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

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2answers
452 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 ...
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2answers
20 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
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0answers
19 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 ...
3
votes
1answer
611 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 ...
25
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6answers
16k 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
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1answer
48 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 ...
2
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0answers
44 views

Corrupt LVM metadata header after kernel update

I'm running Debian Wheezy (Linux wheezy3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u1 x86_64 GNU/Linux) as an encrypted LVM with hardware raid 1 (Adaptec 6405E) on a supermicro server. I was encounting ...
0
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3answers
116 views

Mount encrypted volume in Debian

I was given a HDD that was encrypted using dm-crypt and I'd like to mount it as /disk2 preferably having the decryption password stored in a file, so I won't have to enter the passphrase when booting, ...
2
votes
1answer
62 views

RAID1 that can be enlarged when adding a new disk: convert to lvm --type raid1? [closed]

For the last ten years, I have been making inexpensive servers for small businesses. Each server has two identical drives mirrored with raid1. Later, SATA became available, then eSATA. In the ...
3
votes
2answers
2k views

Install grub on LV container for VM

I'm having difficult time installing grub in LVM LV container for a VM. This is the partition table: # parted /dev/mgtvg/linux2os print Model: Linux device-mapper (linear) (dm) Disk /dev/dm-7: 129GB ...
5
votes
2answers
210 views

Where does LVM store its configuration?

I am trying to understand how / where LVM stores its configuration data. Does pvcreate /dev/sdb write any metadata to /dev/sdb? if so what is written? Where does vgcreate data /dev/sdb /dev/sdc ...
0
votes
1answer
530 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 ...
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 ...
6
votes
3answers
7k 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 ...
0
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2answers
560 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 ...
10
votes
4answers
28k 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 ...
7
votes
5answers
7k views

Partition manager that can handle LVM?

I have been looking but neither Gparted nor KDE Partition Manager can handle LVM. Working with the command line is probably fine but it would be clearer to have a GUI tool here. Does such thing exist? ...
0
votes
1answer
57 views

Mounting a Partition & recovery

To keep the story short, i am taking the easy way out and now trying to mount a partition to recover a few text documents. I tried to 'sudo mount -t ext4 /dev/sda4 /mnt' but received this error sudo ...
0
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0answers
19 views

e2fsck block bitmaps

What exactly are block bitmaps? Why would I get the following error: The filesystem size (according to the superblock) is 1219824640 blocks The physical size of the device is 731447296 blocks Either ...
1
vote
1answer
3k 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 ...
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0answers
48 views

Booting Gentoo on LVM inside LUKS with gpg encrypted keyfile

I'm trying to install Gentoo on LVM logical volume inside LUKS container encrypted with key file encrypted by GPG with passphrase. Everything was going smoothly until I tried to boot. I'm building the ...
7
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2answers
1k views

RAIDing with LVM vs MDRAID - pros and cons?

In his answer to the question "mixed raid types", HBruijn suggests using LVM to implement RAID vs the more standard MDRAID. After a little investigation, it seems LVM also supports RAID ...
45
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3answers
33k views

Does LVM impact performance?

I have to migrate a few servers to Linux, and one important aspect that I need to evaluate is that my new host system must have elastic storage capacity. Naturally, doing some basic research, I came ...
2
votes
1answer
483 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 ...
0
votes
1answer
34 views

Hot swapping a mirrored disk on a HP UX

I'm trying to do a hot swap on a mirrored lvm. $ vgdisplay -v /dev/vg00 --- Physical volumes --- PV Name /dev/dsk/c2t0d0s2 PV Status unavailable Total PE ...
6
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0answers
69 views

Can Grub2 multi-boot LUKS/LVM distros with only one boot partition?

There are many tutorials on the internet for multi-booting unencrypted distros using a single boot partition and chainloading. For example, booting 145 OSes. Likewise, there are tutorials for ...
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0answers
19 views

LVM issues and questions

I've got a NAS configured with LVM where one of the volumes is giving errors like this: vgscan reading all physical volumes. This may take a while... /dev/ElkhornC7VG1/idisk5: read failed ...
5
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1answer
168 views

“Found duplicate PV”

SERVER:~ # pvs Found duplicate PV Wb0b2UTCKtpUtSki0k2NnIB24qNj4CEP: using /dev/mapper/36005076304ffc2500000000000004903 not /dev/mapper/36005076304ffc2990000000000004903 PV ...
0
votes
1answer
53 views

'No such file or directory' when I am trying to format Logical Volume

I am trying to create Logical Volume on CentOS 7 on EC2 instance. After attaching the volume I am creating partition using fdisk, then I am starting the Logical Volume creation: pvcreate /dev/xvda1 ...
3
votes
1answer
1k views

dual booting centos5.5 and fedora

I already have CentOS 5.5 on my system whose hard disk is ~500GB. I have tried to dual boot with Fedora 16. while installing fedora 16 I have created a ~250GB and ~4GB partitions for "/" and swap. The ...
4
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0answers
257 views

Why does hdparm see two different values for the size of a drive?

I have a 1 TB drive attached via USB. It contains an LVM physical volume filling the entire device (without any partition table). When I tried to extend a logical volume by using the entire PV, the ...
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0answers
152 views

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 ...
1
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1answer
59 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
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1answer
67 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 ...
2
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0answers
141 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 ...
2
votes
1answer
55 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 ...
1
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1answer
33 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 ...
0
votes
1answer
30 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 ...
0
votes
1answer
63 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 ...
1
vote
1answer
287 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, ...
3
votes
1answer
93 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 ...
3
votes
0answers
143 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 ...
5
votes
2answers
298 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 ...
4
votes
3answers
131 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. ...
2
votes
3answers
336 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 ...
0
votes
1answer
30 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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1answer
1k 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% / ...
0
votes
2answers
706 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). ...
3
votes
1answer
255 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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3answers
805 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 ...