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[Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxx>]

To rule out the kernel being the culprit, I build a kernel I'm using with Arch Linux, were green drives stay asleep. IMO it's not caused by the package linux.
There are no differences for the config, that are relevant for the issue.
It's unlikely that there were any additional patches used for the Arch Linux kernel, that are related to the issue.


The spin down/spin up test:

[root@moonstudio weremouse]# t=10800;y=$(smartctl -A /dev/sdc|grep
Lo|awk '{print $NF}');sleep $t;x=$(smartctl -A /dev/sdc|grep Lo|awk
'{print $NF}');printf "\n$(uname -rm)$(lsb_release -d|cut -f2 -d:|cut
-f1 -d"(")\n$x-$y=$((x-y)) spins in $(($t/60/60)) hours\n"

3.10.61-rt65-1-moonstudio x86_64	Ubuntu Wily Werewolf 
15342-15333=9 spins in 3 hours

Arch Linux only makes one spin, when smartctl wakes up the drive after 3
hours.


That's how I build the Ubuntu kernel:

[root@moonstudio src]# export CONCURRENCY_LEVEL=2;wget
https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.10.61.tar.gz
https://www.kernel.org/pub/linux/kernel/projects/rt/3.10/older/patch-3.10.61-rt65.patch.gz
&& tar zxf linux-3.10.61.tar.gz
&& mv linux-3.10.61 linux-3.10.61-rt65
&& cd linux-3.10.61-rt65 && gzip -dc ../patch-3.10.61-rt65.patch.gz | patch -p1
&& cp ../config-3.10.61-rt65-1-rt-lts.01.edit .config
&& make oldconfig && make menuconfig && make oldconfig
&& date
&& make-kpkg clean && make-kpkg --initrd kernel-image kernel-headers && make-kpkg clean
&& date


Most likely the Arch kernel just had two additional patches:

change-default-console-loglevel.patch
fix-race-in-PRT-wait-for-completion-simple-wait-code_Nvidia-RT.patch


Both kernels are configured with CONFIG_X86_64=y and CONFIG_X86=y.
That's the diff of the Arch and Ubuntu config:

$ diff config-3.10.61-rt65-1-rt-lts_x86_64.Arch_Linux_original /boot/config-3.10.61-rt65-1-moonstudio
3c3
< # Linux/x86 3.10.61 Kernel Configuration
---
> # Linux/x86_64 3.10.61 Kernel Configuration
52c52
< CONFIG_LOCALVERSION="-1-rt-lts"
---
> CONFIG_LOCALVERSION="-1-moonstudio"
162c162
< CONFIG_CHECKPOINT_RESTORE=y
---
> # CONFIG_CHECKPOINT_RESTORE is not set
321d320
< CONFIG_ASN1=m
1734c1733
< CONFIG_SCSI_ADVANSYS=m
---
> # CONFIG_SCSI_ADVANSYS is not set
1738,1740c1737,1739
< CONFIG_MEGARAID_MAILBOX=m
< CONFIG_MEGARAID_LEGACY=m
< CONFIG_MEGARAID_SAS=m
---
> # CONFIG_MEGARAID_MAILBOX is not set
> # CONFIG_MEGARAID_LEGACY is not set
> # CONFIG_MEGARAID_SAS is not set
2179c2178
< CONFIG_PCH_GBE=m
---
> # CONFIG_PCH_GBE is not set
4116,4117c4115
< CONFIG_DRM_I915=m
< CONFIG_DRM_I915_KMS=y
---
> # CONFIG_DRM_I915 is not set
5186c5184
< CONFIG_R8187SE=m
---
> # CONFIG_R8187SE is not set
5192,5193c5190,5191
< CONFIG_RTL8192E=m
< CONFIG_R8712U=m
---
> # CONFIG_RTL8192E is not set
> # CONFIG_R8712U is not set
5207,5208c5205,5206
< CONFIG_WLAGS49_H2=m
< CONFIG_WLAGS49_H25=m
---
> # CONFIG_WLAGS49_H2 is not set
> # CONFIG_WLAGS49_H25 is not set
6040,6042c6038
< CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=m
< CONFIG_PUBLIC_KEY_ALGO_RSA=m
< CONFIG_X509_CERTIFICATE_PARSER=m
---
> # CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE is not set
6125d6120
< CONFIG_CLZ_TAB=y
6128d6122
< CONFIG_MPILIB=m

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1484497

Title:
  [Wily] wakes up green drives without a valid reason

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  a minimalist Wily server install, around 4.5 GiB small does cause
  endless spin downs and spin ups, so that green drives get damaged. I
  maintain an around 37.5 GiB large Arch Linux install, quasi using the
  same software used by the Wily install and in addition a little bit
  more software, which isn't used by the Wily install. For Arch Linux I
  don't experience this issue. I expect the same for an Ubuntu install.

  I'm already hunting the culprit, see
  https://lists.ubuntu.com/archives/ubuntu-studio-devel/2015-August/006570.html and
  https://lists.ubuntu.com/archives/ubuntu-studio-devel/2015-August/006571.html,
  but run out of ideas.

  The claim the install is 2 GiB small is a typo, the backup archive is
  of that size.

  However, assumed Ubuntu won't contribute to
  http://andrewmcconnell.photoshelter.com/gallery/G0000oLuiBLHIsmM this
  "feature" should be removed from the defaults.

  $ lsb_release -rd
  Description:	Ubuntu Wily Werewolf (development branch)
  Release:	15.10

  Regards,
  Ralf

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