SQL Error Out Of Nowhere!?

[Jaske]

I don't know what happened but all of a sudden I began getting e-mails from my database for my forum and when I log into my admincp and try to go to options I get the following:
Database error in vBulletin 4.0.8:

Invalid SQL:

SELECT setting.*, settinggroup.grouptitle
FROM settinggroup AS settinggroup
LEFT JOIN setting AS setting USING(grouptitle)
WHERE settinggroup.displayorder <> 0
ORDER BY settinggroup.displayorder, setting.displayorder;

MySQL Error : Can't create/write to file '/tmp/#sql_5ed9_0.MYI' (Errcode: 22)
Error Number : 1
Request Date : Friday, January 21st 2011 @ 10:07:29 PM
Error Date : Friday, January 21st 2011 @ 10:07:30 PM
Script : http://www.**********.com/forum/admincp/options.php?null=0
Referrer : http://www.**********.com/forum/admincp/index.php?do=navI set the forum up, let it go live 2 days ago with every recommended security addon to avoid being hacked so I'm pretty sure I haven't been hacked.

the forum itself works fine except the media library throws up this error:
LEFT JOIN media AS media ON (media.categoryID = media_category.categoryID)
WHERE catOrder != '0'
GROUP BY media_category.categoryID
ORDER BY media_category.catOrder;

MySQL Error : Can't create/write to file '/tmp/#sql_5ed9_0.MYI' (Errcode: 22)
Error Number : 1
Request Date : Friday, January 21st 2011 @ 10:07:07 PM
Error Date : Friday, January 21st 2011 @ 10:07:08 PM
Script : http://www.**********.com/forum/media.php
Referrer : http://www.**********.com/forum/forum.phphas anyone else had this problem? I googled it but the only things I found were people getting similar errors when they try to get into their admincp...I can get in fine and the only link I have trouble with is "options>settings".

PLEASE help....thanks.

[Thunderbird8]

Looking at the error in question, this doesn't seem to have anything to do with your board itself.

Can't create/write to file '/tmp/#sql_5ed9_0.MYI' (Errcode: 22)

Is there something up with the tmp directory on the server? Is the disk in good shape?