Lets say we have a volume group called vg_hostname, in that volume group there are 3 logical volumes:<\/p>\n
lv_home is mounted as \/home, is 60GB and, is full. We need to add more space to it but what if the volume group is full?<\/p>\n Luckily LVM allows us to add another physical volume to the volume group to get the space we need. So lets add a new 80GB disk, lets assume that this is \/dev\/vdb<\/p>\n First, we need to partition the device and set the partition as type LVM: Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)<\/p>\n WARNING: DOS-compatible mode is deprecated. It's strongly recommended to Command (m for help): p<\/p>\n Disk \/dev\/vdb: 85.9 GB, 85899345920 bytes Device Boot Start End Blocks Id System<\/p>\n Command (m for help): n Command (m for help): p<\/p>\n Disk \/dev\/vdb: 85.9 GB, 85899345920 bytes Device Boot Start End Blocks Id System Command (m for help): t 0 Empty 24 NEC DOS 81 Minix \/ old Lin bf Solaris Now we have a LVM partition as \/dev\/vdb1, next turn it into a usable physical volume:<\/p>\n Adding the new physical volume to our vg_hostname volume group is quite easy: Now we have an extra 80GB available in our volume group! Next we need to extend our vg_home logical volume to get that 80GB usable for that \"partition\" and since we want to use all available space we set the `-l +100%FREE1 flag\/value to expand the logical volume to all available free space:<\/p>\n Now our underlying device is 147.54GiB but our file system (ext4) is still the original 60GB, using resize2fs we can extend that ext4 filesystem to consume the new space:<\/p>\n And now, we've added 80GB to our \/home mount without taking the system or mount point offline.<\/p>\n","protected":false},"excerpt":{"rendered":" Lets say we have a volume group called vg_hostname, in that volume group there are 3 logical volumes: [root@hostname ~]# lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert lv_home vg_hostname -wi-ao– 60.00g lv_root vg_hostname -wi-ao– 50.00g … Continue reading [root@hostname ~]# lvs
\n LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
\n lv_home vg_hostname -wi-ao-- 60.00g
\n lv_root vg_hostname -wi-ao-- 50.00g
\n lv_swap vg_hostname -wi-ao-- 1.97g <\/code><\/p>\n[root@hostname ~]# vgs
\n VG #PV #LV #SN Attr VSize VFree
\n vg_mail2 2 3 0 wz--n- 120.00g 0 <\/code><\/p>\n
\n[root@hostname ~]# fdisk \/dev\/vdb
\nDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
\nBuilding a new DOS disklabel with disk identifier 0x496ca2c7.
\nChanges will remain in memory only, until you decide to write them.
\nAfter that, of course, the previous content won't be recoverable.<\/p>\n
\n switch off the mode (command 'c') and change display units to
\n sectors (command 'u').<\/p>\n
\n16 heads, 63 sectors\/track, 166440 cylinders
\nUnits = cylinders of 1008 * 512 = 516096 bytes
\nSector size (logical\/physical): 512 bytes \/ 512 bytes
\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes
\nDisk identifier: 0x496ca2c7<\/p>\n
\nCommand action
\n e extended
\n p primary partition (1-4)
\np
\nPartition number (1-4): 1
\nFirst cylinder (1-166440, default 1):
\nUsing default value 1
\nLast cylinder, +cylinders or +size{K,M,G} (1-166440, default 166440):
\nUsing default value 166440<\/p>\n
\n16 heads, 63 sectors\/track, 166440 cylinders
\nUnits = cylinders of 1008 * 512 = 516096 bytes
\nSector size (logical\/physical): 512 bytes \/ 512 bytes
\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes
\nDisk identifier: 0x496ca2c7<\/p>\n
\n\/dev\/vdb1 1 166440 83885728+ 83 Linux<\/p>\n
\nSelected partition 1
\nHex code (type L to list codes): L<\/p>\n
\n 1 FAT12 39 Plan 9 82 Linux swap \/ So c1 DRDOS\/sec (FAT-
\n 2 XENIX root 3c PartitionMagic 83 Linux c4 DRDOS\/sec (FAT-
\n 3 XENIX usr 40 Venix 80286 84 OS\/2 hidden C: c6 DRDOS\/sec (FAT-
\n 4 FAT16 <32M 41 PPC PReP Boot 85 Linux extended c7 Syrinx \n 5 Extended 42 SFS 86 NTFS volume set da Non-FS data \n 6 FAT16 4d QNX4.x 87 NTFS volume set db CP\/M \/ CTOS \/ .\n 7 HPFS\/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility \n 8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt \n 9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access \n a OS\/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R\/O \n b W95 FAT32 52 CP\/M 9f BSD\/OS e4 SpeedStor \n c W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs \n e W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT \n f W95 Ext'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12\/16\/\n10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux\/PA-RISC b\n11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor \n12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor \n14 Hidden FAT16 <3 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary \n16 Hidden FAT16 64 Novell Netware af HFS \/ HFS+ fb VMware VMFS \n17 Hidden HPFS\/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE \n18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto\n1b Hidden W95 FAT3 75 PC\/IX bb Boot Wizard hid fe LANstep \n1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT \n1e Hidden W95 FAT1\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\/vdb: 85.9 GB, 85899345920 bytes\n16 heads, 63 sectors\/track, 166440 cylinders\nUnits = cylinders of 1008 * 512 = 516096 bytes\nSector size (logical\/physical): 512 bytes \/ 512 bytes\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\nDisk identifier: 0x496ca2c7\n\n Device Boot Start End Blocks Id System\n\/dev\/vdb1 1 166440 83885728+ 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.<\/code><\/p>\n[root@hostname ~]# pvcreate \/dev\/vdb1
\n Writing physical volume data to disk \"\/dev\/vdb1\"
\n Physical volume \"\/dev\/vdb1\" successfully created<\/code><\/p>\n
\n[root@hostname ~]# vgextend vg_mail2 \/dev\/vdb1
\n<\/code><\/p>\n
\n[root@hostname ~]# vgs
\n VG #PV #LV #SN Attr VSize VFree
\n vg_mail2 2 3 0 wz--n- 199.50g 80.00g<\/code><\/p>\n[root@hostname ~]# lvextend -l +100%FREE \/dev\/vg_hostname\/lv_home
\n Extending logical volume lv_home to 147.54 GiB
\n Logical volume lv_home successfully resized<\/code><\/p>\n[root@hostname ~]# resize2fs \/dev\/vg_hostname\/lv_home
\nresize2fs 1.41.12 (17-May-2010)
\nResizing the filesystem on \/dev\/vg_hostname\/lv_home to 38675456 (4k) blocks.
\nThe filesystem on \/dev\/vg_hostname\/lv_home is now 38675456 blocks long.<\/code><\/p>\n