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

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Setup Cloudmin on Centos installed in LVM

I installed CentOS 6 with default LVM partition pattern. according to this pattern Can I use Cloudmin and store KVM Disks in LVM as Logical Volume? I think Cloudmin requires creating new logical ...
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1answer
270 views

Create Logical Volume Snapshot at boot and before mount

I'm using Kubuntu 11.10 and before I upgrade to 12.04, I want to make snapshots of my filesystems. Coming to think of that, I realized that it can be very useful to create snapshots of logical volumes ...
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6k views

LVM2 can not wake up suspended logical volume

Read my story below. I'm using LVM2 with following information: Scan for VG: # vgs VG #PV #LV #SN Attr VSize VFree unix 1 1 0 wz--n- 115.00g 45.00g Scan for LV # lvs LV ...
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2answers
246 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 ...
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1answer
523 views

Why are there symlinks in /dev? (LVM)

[root@SERVER ~] ls -la /dev/vg/root lrwxrwxrwx 1 root root 17 2012-10-28 10:29 /dev/vg/root -> ../mapper/vg-root [root@SERVER ~] QUESTION: Why are there symlinks? Why there couldn't be only 1 ...
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2answers
374 views

How come lvextend allocates less than the specified amount of space?

I am trying to extend a volume, let's call it /dev/vol1. I see the initial volume size is 500MB when I call: df --block-size=M /dev/vol1 then to extend it 100MB more I call: lvextend -L+100M ...
2
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1answer
438 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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1answer
748 views

Software RAID 10 + LVM on mixed drives, sector alignment?

I have 4 2.5" 7.2k drives lying about and I'd like to build some RAID arrays for a bit of VM storage on my KVM lab box. There are 2x 320GB drives and 2x 500GB drives. I'm looking to create a RAID 10 ...
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2answers
277 views

Resizing LVM within a in KVM-based VPS

I have a VPS (based on KVM, not sure which storage technology) for about two years now. It's mainly a learning machine, a utility proxy, or a seldom-used VPN gate, or whatever--no real work, no ...
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2answers
73 views

How to configure hard drive

I have a hard drive that is not configured, it shows this in fdisk -l: Disk /dev/dm-2: 107.4 GB, 107369988096 bytes 255 heads, 63 sectors/track, 13053 cylinders Units = cylinders of 16065 * 512 = ...
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2k views

Moving /usr to its own filesystem/logical volume

My Fedora 17 (x64 - running on VMware Workstation 8) root filesystem is running out of space (this was an install using the default layout as suggested by the Fedora installer): # df -h Filesystem ...
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1answer
949 views

mdadm raid0 with disks of different size?

Currently I'm using LVM just to merge a few disks of different size. I want to know if it is possible to use mdadm with stripes instead of LVM? Will it give me additional performance? Will it use ...
2
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1answer
214 views

Device node LVM

There is mention of a device node, when I was reading about LVM. I can't find anything useful as to what it is or functions as. Any help or suggestion of where to look would be appreciated.
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2answers
3k views

How to check LVM mirroring under Linux?

How can I check the LVM mirroring under Linux? E.g.: are there any mirrors on a given machine & some details about them, etc.
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2answers
2k views

How to change dm_crypt aes/256 LVM password after install?

I installed Fedora 14 & Ubuntu 10.04 LTS on my PC. I used dm_crypt/LVM with aes256 in both installs (2 VolumeGroups, each encrypted, so there is 2 separated & encrypted linux distro on this ...
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1answer
304 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
241 views

lvm: what's the purpose of a Volume Group?

Each Volume Group can have many resizeable Logical Volumes. each of Logical Volume can have different filesystem, encryption options etc. that means having a single Volume Groups is enough. so why LVM ...
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1answer
393 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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1answer
497 views

Decrypt second encrypted LVM during headless server boot?

I've followed this question https://unix.stackexchange.com/questions/5017/ssh-to-decrypt-encrypted-lvm-during-headless-server-boot and successfully remotely decrypted my root drive. However, I have a ...
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1answer
4k views

fdisk isn't showing my hard drive as properly formatted (but it is)

I've got 3 1TB drives which I've set up to use LVM. Here's the output of pvdisplay: --- Physical volume --- PV Name /dev/sda1 VG Name vgpool PV Size ...
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1answer
583 views

Equivalent to “copies=2” feature of ZFS in Linux with LVM

I have a laptop with only one HDD and is impossible add other HDD. The feature "copies=2" of ZFS is the perfect solution for to add redundancy to my /home in the laptop. I would like emulate the ...
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1answer
7k views

How do I determine LVM mapping on a physical device?

I have a server (SUSE 11.5) that has two disks. There is only one volume group (vg01). How do I determine the physical device on which that vg exists?
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1answer
556 views

Can I alter my Fedora LVM LV to install a new distro as a dual-boot?

My question is almost a duplicate of this question, but not quite because that one is about ext3 and I am already using LVM. I have an older HP Pavilion laptop running Fedora 11. I chose Fedora ...
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3answers
237 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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2answers
2k views

device mapper on RHEL6 unable to create devs for LVM logical volume

I have XEN guest running RHEL6, and it has a LUN presented from the Dom0. This contains an LVM volume groups called vg_ALHINT (INT for Integration and ALH is an abbreviation of its Oracle database ...
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1answer
106 views

Why is df -h size, util and dispo not corresponding to each other

When I'm using the command "df -h" I'm having the following output : Filesystem Size Used Avail Use% Mounted on /dev/mapper/fedora-root 20G 9,4G 8,8G 52% / devtmpfs ...
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2answers
133 views

Why is LVM metadata backed up to /etc/lvm and not /boot?

Recent question I saw got me thinking on this particular point: If bootloader restrictions usually cause /boot to be outside LVM, why isn't this the target of LVM metadata backups? Putting it ...
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2answers
326 views

Transfering whole linux system to a new disk

Few weeks back I installed linux as a virtual machine on my windows 7 system but I didn't gave much thought to(or miscalculated) the size of various partitions and even worse I'm not using 'lvm'. ...
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2answers
2k 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?
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2k views

Reduce LVM /tmp size to 10G and add everything to / root dir

I want to reduce the partition mounted at /tmp to 10GB and add all unused space to the / partition. If I umount -l /tmp and run fsck.ext3 -f /dev/privg/lv_tmp, I get this: fsck.ext3: Device or ...
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1answer
3k views

Devices get renamed when SATA disk attached

I have an HP xw8200 workstation running linux with two small, fast SCSI drives hooked up to the onboard LSI SCSI controller. The drives get labeled /dev/sda & /dev/sdb in /dev, respectively. I ...
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2answers
263 views

Recreated VG. Is it possible to add existing LVs to it?

I had a CentOS 5.5 server with two drives in it (sda, sdb) using LVM. sda had a combination of physical partitions and LVs. sdb had one volume group named data with multiple logical volumes. There ...
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1answer
66 views

Would this LUKS LVM rsync restore method work?

I have an Ubuntu installation using LVM and LUKS encryption. LVM and encryption were chosen during the install process). While logged into it, I backup the full live system using rsync to another ...
2
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1answer
499 views

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 ...
2
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1answer
113 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 ...
2
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1answer
55 views

How do I see what logical volumes are on a physical volume?

I have a volume group composed of dissimilar drives - an HDD and an SSD. I'd like certain LVs to live on the SSD. I can suggest this to lvcreate when creating new LVs, and I can move things around ...
2
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1answer
462 views

I/O errors on Linux LVM

I have a CentOS 6 box with LVM setup and one of the PVs is a USB disk (I know). One of them is getting the error: Oct 30 10:57:07 alpha01 kernel: lost page write due to I/O error on dm-3 Oct 30 ...
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1answer
408 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 ...
2
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1answer
2k views

VBoxManage: Error: Can't be used as the requested device

I used the soluton from this thread but always i get VirtualBox error: The medium 'lvol.vmdk' can't be used as the requested device type (0x80004005) I've tried all controllers SATA, SCSI, IDE and ...
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3answers
5k views

New menu entry in GRUB2, “file not found” and “you need to load the kernel first” errors

I wanted to add new menu entry to my GRUB2 list. This is how I tried to do this and necessary info: Erros after choosing "Debian Wheezy" menu entry from GRUB2 list: error:file not found error:you ...
2
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1answer
1k views

How much can the space allocated for an LVM snapshot be reduced?

I created an LVM snapshot, then I modified the original logical volume, and now I see that I probably allocated too much space to hold the snapshot. And I want to reclaim some free space by reducing ...
2
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3answers
683 views

Recovery of data on raid5+lvm reiserfs partition, after raid5 problems

I've got a server with 3 sata hard drives. Each has 2 partitions: one small is part of /dev/md0, a raid1 array (/boot), rest is part of a raid5 array (/dev/md1), which is an lvm physical volume. ...
2
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1answer
413 views

curious soft raid 5 setting inconsistency

Lately I bit the bullet and upgrade my OS from Fedora 11 to Fedora 15, and I've been trying very hard to figure out why Fedora 15 can't see the Raid setup that I created in Fedora 11. I think I must ...
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1answer
380 views

LVM tools on raw block copy

I have several raw block copies of disks that have both NTFS and Linux partitions. The parition tables generally have both a Windows NTFS partition and a Linux LVM partition. I need to work on all of ...
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0answers
51 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 ...
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0answers
72 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 ...
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0answers
28 views

recover lvm after loosing partition table

On one of my hard drives had a few physical volumes/partitions and lvm on them. And then I lost partition table. I still have files from /etc/lvm/* how can I recover my data?
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12 views

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 ...
2
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1answer
237 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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1answer
330 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 ...