This is what my host replied:
I am trying to delete some dead accounts off of my server and get this error:
The /usr, /, or /var partition on this server is running out of disk space. This WHM operation has been temporarily suspended to prevent something bad from happening. Please ask your system admin to remove any files not in use on that partition.
So, I deleted apache and dom logs, and it worked. The drive was no longer full. :cool:
/var holds log files and mail and databases
/usr has apache logs and domain logs
One, or both, of those must be full. You'll have to delete files via ssh.