Ubuntu
hdparm package

  1. Bug #952556
  2. Comment #79

Comment 79 for bug 952556

Revision history for this message
Steve Langasek (vorlon) wrote : Re: [Bug 952556] Re: [Precise] [Hardware-killer] HD restarts every few seconds

On Wed, May 16, 2012 at 03:04:07PM -0000, Torsten Römer wrote:
> Sounds reasonable, and without wanting to turn this bug report into a
> discussion thread: Are there some interesting values for apm_battery
> between 128 and 254 to try out, to sort of find a good trade-off between
> lots of load cycles vs. heads never being parked? I googled without much
> success, it seems to be all or nothing.

The meaning of these values is very implementation-dependent. As the
hdparm(8) manpage says, 1-127 "permit spin-down", and 128-254 "do not permit
spin-down"; other than that, there's no requirement for different values to
give different results, except that the lower the number the more aggressive
the power management.

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