Disk space not "sticking" [closed]

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I've been beating my head against the wall over here... ha. Okay, so I:

1. Create a 20GB persistent disk with CentOS 6.
2. Create an instance with "existing persistent disk" (w/ kernal gce-v20130603) which has an image on it... so it boots fine.
3. When I ssh into it (using putty) and check hdd space (df -h) I get the standard 10GB.

As you can see, when I check the instance I see the disk I made... 20GB but Linux reports 10.

Do I need to fdisk and make the volume bigger (to it's 20GB)?

Answer 1

df(1) gives you the size of the file system on the partition, not the size of the partition itself.

Have a look at /proc/partitions, and see if the sizes are different there.

resize2fs(8) will resize Linux ext filesystems, xfs_growfs(8) will do so with XFS file systems. In default mode, they will grow the file system to fill the partition. There's no need to invoke fdisk(8).