In computer storage, Logical Volume Management or LVM provides a method of allocating space on mass-storage devices that is more flexible than conventional partitioning schemes.
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LVM thin provisioning
I am looking to create a group of thin provisioned LVs using LVM.
Is it possible to create a volume group in which every logical volume created is by default thin provisioned, or perhaps there is ...
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0answers
10 views
Why does Xen fail to create domUs/start the virtual network interface?
I have received two errors while trying to create a new domU on Xen. First, I received this error:
Unable to complete install: 'POST operation failed: xend_post: error from xen daemon: (xend.err ...
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2answers
58 views
Hybrid RAID with LVM + mdadm
So I've been looking Synology and their idea of Hybrid RAID to make mixed drive RAID arrays both fault tolerant and efficient.
So, I'm testing an idea (performance isn't a concern here), with a mixed ...
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1answer
39 views
Grub can't find Xen multiboot file
I am running Debian Wheezy on a software RAID 0 with LVM. I'm trying to get Xen to work but grub refuses to boot in it. I installed Xen by following the instructions here: http://wiki.debian.org/Xen
...
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2answers
56 views
Are ext4 RAID5 tuning options useful under LVM?
I'm setting up a system with a system with a mdadm RAID5 which is the sole PV for a VG which hosts 4 LVs.
When I make the filesystem, would the mkfs.ext4 -E option be useful? Or is its effect not ...
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1answer
29 views
“LV Status NOT available” after converting root from lvm2 to lvm2+raid1 (lvconvert --type raid1)
I just converted by lvm2 root filesystem from linear lvm2 (single HDD:sda) to lvm2 raid1 (using lvconvert -m1 --type raid1 /dev/ubuntu/root /dev/sdb5 command). But after this conversion I can't boot ...
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2answers
36 views
ext3 converted to ext4 still being mounted as ext3
I have a somewhat bizzare problem at the moment with my Debian-system (mainly testing).
I used to have a root-partition on lvm that was formatted as ext3.
I now booted a live-system and converted ...
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1answer
29 views
Recover data after lvreduce on “/”
I accidentally ran lvreduce on / instead of "/home" on a RHEL 5.9 system that unfortunately had a lot of code that was not backed up, and the system will not boot now obviously.
What is the best way ...
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1answer
29 views
Easiest way to change directory into its own logical volume in LVM2
I have a dir called /mydir on logical volume /dev/vg1/lv_root ( / )
var is on its own logical volume, so is opt and /usr.. If I have free space in the volume group, what is the easiest way to change ...
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0answers
27 views
Trouble resizing LVM volume after expanding Areca 1280 RAID 6
My problem is very similar to Trouble resizing LVM volume after expanding Areca 1220 RAID 5 array; however, my 2 LVs are created on a unpartitioned raid volume:
# pvdisplay
--- Physical volume ---
...
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2answers
47 views
lvextend on a VM ubuntu server
Removing question as some people are just being negative, moderators feel free to delete this.
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1answer
61 views
Using LVM to extend 2TB diskd on a linux VM?
Currently have mounted on one of my web servers a linux box on VMware with two external drives in. These are both 2TB drives which is the limit to what you can add into VMware. I want to use lvm to ...
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1answer
30 views
Storage virtual machine. LVM or loop devices? [closed]
Actual situation:
I'm the administrator of a virtual machine. The virtual machine is a Debian.
This machine will be mainly a storage machine with different services (svn, ftp... ), and a webserver. ...
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0answers
63 views
LVM DRBD Shared between nodes proxmox
Context :
I have proxmox cluster with the volume group shared with drbd for the VM - KVM.
I have a problem with drbd. Indeed, when a node disconnect, the associate link between the differents nodes ...
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2answers
79 views
Used vgextend/lvextend to add addtional 8GB space but it is not reflected in df output
I have created an instance of ubuntu VM in VirtualBox. At the beginning I have only allocated 7GB for the storage and the VM has now run out of space.
First I added another 8GB (/dev/sdb) to the VM ...
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2answers
37 views
mount a partition on an lvm partition
I have a xen dom0 server (named virtserver), which contains a guest machine, let's call it "virtguest".
The virtguest used to be a physical machine earlier, and the whole old disk (with several ...
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0answers
48 views
XenServer additional Local Storage : LVHD or Ext3
I've searched for a clear comparison between LVM (LVHD)-backed Local Storage and Ext3-backed Local Storage on XenServer, but to no avail.
According to http://innitec.wordpress.com/category/xenserver/ ...
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1answer
34 views
KVM copy contents of image into raw smaller LVM2 partition
I have a KVM guest, running on a KVM host...both Gentoo Linux.
The guest is called webserver.img. It is 21 gigs large, but I am only using 5 gigs inside the image.
I want to make a logical volume ...
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1answer
60 views
Snapshot a KVM guest with non-file storage
I am preparing at least one Windows 7 guest on a KVM Linux (ubuntu) host. I have made an LVM-based storage pool which I would like to use. My main concern is snapshots. The disk-image will be ...
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1answer
49 views
LVM mirror with data and logs mirrored on same 2 devices
I'm trying to set LVM mirroring with only 2 devices. It works perfecly when I add third device for mirrorlog, or use corelog. But with only 2 devices and --alloc anywhere LVM nearly always creates ...
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1answer
38 views
Using LTFS volumes as PV's in LVM [closed]
Has anyone tried using LTFS volumes as PV's in LVM? Would make a tape-NAS more flexible than, for example, the IBM approach where "each LTFS-formatted tape cartridge in the library appears as a ...
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1answer
52 views
How does data storage on Amazon EC2 work especially for databases?
I've been playing around with Amazon's Web Services for over a year now, however I don't quite understand how it works. When I for example select an AMI of my choice from the EC2 console and I ...
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1answer
78 views
VMWare ESXi: to extend a partition or create a new drive?
Is it better to extend an existing partition or to create a new drive in VMWare ESXi? I'll be using LVM to put the drive in an existing volume group and to extend a SAN mount point. Which would be ...
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1answer
43 views
lvconvert --merge how to undo?
I have created a script for users who work on KVM virtual machines to be able to perform lvm snapshots on the logical volumes where their VMs are installed. Snapshot restores are performed via ...
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0answers
28 views
udev rule for disconnection and hibernate/suspend
I have an external hard drive which contains different GPT partitions. One of them is a LVM partition. This partition is contained in a LVM volume group (called "volga"), which in turns splits into ...
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1answer
97 views
LVM: “Couldn't find device with uuid” yet blkid finds the UUID
I have a SLES 11.2 PPC (3.0.58-0.6.6-ppc64) system that lost track of its volume group (containing LVs with data that is not critical but would be rather nice to get back). The disks are connected ...
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1answer
30 views
LVM Snapshot confusion
I think I understand some of the lvm snapshot concept, but am confused about one last thing. After you take the snapshot, if you don't mount it, will it be active? What I really want to know is will ...
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2answers
66 views
Why does my lvm physical volume have significantly less space than the partition it contains?
I'm on centOS 6.4.
I have a 39TB hardware RAID configured as RAID 6.
I created a single 39TB partition with parted. It reports:
(parted) print
...
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4answers
51 views
What does an LVM2 Snapshot contain? [duplicate]
Everything I read makes me think an lvm snapshot is a direct copy of the logical volume that was snapshot(ed), but how can that be when it takes 10 seconds to snapshot a 90 gig logical volume? If I ...
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2answers
80 views
Adding disks to and resizing a LVM
I'm managing a virtual cloud server on EC2 for a client which has the requirement of expandable storage. Currently, I have a 1TB EBS drive mounted at /mnt which I need to expand. Since 1TB is the ...
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0answers
67 views
KVM: LVM snapshots on qcow2 images
I have an LVM2 logical volume that is formatted with ext4 and mounted to a directory on /opt. On that volume is a qcow2 KVM image for a Windows 7 guest. Can I snapshot the LVM logical volume for a ...
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2answers
145 views
How to determine optimal size for LVM snapshot?
I'd like to create a backup script that uses LVM snapshots during backup. This script will run on several Linux machines.
I'd like to avoid creating snapshot that is too small and gets full during ...
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1answer
35 views
How to resize LVM group wheen 4 partitions already in system?
Centos, I have already expanded Virtual disk in Vmware, now i need to add additional space to LVM Group but most tutorials out there are saying to create new partition and add it to LVM. Since there ...
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2answers
33 views
Setting up LVM Volume Groups… hang
My Debian 7 System dosn't boot anymore. The boot stop with a kernel message like thisMy Debian 7 System dosn't boot anymore. The boot stop with a kernel message like this:
[.....] Setting up LVM ...
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1answer
30 views
LVM reduce from one Logical volume and add it to another
i am having two volume groups vg1 and vg2
on vg1 i am having two Logical volumes LV1 and LV2 ,LV1 is full and LV2 is having more than 60% free space.
Is it possible to reduce Lv2 and then using that ...
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1answer
35 views
identical drivers different pv size
i've got strange situation with identical drives:
pvdisplay
--- Physical volume ---
PV Name /dev/sda5
VG Name group1
PV Size 465.52 GiB / not ...
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0answers
25 views
mv cause file missing, how can I find them back
my server : centos 6 with xen4
the vm352 crashed, so I want to reinstall OS for this vps,
before this , I backup my important files to other lvm ( vm492_img )
but when reinstalled, I moved files ...
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2answers
46 views
Physical disks comprising a Volume in RHEL
How do I list the physical disks and associated information (disk model, size, etc.) for all disks that are members of a physical volume in RHEL?
For example, if I do I "pvscan", I get the following ...
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0answers
48 views
Ubuntu 10.04 Server stuck at grub prompt
I have a virtualized server running 10.04 LTS that is no longer booting. We had a number of issues with our SAN that abruptly disconnected the storage from the virtual machine infrastructure and ...
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0answers
30 views
LVM+MongoDB. Dropping in speed of backup creation
Till recent time we have been making mongo backups archiving LVM snapshot on hidden SECONDARY server with RAID10 on SAS disks.
Currently operation on making snapshot from volume with 500 Gb of data ...
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1answer
33 views
Are blocks that are read from LVM kept in Linux's block cache?
Does Linux keep blocks that are read from an LVM logical volume in the block cache as it does with blocks read from a "regular" block device or is the IO direct?
Also, do the usual buffering ...
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1answer
115 views
Logical Volume Recovery
I have a machine with 180 or so logical volumes as well as an OS partition that were wiped out with a format when reinstalling centOS6. I made a terrible mistake, not being familiar with the interface ...
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1answer
77 views
Does Ubuntu 12.04 LTS support booting from RAID 6?
I'm setting up a new Ubuntu server using 12.04.2 LTS. I have five drives that I am setting up in a RAID 6 with LVM. Can I use this for bootup? Or should I make a separate RAID 1 partition for bootup ...
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2answers
68 views
can't resize root at Ubuntu Server 12.04 LTS
I've done lvresize -L 264G 101/root (was 15GB) but /dev/mapper/101-root shows 13Gb. What am I doing wrong? I really appreciate the help!
root@server1:/home/user# df -h
Filesystem Size ...
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1answer
60 views
Recovery RAID array LVM
I have a NAS, the unit became unresponsive so after some research I pulled the drives out of the box, and hooked them up to my Ubuntu box. I now see all 4 drives, and all 4 partitions on the drives. ...
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2answers
132 views
How to increase Free PE in LVM physical volume?
I use Proxmox 2.2 for making OpenVZ containers.
It ships with a tool called vzdump that can create backups of OpenVZ containers on the fly. It uses snapshot functionality of LVM to create temporary ...
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1answer
50 views
how to resize ufs partition on linux
is there a way to resize a lvm partition after processing dd command?
/dev/vg0/disk1 is 1G
/dev/vg0/disk2 is 5G
after a dd partition, the size of /dev/vg0/disk2 become 1G.
dd if=/dev/vg0/disk1 ...
2
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1answer
124 views
kickstart partitioning error with LVM
In Kickstart, I keep on getting the error;
Adding this partition would not leave enough disk space for already
allocated logical volumes in vg_ibus
I do not get why I am getting this error. ...
1
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1answer
91 views
How to automount lvm on startup ubuntu?
I'll start some background that can be skipped:
I have an ubuntu machine that I installed some time ago with the default partitioning on a an 80GB hard drive. The machine runs has rTorrent that starts ...
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1answer
46 views
How to create new logical volume by taking the space from an existing one
I am new to the world of logical volumes. I have installed a Linux (CentOS), and the installer created an 50 GB root logical volume (mounted at /), and a 475 GB home logical volume (mounted under ...
