Then I have ...
1
vote
1answer
19 views

Move data from regular partition to lvm

I've read a bit about lvm and decided that I want to switch to using it. It seems like actually setting up lvm can be done from the debian installer, so I suppose that'll be easiest. What I'm not sure ...
1
vote
2answers
24 views

need to repartition logical volumes

I have bad balance between my root/home LVs. Please note that I'm extremely new to understanding disk management and Linux in general, so I'm probably going to say a few things incorrectly. My goal ...
1
vote
1answer
61 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 ...
1
vote
1answer
97 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 ...
1
vote
2answers
123 views

How can I remove a disk from a group with striped volumes?

I have an HP-UX B.11.11 system with two disks. I would like to remove one, but as far as I can divine, it seems that the volumes are striped across the pair and I can't figure out how to ...
1
vote
1answer
208 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 ...
1
vote
1answer
263 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 ...
1
vote
1answer
1k 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 ...