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A bit of a question.

Does anyone know the cause of Error Code 30?

This was my full error message:

MyBB SQL Error
MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1 - Can't create/write to file '/tmp/#sql_185f_0.MYI' (Errcode: 30)
Query:
SHOW COLUMNS FROM mybb_users LIKE 'unreadpms'
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