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Friday, July 12, 2013

HowTo: OEL/RHEL 5.7 Create New VolGroup and LVol for new disk

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If you need to add an additional mount point onto a RHEL or OEL Linux server, here's how to do it using the logical volume manager for maximum flexibility:

We assume that you've added a new physical disk and that it's called /dev/sdb.

First check size of the device to ensure you've got the correct one:

# fdisk -l /dev/sdb

Now create a new primary partition on the disk:

# fdisk /dev/sdb
n        (new partition)
p        (primary partition)
1        (partition number)
<return> for 1st block
<return> for last block
w       (write config)
q       (quit)
Check you can see the new partition:

# ls -la /dev/sdb*

(You should see /dev/sdb1)

Now ensure that you create a new physical volume that the volume manager can see:

# pvcreate /dev/sdb1

Physical volume "/dev/sdb1" successfully created

Create a new Volume Group containing the new physcial partition:

# vgcreate VolGroup01 /dev/sdb1

Volume group "VolGroup01" successfully created

Create a new logical volume inside the volume group:

# lvcreate -L 480GB -n LogVol01 VolGroup01

Logical volume "LogVol01" created

Format the new logical volume using EXT3 (you can choose which version of EXT you want):

# mkfs -t ext3 /dev/VolGroup01/LogVol02

Now you just need to mount the partition up.

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