HOW TO MERGE TWO VG(VOLUME GROUP) INTO ONE

In this article we are going to learn how to merge two volume group into one .

two volume group into one

Follow these steps:

  • Create four partitions .
[root@localhost ~]# fdisk /dev/sda
The number of cylinders for this disk is set to 6147.
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)
Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l
First cylinder (5482-6147, default 5482):
Using default value 5482
Last cylinder or +size or +sizeM or +sizeK (5482-6147, default 6147): +500M

Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l
First cylinder (5544-6147, default 5544):
Using default value 5544
Last cylinder or +size or +sizeM or +sizeK (5544-6147, default 6147): +500M

Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l
First cylinder (5606-6147, default 5606):
Using default value 5606
Last cylinder or +size or +sizeM or +sizeK (5606-6147, default 6147): +500M

Command (m for help): n
Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l
First cylinder (5668-6147, default 5668):
Using default value 5668
Last cylinder or +size or +sizeM or +sizeK (5668-6147, default 6147): +500M

Command (m for help): p
Disk /dev/sda: 50.5 GB, 50562793472 bytes
255 heads, 63 sectors/track, 6147 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        5099    40957686   83  Linux
/dev/sda2            5100        5481     3068415   82  Linux swap / Solaris
/dev/sda4            5482        6147     5349645    5  Extended
/dev/sda5            5482        5543      497983+  83  Linux
/dev/sda6            5544        5605      497983+  83  Linux
/dev/sda7            5606        5667      497983+  83  Linux
/dev/sda8            5668        5729      497983+  83  Linux

Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

[root@localhost ~]# partprobe /dev/sda


  • Lets create physical volume including sda5 and sda6 for vg00
[root@localhost ~]# pvcreate /dev/sda5 /dev/sda6
  Physical volume "/dev/sda5" successfully created
  Physical volume "/dev/sda6" successfully created
  • Now create volume group vg00 including sda5 and sda6
[root@localhost ~]# vgcreate vgoo /dev/sda5 /dev/sda6
  Volume group "vgoo" successfully created
  • Convert partition sda7 and sda8 into physical volume.
[root@localhost ~]# pvcreate /dev/sda7 /dev/sda8
  Physical volume "/dev/sda5" successfully created
  Physical volume "/dev/sda6" successfully created
  • Create volume group vg11 including sda7 and sda8
[root@localhost ~]# vgcreate vg11 /dev/sda7 /dev/sda8
  Volume group "vg11" successfully created
  • Now we are going to merge both and make it one .
[root@localhost ~]# vgmerge -v vgoo vg11
    Checking for volume group "vgoo"
    Checking for volume group "vg11"
    Archiving volume group "vg11" metadata (seqno 1).
    Archiving volume group "vgoo" metadata (seqno 1).
    Writing out updated volume group
    Creating volume group backup "/etc/lvm/backup/vgoo" (seqno 2).
  Volume group "vg11" successfully merged into "vgoo"

In our command  vgmerge   -v   vg00   vg11  ,  i merge vg11 into vg00 . So i wrote vg00 first in this command .

HOW TO OPEN AN .ISO FILE IN LINUX

HOW TO CONFIGURE RAID OVER LOOP DEVICES WITH SPARE DEVICE AND LVM OVER RAID

WHAT IS LOOP DEVICE AND HOW TO CONFIGURE

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s