This post will covers the steps to create additional Logical volume manager (LVM) on CentOS 6.3. This will very useful when the production system facing run out of disk space to store data. Sometimes there is another request for them to create additional LVM for new system or to store data. It is possible to perform this task if that system administrator has the right skill on linux. Otherwise, they will put themselves and the organization in the disaster or risk as working with the system\u2019s data is on of the most critical job that must be perform with the right steps and skills. Follow below steps :<\/p>\n
1. Assumed that second disk has been added called \/dev\/sdb<\/strong>. Create new partition for \/dev\/sdb<\/strong> using below command : <\/p>\n 2. Convert this disk into a physical volume :<\/p>\n Display the physical volume :<\/p>\n 3. With the physical volume created we now need to create new volume group for it. In this case i will give the volume group name vg_data<\/strong>.<\/p>\n Display the volume group :<\/p>\n 4. Create logical volumes with the name of centos63_vol<\/strong> into vg_data<\/strong> volume group :<\/p>\n Display logical volume :<\/p>\n 5. Format the LVM using mke2fs with -j switch command :<\/p>\n 6. Create a mount point for the newly created logical volume :<\/p>\n 7. Define mount point to use this partitions :<\/p>\n 8. Modify \/etc\/fstab<\/strong> and add the following:<\/p>\n 9. Mount the newly created logical volume :<\/p>\n 10. The newly created logical volume will now mount automatically each time the system is booted.<\/p>\n This post will covers the steps to create additional Logical volume manager (LVM) on CentOS 6.3. This will very useful when the production system facing run out of disk space…<\/p>\n","protected":false},"author":6,"featured_media":3620,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[2055,1002],"tags":[1254,1536,1546,1554,1555,1556,1713],"class_list":["post-3985","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-centos","category-lvm","tag-centos-6-3","tag-linux","tag-linux-utilities","tag-logical-volume","tag-logical-volume-manager","tag-lvm","tag-rhel"],"_links":{"self":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/3985","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=3985"}],"version-history":[{"count":0,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/3985\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media\/3620"}],"wp:attachment":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media?parent=3985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/categories?post=3985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/tags?post=3985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n[root@centos63 ~]# fdisk \/dev\/sdb\nDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel\nBuilding a new DOS disklabel with disk identifier 0xd29f2d59.\nChanges will remain in memory only, until you decide to write them.\nAfter that, of course, the previous content won't be recoverable.\n\nWarning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)\n\nWARNING: DOS-compatible mode is deprecated. It's strongly recommended to\n switch off the mode (command 'c') and change display units to\n sectors (command 'u').\n\nCommand (m for help): n\nCommand action\n e extended\n p primary partition (1-4)\np\nPartition number (1-4): 1\nFirst cylinder (1-652, default 1):\nUsing default value 1\nLast cylinder, +cylinders or +size{K,M,G} (1-652, default 652):\nUsing default value 652\n\nCommand (m for help): p\n\nDisk \/dev\/sdb: 5368 MB, 5368709120 bytes\n255 heads, 63 sectors\/track, 652 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: 0xd29f2d59\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 1 652 5237158+ 83 Linux\n\nCommand (m for help): t\nSelected partition 1\nHex code (type L to list codes): 8e\nChanged system type of partition 1 to 8e (Linux LVM)\n\nCommand (m for help): p\n\nDisk \/dev\/sdb: 5368 MB, 5368709120 bytes\n255 heads, 63 sectors\/track, 652 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: 0xd29f2d59\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 1 652 5237158+ 8e Linux LVM\n\nCommand (m for help): w\nThe partition table has been altered!\n\nCalling ioctl() to re-read partition table.\nSyncing disks.\n\n<\/pre>\n\n[root@centos63 ~]# pvcreate \/dev\/sdb1\n Writing physical volume data to disk \"\/dev\/sdb1\"\n Physical volume \"\/dev\/sdb1\" successfully created\n<\/pre>\n
\n[root@centos63 ~]# pvdisplay\n --- Physical volume ---\n PV Name \/dev\/sda2\n VG Name vg_centos63\n PV Size 7.51 GiB \/ not usable 3.00 MiB\n Allocatable yes (but full)\n PE Size 4.00 MiB\n Total PE 1922\n Free PE 0\n Allocated PE 1922\n PV UUID 521faS-HW2C-nUrs-yI1E-4OO9-eLmj-1e3bGW\n\n \"\/dev\/sdb1\" is a new physical volume of \"4.99 GiB\"\n --- NEW Physical volume ---\n PV Name \/dev\/sdb1\n VG Name\n PV Size 4.99 GiB\n Allocatable NO\n PE Size 0\n Total PE 0\n Free PE 0\n Allocated PE 0\n PV UUID qTmTeq-8qoL-xxEk-Dj5V-zOjl-vEag-P6Jl7L\n<\/pre>\n
\n[root@centos63 ~]# vgcreate vg_data \/dev\/sdb1\n Volume group \"vg_data\" successfully created\n<\/pre>\n
\n[root@centos63 ~]# vgdisplay\n --- Volume group ---\n VG Name vg_data\n System ID\n Format lvm2\n Metadata Areas 1\n Metadata Sequence No 1\n VG Access read\/write\n VG Status resizable\n MAX LV 0\n Cur LV 0\n Open LV 0\n Max PV 0\n Cur PV 1\n Act PV 1\n VG Size 4.99 GiB\n PE Size 4.00 MiB\n Total PE 1278\n Alloc PE \/ Size 0 \/ 0\n Free PE \/ Size 1278 \/ 4.99 GiB\n VG UUID YV3IYN-3CF9-3Yd1-69ue-wcq4-0UKk-Zk49Vk\n\n --- Volume group ---\n VG Name vg_centos63\n System ID\n Format lvm2\n Metadata Areas 1\n Metadata Sequence No 3\n VG Access read\/write\n VG Status resizable\n MAX LV 0\n Cur LV 2\n Open LV 2\n Max PV 0\n Cur PV 1\n Act PV 1\n VG Size 7.51 GiB\n PE Size 4.00 MiB\n Total PE 1922\n Alloc PE \/ Size 1922 \/ 7.51 GiB\n Free PE \/ Size 0 \/ 0\n VG UUID G3H7s2-0yfo-vU9W-5g9g-fq9K-tpNO-U2Y7BQ\n<\/pre>\n
\n[root@centos63 ~]# lvcreate --name centos63_vol -l 100%FREE vg_data\n Logical volume \"centos63_vol\" created\n<\/pre>\n
\n[root@centos63 ~]# lvdisplay\n --- Logical volume ---\n LV Path \/dev\/vg_data\/centos63_vol\n LV Name centos63_vol\n VG Name vg_data\n LV UUID bVRJwM-5CuR-mLf4-tqHV-j5e4-cs3o-ffKL41\n LV Write Access read\/write\n LV Creation host, time centos63.ehowstuff.local, 2012-09-28 22:55:13 +0800\n LV Status available\n # open 0\n LV Size 4.99 GiB\n Current LE 1278\n Segments 1\n Allocation inherit\n Read ahead sectors auto\n - currently set to 256\n Block device 253:2\n\n --- Logical volume ---\n LV Path \/dev\/vg_centos63\/lv_root\n LV Name lv_root\n VG Name vg_centos63\n LV UUID 3Se9Zl-RmAu-f707-1Fv2-wMvX-oH3z-maExU0\n LV Write Access read\/write\n LV Creation host, time centos63.ehowstuff.local, 2012-07-15 20:17:31 +0800\n LV Status available\n # open 1\n LV Size 5.54 GiB\n Current LE 1418\n Segments 1\n Allocation inherit\n Read ahead sectors auto\n - currently set to 256\n Block device 253:0\n\n --- Logical volume ---\n LV Path \/dev\/vg_centos63\/lv_swap\n LV Name lv_swap\n VG Name vg_centos63\n LV UUID KijzOf-uPjy-JbJd-dcjw-u0XO-aqPA-2GKScq\n LV Write Access read\/write\n LV Creation host, time centos63.ehowstuff.local, 2012-07-15 20:17:33 +0800\n LV Status available\n # open 1\n LV Size 1.97 GiB\n Current LE 504\n Segments 1\n Allocation inherit\n Read ahead sectors auto\n - currently set to 256\n Block device 253:1\n<\/pre>\n
\n[root@centos63 ~]# mke2fs -j \/dev\/vg_data\/centos63_vol\n<\/pre>\n
\n[root@centos63 ~]# mke2fs -j \/dev\/vg_data\/centos63_vol\nmke2fs 1.41.12 (17-May-2010)\nFilesystem label=\nOS type: Linux\nBlock size=4096 (log=2)\nFragment size=4096 (log=2)\nStride=0 blocks, Stripe width=0 blocks\n327680 inodes, 1308672 blocks\n65433 blocks (5.00%) reserved for the super user\nFirst data block=0\nMaximum filesystem blocks=1342177280\n40 block groups\n32768 blocks per group, 32768 fragments per group\n8192 inodes per group\nSuperblock backups stored on blocks:\n 32768, 98304, 163840, 229376, 294912, 819200, 884736\n\nWriting inode tables: done\nCreating journal (32768 blocks): done\nWriting superblocks and filesystem accounting information: done\n\nThis filesystem will be automatically checked every 37 mounts or\n180 days, whichever comes first. Use tune2fs -c or -i to override.\n<\/pre>\n
\n[root@centos63 ~]# mkdir \/mydata\n<\/pre>\n
\n[root@centos63 ~]# e2label \/dev\/vg_data\/centos63_vol \/mydata\n<\/pre>\n
\n[root@centos63 ~]# vi \/etc\/fstab\n<\/pre>\n
\n\/dev\/vg_data\/centos63_vol \/mydata ext4 defaults 1 1\n<\/pre>\n
\n#\n# \/etc\/fstab\n# Created by anaconda on Sun Jul 15 20:17:38 2012\n#\n# Accessible filesystems, by reference, are maintained under '\/dev\/disk'\n# See man pages fstab(5), findfs(8), mount(8) and\/or blkid(8) for more info\n#\n\/dev\/mapper\/vg_centos63-lv_root \/ ext4 defaults 1 1\nUUID=2217c7b1-4467-4c81-8596-c3ee7758e2cc \/boot ext4 defaults 1 2\n\/dev\/mapper\/vg_centos63-lv_swap swap swap defaults 0 0\ntmpfs \/dev\/shm tmpfs defaults 0 0\ndevpts \/dev\/pts devpts gid=5,mode=620 0 0\nsysfs \/sys sysfs defaults 0 0\nproc \/proc proc defaults 0 0\n\/dev\/vg_data\/centos63_vol \/mydata ext4 defaults 1 1\n<\/pre>\n
\n[root@centos63 ~]# mount \/mydata\n<\/pre>\n
\n[root@centos63 ~]# df -lh\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/mapper\/vg_centos63-lv_root\n 5.5G 2.0G 3.3G 39% \/\ntmpfs 504M 0 504M 0% \/dev\/shm\n\/dev\/sda1 485M 65M 395M 15% \/boot\n\/dev\/mapper\/vg_data-centos63_vol\n 5.0G 139M 4.6G 3% \/mydata\n<\/pre>\n","protected":false},"excerpt":{"rendered":"