Extending Linux physical partition in AWS EC2

Once I got to the problem that an old server migrated to AWS had used 100% of available storage. Lucky me, it was in AWS EC2 and I were able to simply create a snapshot of the EBS volume and then create another volume from the snapshot which had twice the size of old one.

*It is notable that data lost was intolerable!

Until here was easy, and I thought it is going to remain that way using resize2fs tool. But the tool simply said that there partition is already using full disk size! while there was unused space there. So after some search I found the http://litwol.com/content/fdisk-resizegrow-physical-partition-without-losing-data-linodecom article and adapt it to my case.

The difference of my case was that the server partition was DOS partition and not ex* partition. This is what I did to fix it:

List disks and write down “Start” and “Id” for /dev/xvda1 (These two piece of data are extremely important for successfully finishing the task). In my case Start was 63 and Id was 8e.

fidsk -l

And then delete the partition, and create larger a new one with exact same start point:

fdisk -c=dos -u=sectors /dev/xvdc

(The red characters are my response)

(fdisk) Command (m for help): d
(fdisk) Partition number (1-4): 1
(fdisk) Command (m for help): n
(fdisk) Partition type:
p primary
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (63-40558591, default 63): 63
Last sector, +sectors or +size{K,M,G} (63-40558591, default 40558591): 40558591
(fdisk) Command (m for help): t
Partition number (1-4): 1
Hex Code (type L to list codes): 8e
(fdisk) Command (m for help): w

Now we use resize2fs to finalize everything:

resize2fs /dev/xvdc1

At the end you can check the storage device by “lsblk” or “fdisk -l”.

Advertisements

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