I know that there are many question about this topic. However, I did not find a solution for my situation.
What I want to achieve: My HDD (Hitachi Travelstar 5k1000) in my notebook should go into standby after ~5min and the load cycle value should only increase moderately.
My setup: Ubuntu 14.04 is installed on an SSD and the HDD is only used for data. I checked the APM values for the HDD via
sudo hdparm -B /dev/sda and got
APM_level = 254
for AC and for battery
APM_level = 128
Right now the HDD never goes into standby mode. However, if my notebook runs on battery, the Load_Cycle_Count increases tremendously (2-3 per minute).
As I understand it, an APM level <=127 allows the HDD to go into standy (=spin down?), so APM=128 prevents standby but still increases LCC heavily. What are my options to achieve my goal?
Maybe related: Up to now I do not use any laptop-mode-tools or TLP etc. If it is useful/helpful I would also appreciate solutions which make use of TLP (for example).