Attempting to increase the size of a Linux LVM Disk

RamblingBiped

Growing Logical Volumes: https://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/lv_extend.html

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Logical_Volume_Manager_Administration/lv_extend.html

travisdh1

Let's see if I can remember this without looking anything up this time...

pvcreate /dev/new_drive
vgextend vg_name /dev/new_drive
lvextend lv_name -l 100%FREE

Dang, I forget the ones to extend the file system

wirestyle22

@travisdh1 My problem is LVS and VGS displays the right amout of space.PVS displays two PV's in the same VG, both at 1.95TB but nothing is listed as VFree.

vgs

lvs

pvs

df -h

scottalanmiller

Have you expanded the filesystem yet?

wirestyle22

@scottalanmiller

resize2fs /dev/mapper/centos-root

[root@localhost ~]# resize2fs /dev/mapper/centos-root 3.91T
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.

scottalanmiller

That's not good. Try it with the -p flag.

scottalanmiller

What filesystem do you have? Could it be XFS?

scottalanmiller

If XFS the command syntax is...

xfs_growfs /mount/point -D size

scottalanmiller

It's XenServer, we are expecting EXT4 here, right?

wirestyle22

@scottalanmiller Correct

wirestyle22

Is this improper syntax?

stacksofplates

@wirestyle22 said in Attempting to increase the size of a Linux LVM Disk:

Is this improper syntax?

Try +3.91.

Also, why not have the data on its own volume? It's more flexible that way.

stacksofplates

If the +doesn't work you will have to add it to the existing size. So if its 5TB it would be 8.91

scottalanmiller

Just appears that the size is too small.

wirestyle22

@scottalanmiller That confuses me because each is 1.9T

scottalanmiller

@wirestyle22 said in Attempting to increase the size of a Linux LVM Disk:

@scottalanmiller That confuses me because each is 1.9T

Why? Your total from your LVS command looks like 3.89TB but you are trying to expand to 3.91TB.

wirestyle22

@scottalanmiller LVS is 3.89T

scottalanmiller

I edited while you were typing. I read the wrong field. But it is still too small. The FS must be smaller than the container holding it.

wirestyle22

@scottalanmiller said in Attempting to increase the size of a Linux LVM Disk:

I edited while you were typing. I read the wrong field. But it is still too small. The FS must be smaller than the container holding it.

How much smaller? even 3.86 kicks back the same error

scottalanmiller

@wirestyle22 said in Attempting to increase the size of a Linux LVM Disk:

@scottalanmiller said in Attempting to increase the size of a Linux LVM Disk:

I edited while you were typing. I read the wrong field. But it is still too small. The FS must be smaller than the container holding it.

How much smaller? even 3.86 kicks back the same error

Try something like 3.4TB. Remember FS overhead.