Error on index

I havnt been on my blog in a while and im getting this error:

“

WordPress database error: [Can’t create/write to file ‘/tmp/#sql_6c0e_0.MYD’ (Errcode: 17)]
SELECT DISTINCT * FROM wp_posts WHERE 1=1 AND post_date_gmt <= ‘2006-04-30 08:55:59’ AND (post_status = “publish” OR post_author = 1 AND post_status != ‘draft’ AND post_status != ‘static’) AND post_status != “attachment” GROUP BY wp_posts.ID ORDER BY post_date DESC LIMIT 0, 10
“
How can I fix it? Thanks ??