Even when my settings are like the ones below in laptop-mode.conf, I
still get spin down.

#
# Power management for HD (hdparm -B values)
#
BATT_HD_POWERMGMT=254
LM_AC_HD_POWERMGMT=254
NOLM_AC_HD_POWERMGMT=254


I don't want my harddrive to spin down, but I do want medial harddrive settings 
like head parking and so forth.  That's why I think an hdparm -B value of 128 
is ideal for me.  It says in man hdparm that a -B value of 128 through 254 does 
not permit spin down, yet it happens on any value (128 and even 254).  I wonder 
if there's something new overriding hdparm or if it's a recent bug in hdparm or 
the kernel.  

I checked up on hdparm -I /dev/sda1 to see what power management value
is set, and it says it's disabled!  Then when I manually enter hdparm -B
128 /dev/sda1, it works exactly as it should.  So I'm not sure what
could be causing this.  Something is going around hdparm to handle the
harddrive power management, which is either intentional or not.  Any
thoughts?

-- 
harddrive spins down when it shouldn't in laptop-mode
https://bugs.launchpad.net/bugs/286846
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