I am running Oracle Linux Unbreakable 6.5 on Hyper-V , VHD size on Hyper-V is increased how I can extend from its one partition extend dev/sda2 which is mount on /

is there any safe way to extend this

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You can extend LVM by adding a new disk, then expanding the LV group across it.

Here are my notes from the last time I had to do it:

Extending LVM:
In VMWare create a new virtual hard disk device to add to the volume group.

In LVM, there are several layers, each builds on top of the other:
PV[s] (Physical Volumes) -> VG[s] (Volume Groups) -> LV[s] (Logical Volumes) -> Filesystems.

Gives you required information regarding the Logical Volume Group.

Gives you information regarding the Physical Volume Group.

1. example #1: you've added to VMWare a new virtual hard disk called /dev/sdb
After you've extended the Volume Group, you are free to extend the underlying Logical Volume:


Finally, you'll have to resize the filesystem within /dev/turnkey/root so it can see that the underlying block device just got 10G bigger:
resize2fs 1.41.11 (14-Mar-2010) Filesystem at /dev/turnkey/root is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 2 Performing an on-line resize of /dev/turnkey/root to 7077888 (4k) blocks. The filesystem on /dev/turnkey/root is now 7077888 blocks long.


The following section won't apply to you, I renamed the host (and LVM's) whilst I was at it. if you are also changing the Hostname of an LVM enabled machine, the following will apply:

PERFORM THE FOLLOWING BEFORE REBOOTING!
Please remember to check and amend any hostnames or names - lvdisplay and pvdisplay are your friends, make sure what you are entering matches you current setup - if in doubt, post here in response.

First, your system doesn't use LVM. The only way to replace your current setup with an LVM-based one is to reinstall it.

You need a partition manager to change the size of /dev/sda2. parted or its GUI version, gparted, should be able to accomplish this. It's dangerous - a small mistake and your data is hard or impossible to recover. If the data is important, first back it up.

If /dev/sda has room after partition 2, it's simply a question of changing its size. If not, the partition must be moved to a different place. gparted/parted can do that.

After that, the filesystem has to be extended as well, though parted may have an option to do both tasks together.

Since this is the root disk, the best bet is to boot from a Live DVD and do the work there.

It's a bit small and hard to read.

If this is a guest and the "disk" has been increased by the host, a simple reboot will pick up the change - as might partprobe.
"df" shows filesystem size, not partition size.

Reboot if possible and post the output of (as root) "parted -l". Should be simply a matter of using the appropriate filesystem tool to enlarge - can usually be done online these days.

I am agree with "berndbausch"

We donot have LVM its simple partition.

is it single partition can be extend by using diskpart utility.

I don't know about diskpart, but parted and its derivatives can do one of the following:

• If there is unused space right after the partition, it can extend it.
• If not, and there is unused space somewhere else, it can move the partition to the unused space, then extend it.

Moving the partition takes a while. You might be better off doing this:

1. clone your partition with dd
2. repartition your disk
3. copy the clone back

In all cases, after resizing/moving/cloning the partition, you need to extend the filesystem, e.g. with resize2fs or xfs_growfs. Perhaps parted can do that as well, not sure.