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Old 04-06-2015, 07:57 AM   #1
manmohan
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help me how to extend lvm


i want to know how to extend lvm partition
 
Old 04-06-2015, 08:19 AM   #2
T3RM1NVT0R
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Welcome to LQ!!!

As you are new to the community it will be good if you have a look at community rules here

What did you try so far? Did you go through any of the online documentation / how to. We are here to help but you have to let us know where you are stuck.

Here are the links which you should go though:

1. http://tldp.org/HOWTO/LVM-HOWTO/extendlv.html

2. http://www.linuxuser.co.uk/features/...e-fly-with-lvm

3. http://www.tecmint.com/extend-and-reduce-lvms-in-linux/
 
Old 04-06-2015, 08:45 AM   #3
agentbuzz
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How-to: step by step procedure to increase logical volume.

HOW-TO: USE LINUX LVM TOOLS TO ADD DISK SPACE TO A VOLUME AFTER ADDING A VIRTUAL DISK.


After adding a virtual disk, you have to re-scan the SCSI bus on the Linux system to get it to give the new disk a device node:

Code:
STAGE>ls -l /sys/class/scsi_host
STAGE>echo "- - -" > /sys/class/scsi_host/host0/scan
In this case, the device was /dev/sdf, so fdisk that.

Code:
STAGE> fdisk /dev/sdf
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.


The number of cylinders for this disk is set to 25847.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

type "n" for "new partition"

Command (m for help): n

Make it a Primary partition:

Command action
   e   extended
   p   primary partition (1-4)
p
Now, select partition 1 and take the defaults for first and last cylinder:

Code:
Partition number (1-4): 1
First cylinder (1-25847, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-25847, default 25847):
Using default value 25847

Select "t" to change the partition type:

Command (m for help): t
Selected partition 1
You can look at the codes for possible partition types with an "L". Since this is a Linux LVM partition, it is code "8e" hex.

Code:
Hex code (type L to list codes): L

 0  Empty           1e  Hidden W95 FAT1 80  Old Minix       bf  Solaris
 1  FAT12           24  NEC DOS         81  Minix / old Lin c1  DRDOS/sec (FAT-
 2  XENIX root      39  Plan 9          82  Linux swap / So c4  DRDOS/sec (FAT-
 3  XENIX usr       3c  PartitionMagic  83  Linux           c6  DRDOS/sec (FAT-
 4  FAT16 <32M      40  Venix 80286     84  OS/2 hidden C:  c7  Syrinx
 5  Extended        41  PPC PReP Boot   85  Linux extended  da  Non-FS data
 6  FAT16           42  SFS             86  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS       4d  QNX4.x          87  NTFS volume set de  Dell Utility
 8  AIX             4e  QNX4.x 2nd part 88  Linux plaintext df  BootIt
 9  AIX bootable    4f  QNX4.x 3rd part 8e  Linux LVM       e1  DOS access
 a  OS/2 Boot Manag 50  OnTrack DM      93  Amoeba          e3  DOS R/O
 b  W95 FAT32       51  OnTrack DM6 Aux 94  Amoeba BBT      e4  SpeedStor
 c  W95 FAT32 (LBA) 52  CP/M            9f  BSD/OS          eb  BeOS fs
 e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a0  IBM Thinkpad hi ee  EFI GPT
 f  W95 Ext'd (LBA) 54  OnTrackDM6      a5  FreeBSD         ef  EFI (FAT-12/16/
10  OPUS            55  EZ-Drive        a6  OpenBSD         f0  Linux/PA-RISC b
11  Hidden FAT12    56  Golden Bow      a7  NeXTSTEP        f1  SpeedStor
12  Compaq diagnost 5c  Priam Edisk     a8  Darwin UFS      f4  SpeedStor
14  Hidden FAT16 <3 61  SpeedStor       a9  NetBSD          f2  DOS secondary
16  Hidden FAT16    63  GNU HURD or Sys ab  Darwin boot     fb  VMware VMFS
17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE
18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fe  LANstep
1c  Hidden W95 FAT3 75  PC/IX           be  Solaris boot    ff  BBT
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)

Write the change to the partition table:

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
Check that /dev/sdf shows up as a Linux LVM partition:

Code:
STAGE> fdisk -l

Disk /dev/sda: 106 MB, 106037248 bytes
4 heads, 32 sectors/track, 1618 cylinders
Units = cylinders of 128 * 512 = 65536 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           2        1601      102400   83  Linux

Disk /dev/sdb: 34.3 GB, 34360918016 bytes
88 heads, 6 sectors/track, 127104 cylinders
Units = cylinders of 528 * 512 = 270336 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      127101    33554432   82  Linux swap / Solaris

Disk /dev/sdc: 75.1 GB, 75167301632 bytes
111 heads, 60 sectors/track, 22043 cylinders
Units = cylinders of 6660 * 512 = 3409920 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1       22044    73404416   8e  Linux LVM

Disk /dev/sdd: 858.9 GB, 858993459200 bytes
53 heads, 35 sectors/track, 904432 cylinders
Units = cylinders of 1855 * 512 = 949760 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      480697   445845504   8e  Linux LVM
/dev/sdd2          480697      904432   393015112   8e  Linux LVM

Disk /dev/sde: 1288.4 GB, 1288490188800 bytes
255 heads, 63 sectors/track, 156650 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      104434   838860799+  8e  Linux LVM
/dev/sde2          104434      156650   419430325   83  Linux

Disk /dev/sdf: 212.6 GB, 212600881152 bytes
255 heads, 63 sectors/track, 25847 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1               1       25847   207615996   8e  Linux LVM
STAGE>
Create the new partition as a Physical Volume in LVM terms:

Code:
STAGE> pvcreate /dev/sdf1
  Writing physical volume data to disk "/dev/sdf1"
  Physical volume "/dev/sdf1" successfully created
Display your Volume Groups so you can see the "before" and "after" states:

Code:
STAGE> vgdisplay
  --- Volume group ---
  VG Name               volumex
  System ID
  Format                lvm2
  Metadata Areas        4
  Metadata Sequence No  21
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                4
  Act PV                4
  VG Size               1.95 TB
  PE Size               4.00 MB
  Total PE              511996
  Alloc PE / Size       511996 / 1.95 TB
  Free  PE / Size       0 / 0
  VG UUID               AEkJMc-pJke-512C-2GPh-uynH-Jd3r-7P8ohM

  --- Volume group ---
  VG Name               VolGroup00
  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               70.00 GB
  PE Size               4.00 MB
  Total PE              17920
  Alloc PE / Size       17920 / 70.00 GB
  Free  PE / Size       0 / 0
  VG UUID               QiUgoN-KfHS-kLN4-ms5P-Xnzh-uCIt-tCtSFq
Extend the Volume Group to include the Physical Volume you just created:

Code:
STAGE> vgextend volumex /dev/sdf1
  Volume group "volumex" successfully extended
Do a pvscan and an lvdisplay to enumerate the free space withing /dev/sdf and to see the name of the Logical Volume:

Code:
STAGE> pvscan
  PV /dev/sdd1   VG volumex   lvm2 [425.19 GB / 0    free]
  PV /dev/sdd2   VG volumex   lvm2 [374.80 GB / 0    free]
  PV /dev/sde1   VG volumex   lvm2 [800.00 GB / 0    free]
  PV /dev/sde2   VG volumex   lvm2 [400.00 GB / 0    free]
  PV /dev/sdf1   VG volumex   lvm2 [198.00 GB / 198.00 GB free]
  PV /dev/sdc1   VG VolGroup00    lvm2 [70.00 GB / 0    free]
  Total: 6 [2.21 TB] / in use: 6 [2.21 TB] / in no VG: 0 [0   ]


STAGE> lvdisplay
  --- Logical volume ---
  LV Name                /dev/volumex/data-drive
  VG Name                volumex
  LV UUID                qfKl0W-5JAm-wjuG-XA7J-uO1c-5Y2g-ThWfdQ
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.95 TB
  Current LE             511996
  Segments               4
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                o4ZQdf-DK3z-mN0B-nwBG-2T8X-p4M3-YnIBL1
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                70.00 GB
  Current LE             17920
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
Extend the LV by using "lvextend", then the name of the LV, then the device you want to add to the LV:

Code:
STAGE> lvextend /dev/volumex/data-drive /dev/sdf1
  Extending logical volume data-drive to 2.15 TB
  Logical volume data-drive successfully resized
Observe that the VG has been enlarged:


Code:
STAGE> vgdisplay
  --- Volume group ---
  VG Name               volumex
  System ID
  Format                lvm2
  Metadata Areas        5
  Metadata Sequence No  23
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                5
  Act PV                5
  VG Size               2.15 TB
  PE Size               4.00 MB
  Total PE              562683
  Alloc PE / Size       562683 / 2.15 TB
  Free  PE / Size       0 / 0
  VG UUID               AEkJMc-pJke-512C-2GPh-uynH-Jd3r-7P8ohM

  --- Volume group ---
  VG Name               VolGroup00
  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               70.00 GB
  PE Size               4.00 MB
  Total PE              17920
  Alloc PE / Size       17920 / 70.00 GB
  Free  PE / Size       0 / 0
  VG UUID               QiUgoN-KfHS-kLN4-ms5P-Xnzh-uCIt-tCtSFq

STAGE>
In this case, I had to unmount the volume and resize it. I got an error telling me that I needed to fsck it, so I did that and used resize2fs again to resize the LV. The following three commands take care of it.


Code:
STAGE> umount /dev/volumex/data-drive
STAGE> resize2fs /dev/volumex/data-drive
STAGE> e2fsck -f /dev/volumex/data-drive
Finally, mount the filesystem and check it:

Code:
mount -a
ls -l /dataroot
df -h
 
  


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