AIX logical volume manager (LVM) is a widely used tool for logical volume management which includes allocating disks and resizing logical volumes.
Using logical volume manager, a hard disk or set of hard disk is allocated to one or more physical volumes. Logical volume manage (LVM) allows users to create partitions from more than one disk and allows them to extend the filesystem size online within few seconds.
In below text, you can find how to add a new drive in AIX operating system using LVM.
Step by step method to add a new disk on LVM:
➤ Initially we need to add the new physical or virtual disk to the logical partition. After successfully adding virtual disk you need to re scan your server hardware so we can get the new disk information.
For scanning please run the below command on AIX server terminal.
ibm_aix:/> cfgmgr
The command output show you the available new disk which are connected to this AIX machine.
➤ Let’s assume that the new disk is hdisk01,please run the below command to check the disk.
ibm_aix:/> lsdev -Cc disk
hdisk00 Available Virtual SCSI Disk Drive
hdisk01 Available Virtual SCSI Disk Drive
In above output two disk is available hdisk00 & hdisk01.
➤ You need to create a new group and move the new disk hdisk01 in there. Let's assume the new group named is "rootvg". So please find the below command to create a new group and add the disk in it.
ibm_aix:/> mkvg -y rootvg hdisk01
in this step we add "hdisk01" into "rootvg".
➤ "lspv" command is used for getting an information about the new disk "hdisk01". Please find the "lspv" command output as given below.
ibm_aix:/> lspv hdisk01
PHYSICAL VOLUME: hdisk01 VOLUME GROUP: rootvg
PV IDENTIFIER: 00f68f03d1e42951 VG IDENTIFIER 00f68f0300004c0000000153d1e429c1
PV STATE: active
STALE PARTITIONS: 0 ALLOCATABLE: yes
PP SIZE: 128 megabyte(s) LOGICAL VOLUMES: 17
TOTAL PPs: 799 (102272 megabytes) VG DESCRIPTORS: 2
FREE PPs: 118 (15104 megabytes) HOT SPARE: no
USED PPs: 681 (87168 megabytes) MAX REQUEST: 256 kilobytes
FREE DISTRIBUTION: 11..00..00..00..107
USED DISTRIBUTION: 149..160..159..160..53
MIRROR POOL: None
If you look the above output you can see the all information regarding the new disk in details.
➤ In this step, you need to create a log logical volume for jfs2 file system and this needs to be part of volume group "rootvg".
ibm_aix:/> mklv -t jfs2log rootvg 1
➤ Please check the new logical volume (lv) and used the "lsvg" command to check the new logical volume present on the AIX server.
ibm_aix:/> lsvg
rootvg
The command shown you he existing logical group on the server.
ibm_aix:/> lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 1 1 closed/syncd N/A
hd6 paging 404 404 1 open/syncd N/A
loglv00 jfs2log 1 1 1 open/syncd N/A
hd4 jfs2 4 4 1 open/syncd /
In above output, you can see "rootvg" is volume group present and in rootvg, you can find the logical volume "loglv00".Now we create a logical volume and fixed their size , lets assume we will used 20GB size and used the logical volume name lv_aix.
ibm_aix:/> lsvg rootvg
ibm_aix:/> mklv -t jfs2 -y lv_aix rootvg 30G
ibm_aix:/> mkfs -o log=/dev/loglv00 -V jfs2 /dev/lv_aix
➤ After successfully create filesystem, we will mount the filesystem to a particular folder.
ibm_aix:/> mkdir /aix
ibm_aix:/> mount -o log=/dev/loglv00 /dev/lv_aix /aix
So, nwly "/aix" filesystem has been created, for permanent it, please make an entry in "/etc/filesystems file. So when you will take a reboot of machine the filesystem not umount.
Please comment on the post, if you have any query regarding this topic.
Using logical volume manager, a hard disk or set of hard disk is allocated to one or more physical volumes. Logical volume manage (LVM) allows users to create partitions from more than one disk and allows them to extend the filesystem size online within few seconds.
In below text, you can find how to add a new drive in AIX operating system using LVM.
Step by step method to add a new disk on LVM:
➤ Initially we need to add the new physical or virtual disk to the logical partition. After successfully adding virtual disk you need to re scan your server hardware so we can get the new disk information.
For scanning please run the below command on AIX server terminal.
ibm_aix:/> cfgmgr
The command output show you the available new disk which are connected to this AIX machine.
➤ Let’s assume that the new disk is hdisk01,please run the below command to check the disk.
ibm_aix:/> lsdev -Cc disk
hdisk00 Available Virtual SCSI Disk Drive
hdisk01 Available Virtual SCSI Disk Drive
In above output two disk is available hdisk00 & hdisk01.
➤ You need to create a new group and move the new disk hdisk01 in there. Let's assume the new group named is "rootvg". So please find the below command to create a new group and add the disk in it.
ibm_aix:/> mkvg -y rootvg hdisk01
in this step we add "hdisk01" into "rootvg".
➤ "lspv" command is used for getting an information about the new disk "hdisk01". Please find the "lspv" command output as given below.
ibm_aix:/> lspv hdisk01
PHYSICAL VOLUME: hdisk01 VOLUME GROUP: rootvg
PV IDENTIFIER: 00f68f03d1e42951 VG IDENTIFIER 00f68f0300004c0000000153d1e429c1
PV STATE: active
STALE PARTITIONS: 0 ALLOCATABLE: yes
PP SIZE: 128 megabyte(s) LOGICAL VOLUMES: 17
TOTAL PPs: 799 (102272 megabytes) VG DESCRIPTORS: 2
FREE PPs: 118 (15104 megabytes) HOT SPARE: no
USED PPs: 681 (87168 megabytes) MAX REQUEST: 256 kilobytes
FREE DISTRIBUTION: 11..00..00..00..107
USED DISTRIBUTION: 149..160..159..160..53
MIRROR POOL: None
If you look the above output you can see the all information regarding the new disk in details.
➤ In this step, you need to create a log logical volume for jfs2 file system and this needs to be part of volume group "rootvg".
ibm_aix:/> mklv -t jfs2log rootvg 1
➤ Please check the new logical volume (lv) and used the "lsvg" command to check the new logical volume present on the AIX server.
ibm_aix:/> lsvg
rootvg
The command shown you he existing logical group on the server.
ibm_aix:/> lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 1 1 closed/syncd N/A
hd6 paging 404 404 1 open/syncd N/A
loglv00 jfs2log 1 1 1 open/syncd N/A
hd4 jfs2 4 4 1 open/syncd /
In above output, you can see "rootvg" is volume group present and in rootvg, you can find the logical volume "loglv00".Now we create a logical volume and fixed their size , lets assume we will used 20GB size and used the logical volume name lv_aix.
ibm_aix:/> lsvg rootvg
ibm_aix:/> mklv -t jfs2 -y lv_aix rootvg 30G
ibm_aix:/> mkfs -o log=/dev/loglv00 -V jfs2 /dev/lv_aix
➤ After successfully create filesystem, we will mount the filesystem to a particular folder.
ibm_aix:/> mkdir /aix
ibm_aix:/> mount -o log=/dev/loglv00 /dev/lv_aix /aix
So, nwly "/aix" filesystem has been created, for permanent it, please make an entry in "/etc/filesystems file. So when you will take a reboot of machine the filesystem not umount.
Please comment on the post, if you have any query regarding this topic.
