Forum de U-Sub

PDO Exception Caught. Error with the database:
SQL Query: SELECT task_id, task_progress, t.user_id as user_id, t.file_id as file_id, task_label, task_type, task_prev_task, task_comparo_link, file_name, file_hash, DATE_FORMAT(file_upload_date, '%d/%m/%Y, %H:%i') as file_upload_date, file_line_count, file_download_count, file_start_time, file_end_time, username, user_colour, topic_id, IFNULL(ty.edit_count, 0) as typo_edit_count FROM work_task t LEFT JOIN work_file f ON t.file_id = f.file_id LEFT OUTER JOIN (SELECT file_id, COUNT(*) as edit_count FROM typo_prod.cues_history GROUP BY file_id) ty ON ty.file_id = t.file_id LEFT JOIN forum_prod.phpbb3_users u ON t.user_id = u.user_id LEFT JOIN work_training tr ON tr.user_id = t.user_id AND u.group_id = 855 WHERE episode_part_id = :epid ORDER BY task_prev_task

Error: SQLSTATE[HY000]: General error: 1030 Got error 28 from storage engine
Code: HY000
File: /home/atelier/www/inc/db.inc.php
Line: 34
Trace: #0 /home/atelier/www/inc/db.inc.php(34): PDOStatement->execute(Array)
#1 /home/atelier/www/inc/ficheatelier.class.php(821): db->query('SELECT task_id,...', Array)
#2 /home/atelier/www/pages/episode.php(102): FicheAtelier::getTaskList('31140')
#3 /home/atelier/www/index.php(176): include('/home/atelier/w...')
#4 {main}

[phpBB Debug] PHP Warning: in file Unknown on line 0: Unknown: write failed: No space left on device (28)
[phpBB Debug] PHP Warning: in file Unknown on line 0: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php5)