[Bug 952556] Re: [Precise] [Hardware-killer] HD restarts every few seconds

Fri May 18 10:34:41 UTC 2012

Dear any interested,

I just found out that the hdparm -B and -S parameters were being overridden by the laptop_mode-tools. Whenever I put my laptop on battery after using it on AC, its hdparm values set at boot time are overridden by the settings inside the following file (if you have laptop_mode-tools installed, that is). I hope this will give insight to the devs to do something about this issue. 
I checked it myself by modifying BATT_HD_POWERMGMT from 1 to 128 and voila, it keeps its 128 value.

Surely, the laptop_mode-tools is the place to fine tune the hdparm vales
while on battery.

an excerpt of:  sudo gedit /etc/laptop-mode/laptop-mode.conf

#
# Idle timeout values. (hdparm -S)
# Default is 2 hours on AC (NOLM_HD_IDLE_TIMEOUT_SECONDS=7200) and 20 seconds
# for battery and for AC with laptop mode on.
#
LM_AC_HD_IDLE_TIMEOUT_SECONDS=20
LM_BATT_HD_IDLE_TIMEOUT_SECONDS=20
NOLM_HD_IDLE_TIMEOUT_SECONDS=7200

# Should laptop mode tools control the hard drive power management settings?
#
# Set to 0 to disable
CONTROL_HD_POWERMGMT="auto"
#
# Power management for HD (hdparm -B values)
#
BATT_HD_POWERMGMT=1
LM_AC_HD_POWERMGMT=254
NOLM_AC_HD_POWERMGMT=254

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https://bugs.launchpad.net/bugs/952556

Title:
  [Precise] [Hardware-killer] HD restarts every few seconds

Status in “hdparm” package in Ubuntu:
  Fix Released
Status in “hdparm” source package in Precise:
  Fix Released
Status in “hdparm” source package in Quantal:
  Fix Released

Bug description:
  [Impact]
  This issue has the potential to cause additional mechanical wear and tear on rotational hard drives by causing them to spin up and down more frequently than in previous Ubuntu releases.  While the intent of a development change in the precise cycle was to allow drives to spin down sooner and stay spun down, in practice users report their drives spin back up quickly.  Until this is resolved, an aggressive spin-down policy is dangerous for hardware and inappropriate.

  [Test Case]
  1. On a laptop with a rotational hard drive, unplug main power and run on battery.
  2. Run sudo smartctl -a /dev/sda|grep Load_Cycle_Count repeatedly, to observe that the count increases once every few seconds.
  3. Install hdparm from precise-proposed.
  4. Plug the laptop back into main power, then unplug it again.
  5. Run the command from step 2 again.  Observe that the count is no longer increasing or is increasing much more slowly.  (Note that the precise behavior will vary from hard drive to hard drive, and on some systems there will be no difference visible at all.)

  [Regression Potential]
  For some users the current setting does not meaningfully increase wear and tear on their drives, but changing it will increase power consumption.  This seems to be a necessary evil since there's no single power saving setting that works well for all drives.

  Hi,

  After update from Oneiric to Precise Beta 1, kernel 3.2.0-18-generic,
  I notice that, when on battery, my Dell XPS  M1330 laptop has its HD
  spin down, then restart, very, very, very often, which means several
  times per minute.

  At this pace the HD won't live long, and this reminds to me a problem
  we had few years ago with "disk killers" linuxes that were
  unloading/reloading the HD heads much too often, killing disks in a
  couple of months.

  So I prefer to ring the alarm bell early...

  Upgrading from Oneiric to Precise I didn't change any power management
  parameter, but it definitely didn't do this before (and still doesn't
  do this on other distros I have on multiboot, so that's no hardware
  issue, only Precise does that on my machine...)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-18-generic 3.2.0-18.28
  ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
  Uname: Linux 3.2.0-18-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.94.1-0ubuntu2
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  michel     3044 F.... pulseaudio
  CRDA:
   country FR:
    (2402 - 2482 @ 40), (N/A, 20)
    (5170 - 5250 @ 40), (N/A, 20)
    (5250 - 5330 @ 40), (N/A, 20), DFS
    (5490 - 5710 @ 40), (N/A, 27), DFS
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf6dfc000 irq 46'
     Mixer name	: 'Silicon Image SiI1392 HDMI'
     Components	: 'HDA:83847616,1028020a,00100201 HDA:10951392,1028020a,00100000'
     Controls      : 33
     Simple ctrls  : 19
  CheckboxSubmission: 1ea6109db29b53f721a523a77b7f3abf
  CheckboxSystem: d00f84de8a555815fa1c4660280da308
  Date: Sun Mar 11 22:25:00 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=0e7ded16-c4fc-4f81-8562-3cb1196809d3
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MachineType: Dell Inc. XPS M1330
  ProcEnviron:
   LANGUAGE=fr_FR:fr:en_US:en
   TERM=xterm
   PATH=(custom, user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-18-generic root=/dev/mapper/VG1-UBUNTU ro clocksource=hpet quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-18-generic N/A
   linux-backports-modules-3.2.0-18-generic  N/A
   linux-firmware                            1.71
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-03-10 (1 days ago)
  dmi.bios.date: 12/26/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0N6705
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0N6705:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: XPS M1330
  dmi.sys.vendor: Dell Inc.

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