strange warning in dashboard

That looks like a disk write error. Either one of two things:
1) The drives that contain the /tmp filesystem for your server is having problems or has crashed.
2) Or that filesystem has actually run out of space. Usually then it just needs a reboot. Too many lock files which will get deleted when the server boots.
Either way tell godaddy the same error but that you get it from another web app. (sometimes you have to lie a little) And if you get no where ask for a supervisor or to have it escalated.

webjunk,
Thanks so much for your reply. The peculiar thing is, the prompts went away and I thought all was fine.

Now it’s back and I’m unable to upload any files.

I’m not sure I know what you mean by too many lock files will get deleted if the server boots.

So what you’re saying is, I should say I’m getting a similar error say from a Joomla installation?

Again, thanks

The error may go away if the server was rebooted. But it may come back.
You really don’t need to know about lock files but (if you have to know) basically your error is on the /tmp file system. As the server needs to handle file requests (say for your website) it will write lock files to that file system. It only needs those lock files on a temp basis but it won’t just remove it when its not needed. EVentually too many lock files means out of space. When the server reboots it will remove the lock files. Then your error will go away. Until it fills up again. Some will schedule a job on the server to delete them. EIther the job ran or the server was rebooted and your message went away.
Either way you need to contact Godaddy and get them to fix it. Or you need to find another hosting company. Do not think its a WP issue. .
If it is the disk going bad and they won’t do anything. You will have to wait for the disk to crash. If I were you would have a backup of your site and database in case the server is a single hard disk.

Not all apps may experience the issue. And not all apps will let you see the error.

webjunk,
Thank you for your response once again. I went into the Cpanel and backed up the database and restored it. The prompt went away but as I am writing another post to my blog, the damn message has appeared once again.

Uploaded file was only partially uploaded
Warning: Unknown(): write failed: No space left on device (28) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

I called GoDaddy. I asked for an escalated response on my problem. The voice on the phone said they offer no support of the kind. Nice…

As they say, you get what you pay for. I’m definitely bummed out. Any advice and recommendations on switching webhosts as seamlesly as possible with as little down time is appreciated.

Currently WordPress is installed as its own folder within my static root folder.

https://www.peterphun.com/blog

Here are the instructions to move WordPress. You want to read the section where it says:
Moving WordPress to a New Server
I would say you have to dump Godaddy. Try Hostgator excellent support.

I did not say to backup your database and then immediatly import it. Sorry but that was a waste. Only that you need to have a backup if the server craps out. Unless you don’t care about your data. The fact that godaddy won’t even give you an answer or escalate it is telling.