Question

I have a 200GB EBS volume and am trying to increase the space available. I followed the instructions on: http://www.hellersoftware.com/2012/resize-ebs-volume-attached-to-amazon-web-services-ec2-instance/ and managed to create a snapshot and create a new EBS based on that snapshot.

Everything is peachy, except when I do:

# resize2fs /dev/sdf

I get

resize2fs 1.40.8 (13-Mar-2008)
resize2fs: Bad magic number in super-block while trying to open /dev/sdf
Couldn't find valid filesystem superblock.

Not sure what’s going on there, but my new volume still only shows 200GB, when in fact it’s an 800GB volume.

Answer 1

The OP stated that he was using the XFS filesystem.
The tool resize2fs works with ext2, ext3 and ext4 only.

There’s a similar tool available for the XFS filesytem called xfs_growfs.
You’ll most likely have to install it first

sudo yum install xfsprogs.x86_64 --assumeyes

then mount your filesystem

sudo mount -t xfs /dev/sdf /vol

now you can extend the filesystem

sudo xfs_growfs /vol

df -h should now show more available space

I hope this helped 🙂

Tip: ext4 filesystem is the recommended filesystem for EBS volumes ( for the future )