1

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

/dev/sda:
APM_level = 254

for AC and for battery

/dev/sda:
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).

3
  • To get it to standby after 5min, you need to add -S 60 option, as in hdparm -S 60. There are several ways to automate it. askubuntu.com/questions/711019/… – mikewhatever Jan 2 '16 at 13:10
  • But I need APM <=127 for this to work, right? If I set APM to 127 and usee hdparm -S 60 the disk goes into standby immediately and does not wait 5min. AHCI is enabled in BIOS. – Merlin1896 Jan 2 '16 at 13:25
  • Try it both ways, if unsure. – mikewhatever Jan 2 '16 at 13:36
0

This is quite simple with TLP.

LCC: as a first guess i suggest to configure

DISK_APM_LEVEL_ON_BAT=192

and monitor LCC afterwards.

Spindown: configure

 DISK_SPINDOWN_TIMEOUT_ON_AC="60 0"
 DISK_SPINDOWN_TIMEOUT_ON_BAT="60 0"

(assuming HDD is sda)

It's all in the TLP FAQ btw.

ps. some more explanation: there is no conflict using APM >= 128 (hdparm -B) and spindown (-S) at the same time (i use it myself). It's however important to always set spindown after (or together with) APM because hdparm -B clears the -S setting. TLP considers this automatically.

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.