General :: Backup Data From Hdd's Where Volume Groups Are Duplicated?
Jul 30, 2009
I have couple hard drives from different linux distro's. on the hdd's are logical volumes created. what i want to do is to backup the data from those hdd's. but when I connect some of them and boot up the system it
gives me an error that there are volume group duplicated and it list the UUID. My host system is centos 5. What is the best solution to rename those volume groups or to mount the drives from other systems, so the data will not get lost?
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Jan 6, 2011
All my data is stored on a separate device/partition: a 2TB USB disk with one ext4 partition. I have 3 more USB disks: 1x 1TB + 2x 500GB = 2TB right ? I want to backup my data from the 2TB volume to the (older/slower/cheaper) other volumes combined. I am thinking to use LVM to group the 3 smaller USB disks into one 2TB logical volume and use that to back up the 2TB primary volume. Do you think that is a good idea? In case of disaster I can replace the 2TB primary disk and restore from my 2TB logical volume right ?
What happens if :
I have to replace my internal hard disk and reinstall ubuntu? Can I re-attach the logical volume ?One of the physical volumes of my volume group dies ? Can I remove it and replace it with a new physical volume (bound to have other dimensions) ?Understandably I will loose my backup data?PS: running Ubuntu 10.10 .
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Jan 22, 2010
I'm new to LVM. I use Red Hat and CentOS 5. I'm setting up a database server and I want to setup the local drives for performance. My plan is to have three storage locations, 1st for Linux, 2nd for the application, and 3rd for the data files. Each location will be appropriately redundant. The OS and application drives will be local. Because my goal is to dedicate one spindle for the OS and another for the application, is there a best practice that would say I should create two LVM volume groups.
Each with one logical volume associated with one of the physical partitions or one LVM volume group with two logical volumes each associated with one of the physical partitions? I've read that a physical disk can only belong to one volume group. So if I want to add 70GB to both logical volumes, I could add a single 140GB drive to a single volume group and then add half to each logical volume. If I have two volume groups, I would need to add two additional disks. I may be missing an obvious consideration or be missing a basic concept of LVM.
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Jun 15, 2010
why my data is being duplicated. I store all my data in BOB so the 26.2 GB of data is expected. I don't store anything in .ecryptfs so the 26.2 GB of data is completely unexpected. Could you please explain why this is happening and how to fix it.
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Oct 21, 2010
I am very new to LVM, as well as not especially experienced at linux, and have some questions about how lvm works. A few months back I set up a server running FC10 and tried creating Logical Groups during the the initial setup. We've realized that we are not using all the available space on the physical drive, and I realized that for some reason (I'm thinking this might have been the default?), we initially created two Logical Groups (VolGroup00 and VolGroup01) and it appears two Logical volumes in each (LogVol00 and LogVol01). LogVol00 in VolGroup00 is mapped to /, and the other Group was actually unused. I figure that it would be simplest to just use all this space mapped to /, so I thought the thing to do would be to simply merge VolGroup01 to VolGroup00. I tried this:
[root@office mapper]# vgmerge VolGroup00 VolGroup01
Logical volumes in "VolGroup01" must be inactive
So after a bit of research, I tried this:
[root@office mapper]# vgchange -a n VolGroup01
Can't deactivate volume group "VolGroup01" with 1 open logical volume(s)
So apparently There's an open volume, but I don't know how to go about closing it. I removed the LogVol00 from that group, but LogVol01 won't budge.
[root@office mapper]# lvremove VolGroup01
Can't remove open logical volume "LogVol01"
So how do I go about closing this Volume? At one point, there was some output that told me LogVol01 was being used as swap space. How do I handle that?
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Apr 8, 2009
Dual PII 400, 512Mb with a Promise SuperTrak 100 IDE Array Controller. At present I have only one drive on the controller, configured for 1 JBOD array. I install FC9 with no problem. New partition is created and formatted, Grub is installed, and then... Grub is found and booted, but then I get:
Reading all physical volumes. This may take a while... No volume groups found Volume group "VolGroup00" not found Unable to access resume device (/dev/VolGroup00/LogVol01) mount: could not find filesystem '/dev/root' I can boot in rescue mode, chroot to the installed system. I changed the kernel boot parm "root=/dev/VolGroup00/LogVol00"
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Apr 28, 2009
I've been using LVMs on some of my Linux servers for years without fully "getting" them. Doing a lot of things by rote. As I setup a new RAID though, I realize I don't have to be so rigid. I inherited a mission critical server with five independent disks
Code:
/dev/sdb1 /usr1
/dev/sdc1 /usr2
/dev/sdd1 /usr3
/dev/sde1 /usr4
/dev/sdf1 /usr5
I've bought an external RAID5 box that I plan to migrate the data to and was planning on this layout.
Code:
Method 1
VGLogVol
/dev/sdb1/usr1 -> usr1disk1
/dev/sdc1/usr2 ->usr2disk1
/dev/sdd1/usr3 ->usr3disk1
/dev/sde1/usr4 ->usr4disk1
/dev/sdf1/usr5 ->usr5disk1
Mainly because the 1 to 1 correspondence is easy for me to understand, and what I'm used to. But I realize it doesn't have to be that way, and I could have one VG with all the LVMs as parts of it, i.e.
Code:
Method 2
VGLogVol
/dev/sdb1/usr1 -> arrayusr1
/dev/sdc1/usr2 ->arrayusr2
/dev/sdd1/usr3 ->arrayusr3
/dev/sde1/usr4 ->arrayusr4
/dev/sdf1/usr5 ->arrayusr5
Is there any advantage to one way over the other? Would using one VG with multiple LVs be kind of like "putting all my eggs in one basket"? Do more VGs and LVs introduce unwanted overhead into the LV Mgr that should be frowned upon? If both methods are equal, I go with the method1. Just more clear to me. But now that I understand the second, I could go that way, if there's a compelling reason.
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Jul 1, 2009
I'm experimenting on a new 5.7TB raid we got for one of our servers before it goes into production. I'm carving the space up into Volume Groups and Logical Volumes. Below is some sample output:
[root@server newhome]# vgdisplay
--- Volume group ---
VG Name extraid_sdd1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.82 TB
PE Size 4.00 MB
Total PE 476804
Alloc PE / Size 476804 / 1.82 TB
Free PE / Size 0 / 0
VG UUID LJPJVE-fekS-crS8-uugk-l13z-0NG0-FWv3M3
--- Volume group --
VG Name extraid_sdb1
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 3.64 TB
PE Size 4.00 MB
Total PE 953608
Alloc PE / Size 953608 / 3.64 TB
Free PE / Size 0 / 0
VG UUID kzlLN4-PyrX-LYUS-h1Tc-1S9F-jVV0-XU5tcK
Because I created this, I know that the second 3.64tb Volume Group, extraid_sdb1, is composed of two physical volumes, /dev/sdb1 and /dev/sdc1, each one 1.82TB in size. My question is, if I hadn't made this and had to work backward, how could I discover that info? I can see that the second VG is composed of 2 PVs by the "Cur PV" line. But if I didn't know that they are my /dev/sdb1 and /dev/sdc1, how could I break that out, as well as their sizes? If it matters, this system is running FC6.
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Apr 26, 2010
How to create multiple Logical Groups out of a single Physical Volume? Here is the Physical Volume I have created:
Code:
# pvdisplay
--- Physical volume ---
PV Name /dev/sda9
VG Name myVG1
PV Size 54.88 MB / not usable 2.88 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 13
Free PE 11
Allocated PE 2
PV UUID bon4Ao-vmgC-aP1h-EC9X-w3tN-YXNu-0N2dAw
This is how I am creating a Logical Group out of the above Physical Volume:
Code:
# vgcreate myVG1 -s 4m /dev/sda9
Display:
Code:
# vgdisplay
--- Volume group ---
VG Name myVG1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 52.00 MB
PE Size 4.00 MB
Total PE 13
Alloc PE / Size 2 / 8.00 MB
Free PE / Size 11 / 44.00 MB
VG UUID O6ljYC-bflz-EUTd-nf34-8gYe-Fh39-Bh3cOg
But I am unable to create one more Logical Group out of this Physical Volume. Can we accomplish it? Or do we always extend our current Logical Group to utilize the available space of a Physical Volume?
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Feb 24, 2010
What are the options to backup data to CD/DVD from command line interface. Don't want to use K3B and Nero Linux. Want to backup using "tar" like utility. Please suggest good articles or options.If we can use tar itself to backup data to CD. Then how?For example I want to backup my /home directory to a DVD. I don't want to use GUI tools for this.
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Jun 8, 2010
So i am at the stage of about to install the basic system and am using a derivation of the package management provided by Matthias S. Benkmann. To this end I am using his useradd and groupadd scripts to update the files:
/etc/passwd
/etc/group
My issue is that when I run the commands(created as part of temporary system when installing coreutils):
Code:
/tools/bin/su linux
#then as user
/tools/bin/groups
(here linux is the name of the user) This only returns the user being in the group named after user but not the additional group of 'install' Also, prior to logging in as user, if I use this command as root:
Code:
/tools/bin/groups linux
linux install This then returns that the user is in the correct groups. Lines from relevant files look like:
Code:
#/etc/passwd
linux:x:10000:10000::/usr/src/build:/bin/bash
#/etc/group
[code].....
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Mar 20, 2011
I just imaged my RHEL 4 system that was running on a Dell Poweredge 2950 server using Acronis software and I restored the image to a VmWare virtual machine.
Dell Poweredge 2950 - RAID 5
VmWare - using ESX 4.0
OS - Red Hat Enterprise Linux 4 ES Update 5 x64
kernel - 2.6.9-55.0.9.ELsmp
I'm getting the following when I try to boot on the new virtual machine. I'm thinking it has to do with the fact that it's new hardware and it's having trouble either finding the right drivers or pointing to the correct place.
"No Volume Groups found
Volume Group "Volgroup00" not found
ERROR: /bin/lvm exited abnormally! (pid505)
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!"
I was able to boot into Linux rescue mode using the boot CD. Then I typed:
#chroot /mnt/sysimage
Here's all the info from the commands I typed:
#ldd /bin/bash
libtermcap.so.2 => /lib64/libtermcap.so.2
libdl.so.2 => /lib64/libdl.so.2
libc.so.6 => /lib64/tls/libc.so.6
/lib64/ld-linux-x86-64.so.2
#uname -a
Linux localhost.localdomain 2.6.9-89.EL x86_64
#df -h ....
I've tried the following:
1. mkinitrd -v -f /boot/initrd-2.6.9-55.0.9.EL.img 2.6.9-55.0.9.EL
2. modified the device.map to point to /dev/sda3
3. changed the SCSI controller in Vmware to use BusLogic instead of LSI Logic. (didn't work because I'm running 64 bit.. gave me an error message)
4. grub-install --recheck /dev/sda
5. tried booting to differerent OS versions (i.e. 2.6.9-55.0.6, etc.). I tried all of the versions listed in the boot menu.
None of these worked.
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Jul 21, 2009
I made an image of a server(A). It did not work because It did not see /dev/sda. So I used another cd from indentical sever(B), cd which had work. Then mounted the nfs copy the image over. Server(B) had slightly older version of sles. And its not using lvm. But point is it had appropriate driver in the image cd.
Now situation is, This new image copied ever thing over.(I can mount it using LIVE CD). But When I boot up server it wont see vg volume group. I believe scsi driver is missing.After booting from LIVE CD I chroot in root used yast to add initrd modules, qla2xxx, mptbase, mptscsih(other server(B) had those). Still when I reboot it, it get stuck saying
Code:
No volume groups found
unable to find volume group
waitnit fot device /dev/vg1/root
to appear .... not found device nodes:
.....
......
.....
No root device found. exiting to /bin/sh
sh: cant access tty; job control turned off
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Feb 4, 2011
I am now preparing myself to upgrade lenny to squeeze and decided to do a backup on my system. I used backup-manager to do the job and it worked fine. how do you restore said backup data?
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May 5, 2011
I'm working on a kickstart install to automate a lot of monotony doing installs. When i use the kickstart install i get an error on boot saying "File based locking initialization failed" "no volume groups found". Then it proceeds to boot up with no issues and appears to work just fine. Below is the section of my ks.cfg for creating the partitions: %include /tmp/partition.cfg is included where the partition info usually occurs. The user is prompted in the pre script for how large they would like the partitions to be and then the script below creates the included file with partition info
[code]...
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Jul 7, 2010
I recently resized one of my Logical Volumes that contained 160MB data from 500MB to 6.5GB. After resizing it, I checked the size of the data via 'du -sh' and found that my data had reduced to 143MB.
Fortunately, I backed up the the 160MB of data on another partition before resizing the Logical Volume. I ran 'diff' on both directories holding the 160MB and 143MB, but there was no difference detected.
how come there is a 17MB difference after resizing?
In case you're wondering how I performed my resize, this is what i did:
e2fsck -f /dev/VolGroup01/LogVol00
lvextend -L +6G /dev/VolGroup01/LogVol00
resize2fs -p /dev/VolGroup01/LogVol00
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Mar 4, 2010
I have installed fedora 11 in my system. While installing it asked me encrypted password which i passed. But I forgot that. Now the problem is whenever i boot my system before going to root itself it is asking for volume encrypted password, which as i told you i have forgot. Now i am not able to access my hard disk since it is completely locked. Is there any way to decrypt the password or unlock it. Or if that is not possible can data be recovered,which is my primary requirement..
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Feb 24, 2010
I am a little confused in distinguishing Backup, compressing and Archiving data. Help me to figure out how these can be useful.
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Nov 10, 2010
How to backup my Linux server for preserving data in case if hard disk crashes?
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Apr 30, 2011
My hard disk is failing and I amnot able to boot into the system! Currently I have logged into the system uing Live CD! Any way to compress and back up the data in my hard disk in an efficient way!
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Feb 15, 2010
i setup the following script ro run each night (12am) as a cron on the main server:
if mount | grep -q '/home';
then
rsync -ranv --delete /home/ 138.73.56.12:/home;
[code]....
the main server is running on a dell poweredge 2600. The script rsyncs to a virtualised duplicate running on a hp dl380. when i set this script up and begn running data started going missing from the main server. if new files had been created the files by staff they would go missing, if data was added to existing files prior to activating the script the new changes made to that file would be lost.i just cant understand why this happened. as soon as i turned the script off after a few days it was all back to normal but the data that had gone missing had gone missing.
i just wanted to know if this could be a disk read/write issue, was the script running too soon not allowing data to be written before it can be backed up? could it bee memory? i just dont know. another developed occured after a few days of all this happening, which was one of our hard disk from the main server started mis behaving and flashing amber (attention).
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Apr 28, 2010
I'm using Ubuntu 9.10 (karmic). And, my ~/.pam_environment looks like the following.
PATH DEFAULT=${PATH}:~/Adobe/Reader9/bin:~/texlive/2009/bin/x86_64-linux
GIT_EDITOR DEFAULT=vim
MANPATH DEFAULT=${MANPATH}:~/texlive/2009/texmf/doc/man
INFOPATH DEFAULT=${INFOPATH}:~/texlive/2009/texmf/doc/info
But, echo $PATH returns me duplicated entries as the following.
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:~/Adobe/Reader9/bin:~/texlive/2009/bin/x86_64-linux:~/Adobe/Reader9/bin:~/texlive/2009/bin/x86_64-linux
I've tried replacing DEFAULT by OVERRIDE in my ~/.pam_environment file. But, that didn't help.
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Jul 2, 2011
Adding a kernel parameter to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nodmraid" (not 100% it should go there grub2 is new to me, but that is another story) I noticed the following error when running update-grub.
ERROR: ddf1: wrong # of devices in RAID set "ddf1_Series1" [1/2] on /dev/sdb No volume groups found
Now I have not a clue where it is getting ddf1_Series1 from.sdf1 is part of a RAID1 group that has mdadm RAID1 > luks > LVM
md6 : active raid1 sdi1[1] sdf1[0]
1465135936 blocks [2/2] [UU]
bitmap: 0/175 pages [0KB], 4096KB chunk
Errors bug me.. as I am new to grub2 was wondering if anyone has an insight into the error / where to investigate Still reading the grub2 / grub manuals.
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May 24, 2010
My execution environment is Linux steamboy 2.6.31-21-generic-pae #59-Ubuntu SMP.If I log in and run a program, the program works properly. The program is a shell script, which executes an environment file, so that path and library settings point correctly.If I have cron run the same program as the same user who logged in, one of the libraries cannot be found. I have sourced .bashrc and the same environment setting file, even though .bashrc executes the same environment file . /home/amr/bin/informix_env.sh
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Feb 4, 2011
I already know of a work around to fix this problem, but I guess my question is why is this not working as expected? I am using a Windows Server 2008 R2 Active Directory for authentication.
I have run auth-client-config for the ldap profile and pam-auth-update. When running getent passwd, I get a list of both the local users and the users in the active directory (with populated information in the Unix schema extension). When running getent group I get a list of both the local groups and the groups in the active directory (with populated information in the Unix schema extension).
Interestingly enough, though, when I run su DOMAINUSER, after the prompt for the password I get an authentication error. In /var/log/auth.log I can see an entry with pam_ldap: missing "host" in file "/etc/ldap.conf". The SRV records in the DNS servers resolve correctly. I've checked this with nslookup and I have seen the records within my zone file. Obviously if the ldap.conf file is working with getent and the ldap server is resolving from the SRV records, it is working fine.
The interesting part is that the Windows Server 2008 R2 AD machine shows in the event viewer that there was a successful authentication, yet the Ubuntu box says no. When I add the host within the ldap.conf file, everything works...getent and the actual authentication, either initial login or su.
[Code]...
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May 2, 2011
System76 laptop, 10.04, 320GB HDD, VMware with Win7 in one VM; want to use Clonezilla as am using it to back up (bare metal backup image) another older smaller dual-boot Ubuntu/XP machine. This System76 laptop is a work machine that I control; the Win7 VM only does a couple of things but they're necessary for work and I don't want to lose the configuration. The reason for the bare metal backup is so if I have to, I can restore and get back to work - something I've had to do on some previous occasions back when I used Windows. Data is no problem - I back that up separately on an hourly basis.
My question is what FS to use on the backup drive; for instance, for the dual-boot XP/Linux work machine I'm currently backing up, I'm using a 30GB external HDD formatted in FAT32. That's OK because 30GB is below the limit for FAT32. But for the newer laptop I'll need a much bigger backup partition. I chose FAT32 for the old one because I know everything on the computer being backed up, Windows & Linux both, is compatible with it. But what FS should I use to back up the new laptop, considering that I'll be backing up the Win7 VM as well as the main Linux part of the machine? I plan to use a backup partition of about 160GB. Could I format it NTFS and have it work with Ubuntu 10.04? Or, conversely, if I format it EXT, will it back up the Win7 VM OK?
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Jan 12, 2011
Does anybody know any programs that might facilitate the spanning of a hard drive over multiple DVDs? I would like to backup a windows system that may have become corrupted however; but I don't know how to automatically span the files over multiple DVDs (which is what I'd like to do.) I may or may not use Ubuntu, but does anyone know any good applications for this?
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Oct 12, 2010
I am currently trying to set up a Samba domain server. In the Samba-HOWTO-Collection I found an
example file.(Point 3.3.3.1) In the explanations of the example below, the author says I need to map UNIX Groups to NT Groups. He writes a shell-script of how one could do it, but when I copy it and then execute it, I get the error:
Bad option: rid=512
Bad option: rid=513
Bad option: rid=514
The other groups do get mapped, just the Domain Admins, Domain Users and Domain Guests dont. This is the shell from the HOWTO:
#!/bin/bash
#### Shell-Skript f ̈r sp ̈tere Verwendung aufbewahren
net groupmap modify ntgroup="Domain Admins" unixgroup=ntadmins rid=512
net groupmap modify ntgroup="Domain Users" unixgroup=users rid=513
net groupmap modify ntgroup="Domain Guests" unixgroup=nobody rid=514
[Code]...
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Aug 19, 2010
Now, i thinking solution: Backup Data on Server CentOS to HDD Box. When server error, i can restore Server from HDD Box.
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Dec 26, 2010
You'd think that with two backups of all my data, which are syncronised twice weekly - that I'd be pretty safe. Fine and good until in a reorganisation of my documents folders,I delete a bunch of files - and don't notice until after I've run the backup - so they're deleted from the backups as well. Cue me beating myself around the head with the keyboard a few times about a week later when I realised.I'd advise against doing that if you have a keyboard like the IBM Model-M - it hurts.Okay, so I figure it's at least worth having a stab at recovering this data. The external harddrive's not had anything written to it since then, so is probably the best candidate. It's formatted as an NTFS volume (1.5Tb).
Now, I DO have a copy of R-Studio for Windows which I bought and paid for a few years agowhen XP managed to destroy itself and the file structure on the harddrive when it fell over installing SP2 (this was the event which lead ultimately to me switching to Ubuntu).I've found this to work quite well, though the initial scan does take a while.nfortunately, it does NOT seem to work from within Ubuntu through Wine. It runs, but can't see any drives. The only Windows environment I have access to now is Vista, andR-Studio seems to hang after running for an hour or so under Vista.
Are there any tools - preferably simple enough that I can get my head around them - which I can use from within Ubuntu to have a scrub through an NTFS drive to look for and otentially recover deleted data? I've found several tools which claim to recover things from ext3/4 drives from Windows - but not the other way around!There are a fair selection of filetypes involved here, some word documents, probably most of interest to me though are some old videos, mostly <5Mb taken on my old phone camera from university. Nothing really mission critical...but memories nevertheless.
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