On Thu, Dec 7, 2017 at 11:06 PM, Tim <ignored_mailbox@yahoo.com.au> wrote:

Allegedly, on or about 7 December 2017, Fulko Hew sent:
> To disable the Advanced Power Management and to stop the head
> unload/clicking I've always used:
>
> hdparm -B 255 /dev/sda
>
> But on this machine/drive, it doesn't seem to work;
> or at least it only works for a short while, and then it starts
> unloading again.

Is this "short while" in the middle of an active session, or have you
suspended/hibernated/rebooted/powered-down, in the meantime?

​No, I've been through all those issues.

The system is live, and hasn't even timed-out an turned off the screen.​

You may need to look into your power-management settings, and make sure
that any wake-up/thaw events reprogram the setting. I had to do that
with mine.

​I've looked into those, and haven't found anything related.

​

> More importantly, the next time I try to disable it,it says its
> disabled, but the drive carries on clicking, and the Load_Cycle_Count
> still keeps going up.

Try a different value, such as 254, instead.

​That was the second thing I tried, all to no avail.

Its as if the drive ignores whatever hdparm does.

​I also just tried (with no success)

hdparm -S 0 /dev/sda