MySQL Fatal Error

MySQL Error!
------------------------

The Error returned was:
Can't create/write to file '/tmp/#sql_54e4_0.MYI' (Errcode: 28)

Error Number:
1

SELECT id, title, date, category, alt_name, short_story, flag FROM el_post WHERE MATCH (title, short_story, full_story, xfields) AGAINST ('JOHAN GIELEN/VARIOUS - Global Sessions Summer 2010 Artist:  JOHAN GIELEN/VARIOUSTitle: Global Sessions Summer 2010Label:  Black Hole HollandStyle: TranceDate: 26 Jul 2010Quality: 320 kbps mp3 downloadpart 1part 2Tracklist:01. Suspect 44 - Hold Me (Nick Stoynoff Remix)                                                     (09:04)02. Nic Chagall & Rank 1 & Wippenberg - 100 (Edit)                                                 (04:15)03. Julius Beat & Eddy Karmona - Pure Love (Da Others & Andrea Saenz vs. Herbert B Unplugged Mix)  (07:08)04. Johan Gielen pres. Horace P. Monroe - I\'m Lonely (Redroche Remix)                              (06:17)05. Alex Kunnari & Heikki L & Max\'C - Brand New Day (Lovetone Remix)                               (05:45)06. Alpha 9 - Come Home                                                                            (06:09)07. Lost Stories pres. Prayag & Rishab - Ashna (Johan Gielen Remix)                                (06:28)08. Arty - Hope                                                                                    (06:37)09. Tom Cloud feat. Antonia Lucas - Silent Sun (David Forbes Dubb Refit)                           (08:15)10. DJ Observer & Daniel Heatcliff feat. Hannah Ray - With Me (Original Vocal Mix)                 (08:25)11. Airscape - Amazon Chant (Lost Stories Remix)                                                   (07:55)12. Virtual Vault feat. Orjan - Too Late (Jonas Steur Remix)                                       (07:52)13. Re-Zone - Brainstorm                                                                           (06:38)14. Marco V feat. Benjamin Bates - WTNF (Redub)                                                    (05:40)15. Svenson & Gielen - The Beauty Of Silence (W&W vs. Jonas Stenberg Remix Edit)                   (02:58)16. DJ Eremit & R.O.N.A.M - Herzschlag (YOMC Remix)                                                (07:34)17. VA - Global Sessions Summer 2010 (mixed by Johan Gielen)                                       (76:19) ') AND id != 18365 AND approve='1' AND date < '2013-05-18 20:42:10'ORDER BY RAND() LIMIT 5