diff options
| author | Victor Lowther <victor.lowther@gmail.com> | 2008-06-28 11:38:28 -0500 |
|---|---|---|
| committer | Victor Lowther <victor.lowther@gmail.com> | 2010-06-05 13:32:49 -0500 |
| commit | 6662c9f80bc8e914e826a009cdf0755d442687c8 (patch) | |
| tree | 379c5c34d925b935682e878bcd8ba39d6348178f | |
| parent | 1ab9f81812861c9fbab59c53a1fd50b3077d6a0f (diff) | |
Richard raised concerns about hard drive spindown.
So the harddrive hook no longer tries to spin the drive down pending
some sort of consensus on the right thing to do to make the hard drive
save power.
In the mean time, though, just flat-out disable write caching on the
hard drive. I know that there are barriers and flushes that the ATA layer
uses to ensure that data really is written to the disk, but hard drive cache
isn't battery backed.
| -rw-r--r-- | pm/power.d/harddrive | 9 | ||||
| -rw-r--r-- | pm/power.d/laptop-mode | 2 |
2 files changed, 6 insertions, 5 deletions
diff --git a/pm/power.d/harddrive b/pm/power.d/harddrive index cdfa637..604f2ca 100644 --- a/pm/power.d/harddrive +++ b/pm/power.d/harddrive @@ -4,15 +4,16 @@ harddrive_ac () { for dev in /dev/[hs]d[a-z]; do - #enable write caching, do not spin down the drive. - hdparm -W 1 -S 0 $dev + # disable write caching, do not spin down the drive, disable APM + # and acoustic management, and sync everything to drive. + hdparm -W 0 -S 0 -B 254 -M 254 -f -F $dev done } harddrive_battery() { for dev in /dev/[hs]d[a-z]; do - # disable write caching, spin down after 30 seconds - hdparm -W 0 -S 6 $dev + # disable write caching, enable acoustic management + hdparm -W 0 -M 128 $dev done } diff --git a/pm/power.d/laptop-mode b/pm/power.d/laptop-mode index 8e0fbdf..0e35f67 100644 --- a/pm/power.d/laptop-mode +++ b/pm/power.d/laptop-mode @@ -16,7 +16,7 @@ laptop_mode_battery() { echo 1 >$VM/laptop_mode echo 1 >$VM/dirty_background_ratio echo 60000 >$VM/dirty_expire_centisecs - echo 60 >$VM/dirty_ratio + echo 85 >$VM/dirty_ratio echo 60000 >$VM/dirty_writeback_centisecs } |