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This article will describe on how to move or migrate LVM and volume group from one server to another.<\/p>\nThis article will describe on how to move or migrate LVM and volume group from one server to another.<\/p>\n
If you are working in a production environment then you have to know about the software disk management and all the methods to provide flexibility in storage management.<\/p>\n
LVM stand for logical volume management. It is a tool to manage and provides a higher-level view of the disk storage.<\/p>\n
Below tutorial will be very useful for system administrators who have problems on the linux operating system and want to mount the mounted partition to other systems.<\/p>\n
This should be the most simple recovery strategy if we run Linux in VMware virtual machines.<\/p>\n
Migrating LVM or Volume Group to new server should be the fastest way to access the important linux partition that may contains user’s data or important configuration files.<\/p>\n
1. Add vdisk to new virtual machine.<\/p>\n
a) Click “Add” to proceed :<\/p>\n
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b) Select “Hard Disk” device type :<\/p>\n
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c) Please choose “Use and existing virtual disk” :<\/p>\n
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d) Browse to vdisk location :<\/p>\n
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e) Click Next to proceed :<\/p>\n
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f) Click finish :<\/p>\n
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g) Finally click “OK” to complete :<\/p>\n
![\"Migrate](\"https:\/\/webhostinggeeks.com\/howto\/wp-content\/uploads\/2016\/02\/add-LVM-to-new-server-7.png\")
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2. Once the vdisk as been added to new Linux server, please proceed to rescan the linux VM.<\/p>\n
a) Identify host bus number :<\/p>\n
# ls \/sys\/class\/scsi_host\/\nhost0 host1 host2\n<\/pre>\nb) Rescan the SCSI Bus to Add a SCSI Devices :<\/p>\n
# echo \"- - -\" > \/sys\/class\/scsi_host\/host0\/scan\n# echo \"- - -\" > \/sys\/class\/scsi_host\/host1\/scan\n# echo \"- - -\" > \/sys\/class\/scsi_host\/host2\/scan\n<\/pre>\n3. Check the new disk. The second vdisk by default will be recognised as \/dev\/sdb. Since the partition type has been formatted as LVM on the previous system, it will show Id “8e” if you run fdisk command.<\/p>\n
# fdisk -l\n..\n..\n\nDisk \/dev\/sdb: 10.7 GB, 10737418240 bytes\n255 heads, 63 sectors\/track, 1305 cylinders\nUnits = cylinders of 16065 * 512 = 8225280 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\nDisk identifier: 0xce931872\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 1 1305 10482381 8e Linux LVM\n<\/pre>\nThere are two method to register and activate the LVM and volume group into new linux server. Proceed to steps 4 – 9 for Method 1. Go to step 10 for Method 2.<\/p>\n
4. Use lvscan to scans all known volume groups or all supported LVM block devices in the system for defined Logical Volumes. The output consists of one line for each Logical Volume indicating whether it is active or inactive :<\/p>\n
# lvscan\n inactive '\/dev\/vg_newlvm\/newvol' [9.99 GiB] inherit\n ACTIVE '\/dev\/vg_centos66\/lv_root' [30.00 GiB] inherit\n ACTIVE '\/dev\/vg_centos66\/lv_swap' [8.00 GiB] inherit\n<\/pre>\n5. Check existing volume group and logical volume:<\/p>\n
# vgscan\n Reading all physical volumes. This may take a while...\n Found volume group \"vg_newlvm\" using metadata type lvm2\n Found volume group \"vg_centos66\" using metadata type lvm2\n<\/pre>\nOne of the logical volume in “vg_newlvm” volume group still inactive status.<\/p>\n
# lvscan\ninactive '\/dev\/vg_newlvm\/newvol' [9.99 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_root' [17.51 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_swap' [2.00 GiB] inherit\n<\/pre>\n6. Export the volume group “vg_newlvm” :<\/p>\n
# vgexport vg_newlvm\nVolume group \"vg_newlvm\" successfully exported\n<\/pre>\n7. Then import volume group “vg_newlvm”:<\/p>\n
# vgimport vg_newlvm\nVolume group \"vg_newlvm\" successfully imported\n<\/pre>\n8. To activate volume groups “vg_newlvm”, run the following command :<\/p>\n
# vgchange -ay vg_newlvm\n1 logical volume(s) in volume group \"vg_newlvm\" now active\n<\/pre>\n9. Check again updated logical volume and volume group status :<\/p>\n
# lvscan\n ACTIVE '\/dev\/vg_newlvm\/newvol' [9.99 GiB] inherit\n ACTIVE '\/dev\/vg_centos66\/lv_root' [17.51 GiB] inherit\n ACTIVE '\/dev\/vg_centos66\/lv_swap' [2.00 GiB] inherit\n<\/pre>\nMethod 2 :<\/p>\n
10. The fastest method to activate the migrated LVM or Volume Group are as below :<\/p>\n
# lvscan\ninactive '\/dev\/vg_newlvm\/newvol' [9.99 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_root' [17.51 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_swap' [2.00 GiB] inherit\n<\/pre>\nUse lvchange command to activate the LVM.<\/p>\n
# lvchange -ay \/dev\/vg_newlvm\/newvol\n<\/pre>\n# lvscan\nACTIVE '\/dev\/vg_newlvm\/newvol' [9.99 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_root' [17.51 GiB] inherit\nACTIVE '\/dev\/vg_centos66\/lv_swap' [2.00 GiB] inherit\n<\/pre>\n11. Create \/data folder :<\/p>\n
# mkdir -p \/data\n<\/pre>\n12. Mount the migrated LVM to \/data<\/p>\n
# mount \/dev\/vg_newlvm\/newvol \/data\n<\/pre>\n13. Verify \/date to use migrated LVM :<\/p>\n
# df -lh\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/mapper\/vg_centos66-lv_root\n 18G 5.2G 12G 32% \/\ntmpfs 939M 0 939M 0% \/dev\/shm\n\/dev\/sda1 477M 67M 385M 15% \/boot\n\/dev\/mapper\/vg_newlvm-newvol\n 9.8G 32M 9.2G 1% \/data\n<\/pre>\n","protected":false},"excerpt":{"rendered":"This article will describe on how to move or migrate LVM and volume group from one server to another. If you are working in a production environment then you have…<\/p>\n","protected":false},"author":6,"featured_media":6674,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[1002],"tags":[1536,1556],"class_list":["post-6610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lvm","tag-linux","tag-lvm"],"_links":{"self":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/6610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/comments?post=6610"}],"version-history":[{"count":0,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/6610\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media\/6674"}],"wp:attachment":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media?parent=6610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/categories?post=6610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/tags?post=6610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}