In this post, i will share on how to setup additional LVM in CentOS 5.5.<\/p>\n
1. Assumed that new hard disk 2 (sdb) has been added in this CentOS 5.5 server.
\n2. Print the current partition table of the hard disk :<\/p>\n
\n[root@server ~]# fdisk -lu\n\nDisk \/dev\/sda: 21.4 GB, 21474836480 bytes\n255 heads, 63 sectors\/track, 2610 cylinders, total 41943040 sectors\nUnits = sectors of 1 * 512 = 512 bytes\n\n Device Boot Start End Blocks Id System\n\/dev\/sda1 * 63 208844 104391 83 Linux\n\/dev\/sda2 208845 2313359 1052257+ 82 Linux swap \/ Solaris\n\/dev\/sda3 2313360 14667344 6176992+ 8e Linux LVM\n\/dev\/sda4 14667345 41929649 13631152+ 8e Linux LVM\n\nDisk \/dev\/sdb: 21.4 GB, 21474836480 bytes\n255 heads, 63 sectors\/track, 2610 cylinders, total 41943040 sectors\nUnits = sectors of 1 * 512 = 512 bytes\n\nDisk \/dev\/sdb doesn't contain a valid partition table\n<\/pre>\n<\/ol>\n3. Create new partition for \/dev\/sdb using below command.<\/p>\n
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\n[root@server ~]# fdisk \/dev\/sdb\nDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel\nBuilding a new DOS disklabel. Changes will remain in memory only,\nuntil you decide to write them. After that, of course, the previous\ncontent won't be recoverable.\n\n\nThe number of cylinders for this disk is set to 2610.\nThere is nothing wrong with that, but this is larger than 1024,\nand could in certain setups cause problems with:\n1) software that runs at boot time (e.g., old versions of LILO)\n2) booting and partitioning software from other OSs\n (e.g., DOS FDISK, OS\/2 FDISK)\nWarning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)\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 (1-2610, default 1):\nUsing default value 1\nLast cylinder or +size or +sizeM or +sizeK (1-2610, default 2610):\nUsing default value 2610\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: 21.4 GB, 21474836480 bytes\n255 heads, 63 sectors\/track, 2610 cylinders\nUnits = cylinders of 16065 * 512 = 8225280 bytes\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 1 2610 20964793+ 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<\/pre>\n<\/ol>\n\n
\n[root@server ~]# mke2fs -j \/dev\/sdb1\nmke2fs 1.39 (29-May-2006)\nFilesystem label=\nOS type: Linux\nBlock size=4096 (log=2)\nFragment size=4096 (log=2)\n2621440 inodes, 5241198 blocks\n262059 blocks (5.00%) reserved for the super user\nFirst data block=0\nMaximum filesystem blocks=0\n160 block groups\n32768 blocks per group, 32768 fragments per group\n16384 inodes per group\nSuperblock backups stored on blocks:\n 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\n 4096000\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 24 mounts or\n180 days, whichever comes first. Use tune2fs -c or -i to override.\n<\/pre>\n<\/ol>\n4. Next create the new partitions for this LVM.<\/p>\n
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\n[root@server ~]# pvcreate \/dev\/sdb1\n Physical volume \"\/dev\/sdb1\" successfully created\n<\/pre>\n<\/ol>\n5. Display the Physical Volume using command below:<\/p>\n
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\n[root@server ~]# pvdisplay\n --- Physical volume ---\n PV Name \/dev\/sda4\n VG Name VolGroup00\n PV Size 13.00 GB \/ not usable 3.67 MB\n Allocatable yes (but full)\n PE Size (KByte) 4096\n Total PE 3327\n Free PE 0\n Allocated PE 3327\n PV UUID JgYuxF-UJiB-t148-g5WQ-Lx05-Ozk1-13UwAR\n\n \"\/dev\/sdb1\" is a new physical volume of \"19.99 GB\"\n --- NEW Physical volume ---\n PV Name \/dev\/sdb1\n VG Name\n PV Size 19.99 GB\n Allocatable NO\n PE Size (KByte) 0\n Total PE 0\n Free PE 0\n Allocated PE 0\n PV UUID 246F8V-FMTR-WNK0-9305-q2sf-PKtC-VQXOQr\n<\/pre>\n<\/ol>\n6. Create new volume group for \/dev\/sdb1. Assumed that previous volume goup is VolGroup00. So next volume group will be VolGroup01.<\/p>\n
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\n[root@server ~]# vgcreate VolGroup01 \/dev\/sdb1\n Volume group \"VolGroup01\" successfully created\n<\/pre>\n<\/ol>\n7. Display the existing Volume Group.<\/p>\n
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\n[root@server ~]# vgdisplay\n --- Volume group ---\n VG Name VolGroup01\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 19.99 GB\n PE Size 4.00 MB\n Total PE 5118\n Alloc PE \/ Size 0 \/ 0\n Free PE \/ Size 5118 \/ 19.99 GB\n VG UUID tvLVhu-6Nzo-jB0b-oZQ4-VY30-9TP4-Dhxvvm\n\n --- Volume group ---\n VG Name VolGroup00\n System ID\n Format lvm2\n Metadata Areas 1\n Metadata Sequence No 2\n VG Access read\/write\n VG Status resizable\n MAX LV 0\n Cur LV 1\n Open LV 1\n Max PV 0\n Cur PV 1\n Act PV 1\n VG Size 13.00 GB\n PE Size 4.00 MB\n Total PE 3327\n Alloc PE \/ Size 3327 \/ 13.00 GB\n Free PE \/ Size 0 \/ 0\n VG UUID 3XozzT-3A3w-6eXs-XoEb-yRN1-v9FM-N0YheL\n<\/pre>\n<\/ol>\n8. Create logical volumes with the name of optvol into VolGroup01 volume group.<\/p>\n
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\n[root@server ~]# lvcreate --name optvol -l 100%FREE VolGroup01\n Logical volume \"optvol\" created\n<\/pre>\n<\/ol>\n9. Display the logical volumes.<\/p>\n
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\n[root@server ~]# lvdisplay\n --- Logical volume ---\n LV Name \/dev\/VolGroup01\/optvol\n VG Name VolGroup01\n LV UUID YXkMnR-l7gH-tj0r-dCUt-Ncl7-aTmb-Vas4Tp\n LV Write Access read\/write\n LV Status available\n # open 0\n LV Size 19.99 GB\n Current LE 5118\n Segments 1\n Allocation inherit\n Read ahead sectors auto\n - currently set to 256\n Block device 253:1\n\n --- Logical volume ---\n LV Name \/dev\/VolGroup00\/datavol\n VG Name VolGroup00\n LV UUID KowzAO-WWMj-O0xw-IY31-Gfqv-sjaE-nYvdhk\n LV Write Access read\/write\n LV Status available\n # open 1\n LV Size 13.00 GB\n Current LE 3327\n Segments 1\n Allocation inherit\n Read ahead sectors auto\n - currently set to 256\n Block device 253:0\n<\/pre>\n<\/ol>\n10. creating a file with the mke2fs command<\/p>\n
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\n[root@server ~]# mke2fs -j \/dev\/VolGroup01\/optvol\nmke2fs 1.39 (29-May-2006)\nFilesystem label=\nOS type: Linux\nBlock size=4096 (log=2)\nFragment size=4096 (log=2)\n2621440 inodes, 5240832 blocks\n262041 blocks (5.00%) reserved for the super user\nFirst data block=0\nMaximum filesystem blocks=0\n160 block groups\n32768 blocks per group, 32768 fragments per group\n16384 inodes per group\nSuperblock backups stored on blocks:\n 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,\n 4096000\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 38 mounts or\n180 days, whichever comes first. Use tune2fs -c or -i to override.\n<\/pre>\n<\/ol>\n\n
\n[root@server ~]# e2label \/dev\/VolGroup01\/optvol \/opt\n<\/pre>\n<\/ol>\n\n
\n[root@server ~]# vi \/etc\/fstab\n<\/pre>\n<\/ol>\n\n
\n[root@server ~]# mount \/opt\n<\/pre>\n<\/ol>\n\n
\n[root@server ~]# df -lh\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/sda3 5.8G 4.3G 1.2G 79% \/\n\/dev\/sda1 99M 12M 83M 13% \/boot\ntmpfs 506M 0 506M 0% \/dev\/shm\n\/dev\/mapper\/VolGroup00-datavol\n 13G 855M 12G 7% \/data\n\/dev\/mapper\/VolGroup01-optvol\n 20G 173M 19G 1% \/opt\n<\/pre>\n<\/ol>\n\n
\n[root@server ~]# fdisk -lu\n\nDisk \/dev\/sda: 21.4 GB, 21474836480 bytes\n255 heads, 63 sectors\/track, 2610 cylinders, total 41943040 sectors\nUnits = sectors of 1 * 512 = 512 bytes\n\n Device Boot Start End Blocks Id System\n\/dev\/sda1 * 63 208844 104391 83 Linux\n\/dev\/sda2 208845 2313359 1052257+ 82 Linux swap \/ Solaris\n\/dev\/sda3 2313360 14667344 6176992+ 8e Linux LVM\n\/dev\/sda4 14667345 41929649 13631152+ 8e Linux LVM\n\nDisk \/dev\/sdb: 21.4 GB, 21474836480 bytes\n255 heads, 63 sectors\/track, 2610 cylinders, total 41943040 sectors\nUnits = sectors of 1 * 512 = 512 bytes\n\n Device Boot Start End Blocks Id System\n\/dev\/sdb1 63 41929649 20964793+ 8e Linux LVM\n<\/pre>\n<\/ol>\nReferences:<\/p>\n
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\nhttps:\/\/wiki.archlinux.org\/index.php\/LVM\nhttp:\/\/vr.org\/docs\/centos\/5\/html\/Cluster_Logical_Volume_Manager\/LV_create.html\nhttp:\/\/serverfault.com\/questions\/41904\/volume-group-out-of-space-how-do-i-reclaim-it\nhttp:\/\/www.idevelopment.info\/data\/Unix\/Linux\/LINUX_ManagingPhysicalLogicalVolumes.shtml\nhttp:\/\/en.gentoo-wiki.com\/wiki\/Root_filesystem_over_LVM2,_DM-Crypt_and_RAID\nhttp:\/\/wingloon.com\/2009\/01\/16\/setup-additional-lvm-in-centos-52\/\nhttp:\/\/rute.2038bug.com\/node22.html.gz\n<\/pre>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"In this post, i will share on how to setup additional LVM in CentOS 5.5. 1. Assumed that new hard disk 2 (sdb) has been added in this CentOS 5.5…<\/p>\n","protected":false},"author":6,"featured_media":349,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[1002],"tags":[1246,1536,1554,1556],"class_list":["post-1448","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lvm","tag-centos-5-5","tag-linux","tag-logical-volume","tag-lvm"],"_links":{"self":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/1448","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=1448"}],"version-history":[{"count":0,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/posts\/1448\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media\/349"}],"wp:attachment":[{"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/media?parent=1448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/categories?post=1448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostinggeeks.com\/howto\/wp-json\/wp\/v2\/tags?post=1448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}