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1 --- a/pm/power.d/harddrive
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2 +++ b/pm/power.d/harddrive
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3 @@ -23,7 +23,7 @@
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4 $0: Control hard drive spindown, write caching,
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5 power management and acoustic management.
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6
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7 -This hook has 8 tuneable parameters:
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8 +This hook has 6 tuneable parameters:
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9 DRIVE_SPINDOWN_VALUE_AC = time until a drive will spin down on AC
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10 Defaults to 0, which disables drive spindown.
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11 DRIVE_SPINDOWN_VALUE_BAT = time until a drive will spin down on battery
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12 @@ -45,14 +45,6 @@
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13
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14 See the -B option on the hdparm man page
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15
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16 -Drive acoustic management:
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17 -DRIVE_ACOUSTIC_MGMT_AC = Drive Acoustic Management value on AC
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18 -Defaults to 254 for max head speed.
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19 -DRIVE_ACOUSTIC_MGMT_BAT = Drive Acoustic Management value on battery
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20 -Defaults to 128 for max quietness.
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21 -
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22 -See the -M option on the hdparm man page.
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23 -
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24 Drives to manage:
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25 DRIVE_LIST = the list of hard drives to manage.
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26 Defaults to "/dev/[hs]d[a-z]", which will manage up to the first 25 drives.
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27 @@ -62,8 +54,7 @@
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28
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29 harddrive_ac () {
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30 for dev in $DRIVE_LIST; do
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31 - # disable write caching, do not spin down the drive, disable APM
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32 - # and acoustic management, and sync everything to drive.
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33 + # enable write caching, do not spin down the drive, disable APM
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34 printf "Disabling hard drive power management for %s..." "$dev"
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35 hdparm -W $DRIVE_WRITE_CACHE_AC \
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36 -S $DRIVE_SPINDOWN_VALUE_AC \
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37 @@ -75,12 +66,12 @@
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38
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39 harddrive_battery() {
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40 for dev in $DRIVE_LIST; do
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41 - # disable write caching, enable acoustic management
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42 + # disable write caching, spin down the drive, enable APM
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43 + # and sync everything to drive.
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44 printf "Enabling power management for %s..." "$dev"
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45 hdparm -W $DRIVE_WRITE_CACHE_BAT \
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46 -S $DRIVE_SPINDOWN_VALUE_BAT \
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47 - -B $DRIVE_POWER_MGMT_BAT \
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48 - -M $DRIVE_ACOUSTIC_MGMT_BAT -F $dev >/dev/null 2>&1 \
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49 + -B $DRIVE_POWER_MGMT_BAT -f $dev >/dev/null 2>&1 \
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50 && echo Done. || echo Failed.
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51 done
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52 }
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