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hdparm
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hdparm-functions
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hdparm_is_on_battery() { on_ac_power 2>/dev/null [ $? -eq 1 ] } hdparm_set_option() { local NEW_OPT= NEW_DEF= if test -n "$DISC"; then for i in $OPTIONS; do if test x${i%${i#??}} != x${1%${1#??}}; then NEW_OPT="$NEW_OPT $i" else NEW_OPT=${NEW_OPT%-q} fi done OPTIONS="$NEW_OPT $OPT_QUIET $1" else for i in $DEFAULT; do if test x${i%${i#??}} != x${1%${1#??}}; then NEW_DEF="$NEW_DEF $i" else NEW_DEF=${NEW_DEF%-q} fi done DEFAULT="$NEW_DEF $DEF_QUIET $1" fi } hdparm_eval_value() { case $1 in off|0) hdparm_set_option "$2"0 ;; on|1) hdparm_set_option "$2"1 ;; *) log_failure_msg "Unknown Value for $2: $1" exit 1 ;; esac } # It isn't safe to set an APM policy by default on Firewire or USB devices. # See https://bugs.launchpad.net/bugs/515023. hdparm_try_apm() { # set our default global apm policy here. if [ -z "$ID_PATH" ]; then local ID_PATH="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_PATH=//p')" || true fi case $ID_PATH in pci-*-ieee1394-*|pci-*-usb-*) return 1 ;; esac # Only activate APM on disks that support it. if [ -z "$ID_ATA_FEATURE_SET_APM" ]; then local ID_ATA_FEATURE_SET_APM="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_ATA_FEATURE_SET_APM=//p')" || true fi if [ "$ID_ATA_FEATURE_SET_APM" = "1" ]; then return 0 fi return 1 } # parse /etc/hdparm.conf and spit out a list of options for the specified # disk, taking into account global settings in /etc/hdparm.conf, current AC # power status, and (as a fallback) the default apm settings on Ubuntu. # arguments: device_name # returns 0 on success, 1 on failure. # options to be passed to hdparm are returned on stdout. hdparm_options() { local WANTED_DISK="$1" local DISC= DEFAULT= DEF_QUIET= COMMAND_LINE= # if the below is guaranteed to spawn a subshell, then this next line is # unnecessary local OPTIONS OPT_QUIET KEY SEP VALUE egrep -v '^[[:space:]]*(#|$)' /etc/hdparm.conf | { # set our default global apm policy here. if hdparm_try_apm "$WANTED_DISK"; then if hdparm_is_on_battery; then hdparm_set_option -B128 # set a spindown time of 3 minutes by default so the disk isn't # constantly power cycling on a busy machine if spindown is # enabled hdparm_set_option -S36 else hdparm_set_option -B254 fi fi while read KEY SEP VALUE; do case $SEP in '{') case $KEY in command_line) unset DISC unset OPTIONS unset OPT_QUIET COMMAND_LINE=1 ;; *) if [ -h "$KEY" ] then DISC=$(readlink -m "$KEY") DISC=${DISC%%[[:digit:]]*} else DISC=$KEY fi OPTIONS=$DEFAULT OPT_QUIET=$DEF_QUIET ;; esac ;; =) case $KEY in read_ahead_sect) hdparm_set_option -a$VALUE ;; lookahead) hdparm_eval_value $VALUE -A ;; bus) hdparm_eval_value $VALUE -b ;; apm) if ! hdparm_is_on_battery; then hdparm_set_option -B$VALUE fi ;; apm_battery) if hdparm_is_on_battery; then hdparm_set_option -B$VALUE fi ;; io32_support) hdparm_set_option -c$VALUE ;; dma) hdparm_eval_value $VALUE -d ;; defect_mana) hdparm_eval_value $VALUE -D ;; cd_speed) hdparm_set_option -E$VALUE ;; mult_sect_io) hdparm_set_option -m$VALUE ;; prefetch_sect) hdparm_set_option -P$VALUE ;; read_only) hdparm_eval_value $VALUE -r ;; write_read_verify) hdparm_eval_value $VALUE -R ;; spindown_time) hdparm_set_option -S$VALUE ;; force_spindown_time) hdparm_set_option force_spindown_time$VALUE ;; poweron_standby) hdparm_eval_value $VALUE -s ;; interrupt_unmask) hdparm_eval_value $VALUE -u ;; write_cache) hdparm_eval_value $VALUE -W ;; transfer_mode) hdparm_set_option -X$VALUE ;; acoustic_management) hdparm_set_option -M$VALUE ;; keep_settings_over_reset) hdparm_eval_value $VALUE -k ;; keep_features_over_reset) hdparm_eval_value $VALUE -K ;; chipset_pio_mode) hdparm_set_option -p$VALUE ;; security_unlock) hdparm_set_option --security-unlock $VALUE ;; security_pass) hdparm_set_option --security-set-pass $VALUE ;; security_disable) hdparm_set_option --security-disable $VALUE ;; user-master) hdparm_set_option --user-master $VALUE ;; security_mode) hdparm_set_option --security-mode $VALUE ;; ROOTFS) ;; *) echo "Unknown option $KEY" exit 1 ;; esac ;; "") case $KEY in '}') if [ -z "$DISC" ] && [ -z "$COMMAND_LINE" ]; then echo "No disk enabled. Exiting" >&2 return 1 fi if [ -n "$OPTIONS" ] && [ "$DISC" = "$WANTED_DISK" ] then echo $OPTIONS return 0 fi COMMAND_LINE= ;; quiet) if [ -n "$DISC" ]; then OPT_QUIET=-q else DEF_QUIET=-q fi ;; standby) hdparm_set_option -y ;; sleep) hdparm_set_option -Y ;; disable_seagate) hdparm_set_option -Z ;; security_freeze) hdparm_set_option --security-freeze ;; *) if [ -z "$COMMAND_LINE" ]; then echo "unknown option $KEY" >&2 return 1 fi ;; esac ;; *) if [ -z "$COMMAND_LINE" ]; then echo "unknown separator $SEP" >&2 return 1 fi ;; esac done # parsed the whole file and didn't find the disk, # so try the default instead. if [ -n "$DEFAULT" ]; then echo $DEFAULT return 0 fi } }