Syntax highlighting of ReadAhead

ReadAhead is a technique which should improve disk performance.
When small part of the file is read, Linux reads much more data and stores it in internal cache.

To print readahead for disk /dev/hda, use

'''blockdev --getra /dev/hda'''

It is printed in 512-bytes blocks



To modify ReadAhead, use

'''blockdev --setra 1024 /dev/hda'''