rc.local

rc.local

#!/bin/bash

# disk tuning (8TB HDD) #

for DISK in sda sdb sdc
do
    SCHED=/sys/block/${DISK}/queue/scheduler
    if [[ -f "$SCHED" ]]; then
        # select deadline scheduler first
        echo deadline > $SCHED
    fi

    # now set deadline scheduler parameters
    SCHED_RE=/sys/block/${DISK}/queue/iosched/read_expire
    if [[ -f "$SCHED_RE" ]]; then
        echo 100 > $SCHED_RE
    fi

    SCHED_WS=/sys/block/${DISK}/queue/iosched/writes_starved
    if [[ -f "$SCHED_WS" ]]; then
        echo 4 > $SCHED_WS
    fi
done