Chyba v e-shopu: open(…) failed: No space left on device*

<?php
/*
* Quick.Cart by E-shop-centrum.cz
* www.e-shop-centrum.cz
* Licence GNU GPL
*/
extract( $_GET );
session_start( );

if( !isset( $_SESSION['iCustomer'] ) )
  $_SESSION['iCustomer'] = time( ).rand( 100, 999 );

require_once 'config/general.php';
require_once DB_CONFIG_LANG;

if( !isset( $p ) || $p == '' ){
  $p  = $config['start_page'];
}
else
  $p = htmlspecialchars( $p );

if( strstr( $p, 'Gallery' ) ){
  $p          = ereg_replace( 'Gallery', '', $p );
  $bGallery   = true;
  $sBlockPage = '_GALLERY';
}

if( !isset( $iCategory ) )
  $iCategory = null;

Warning: session_start() [function.session-start]: open(/var/lib/php5/sess_da038cbd90b61aae17f6eeb6282095ce, O_RDWR) failed: No space left on device (28) in /home/free/ic.cz/j/jezekvkleci/root/obchod/index.php  on line 8

Warning: Unknown: open(/var/lib/php5/sess_da038cbd90b61aae17f6eeb6282095ce, O_RDWR) failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php5) in Unknown on line 0

Warning: Unknown: open(/var/lib/php5/sess_da038cbd90b61aae17f6eeb6282095ce, O_RDWR) failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php5) in Unknown on line 0