Trying to resize2fs EB volume fails [closed]

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.

Coffin

what's the output of mount, df -h and fdisk -l /dev/sdf? Are you able to mount the volume? – Donyadoodad

I can mount it and df -h says: /dev/sdf 200G 187G 14G 94% /vol ` fdisk -l /dev/sdf Disk /dev/sdf: 858.9 GB, 858993459200 bytes 255 heads, 63 sectors/track, 104433 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Disk /dev/sdf doesn't contain a valid partition table` – Coffin

Are you using the ext filesystem? – Donyadoodad

not sure - how would i find out? – Coffin

either grep "/dev/sdf" < /etc/fstab or mount the volume and type mount | grep "/dev/sdf" – Donyadoodad

/dev/sdf on /vol type xfs (rw) – Coffin

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 )

Donyadoodad

xfs_growfs worked for me on centos 7 – Pricefixing

fsadm resize worked for me – Archerfish

for some reason i needed to do sudo growpart /dev/xvda 1 before sudo xfs_growfs /vol. – Killy