MySQL's Error Code 28: What Are It's Common Causes And Other Pertinent

This is part 1 of a personal tragic-comic narrative starring myself, a simple, unassuming end-user of value-based web hosting services, and the supreme villain of this pathetic tale, the Iago to my Othello, would be a verminous, sub-human parasite collective disguised as a professional web-hosting company in the vicinity of Columbus, Ohio.

Speaking of Shakespeare, it seems to this humble WHT supplicant that the comedy of errors authored by the entities in question, a craven crew of possum-bellied, pigeon-brained menagerie of cubicle-dwelling subhuman troglodytes masquerading as ethical business-persons and capable hosting providers, is so egregious that if a scale of measurement is ever devised for web-hosting incompetence, it should be named after this company, in recognition of their utter incompetence and arbitrary imbecilic buffoonery disguised as reasonable technical support and customer service.

Apparently this company thinks it's more important to use their scale-encrusted rat-tails to cover up their own mistakes instead of giving reasonable responses to customer questions regarding apparent server issues.

Which brings me to my initial question:

MySQL's docs say that Error Code 28 results from lack of disk space or write permissions.

What are the common causes of this? Who has the power to control it from happening, the web host or the end user?( in this arrangement, the host is running an overloaded server and controls all of the configurations and aspects of the server while the user is using secure software with moderate usage of bandwidth and database queries).

I have additional questions in regards to a more general issue regarding failure to write/open to directories as well, but I'll wait for some responses first.

Excellent forum, by the way.