K 10 svn:author V 3 mav K 8 svn:date V 27 2011-07-29T20:32:27.701182Z K 7 svn:log V 268 Add control for ATA disk read-ahead, alike to the previously added write cache control. Some controller BIOS'es tend to disable read-ahead, that dramatically reduces read performance. Previously ata(4) always enabled read-ahead unconditionally. Approved by: re (kib) END