Description of Problem:

Running hdparm without any arguments gives a list of option, where -B is 
described as "Get the Power Management value" or maybe it is "Acoustic 
Management", I do not recall, but it is "Get". But if I try "hdparm -
B /dev/hda" it complains that a value for "-B" is missing. If I try something 
like "hdparm -B 129 /dev/hda" then it is accepted and a difference can be seen 
in the AdvancedPM line of the "hdparm -I /dev/hda" output.

Version-Release number of selected component (if applicable):

hdparm on the redhat 7.2 admin/rescue CD ( the credit card sized CD )