1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #!/bin/bash # # Copyright (C) 2012 Canonical # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # get_load_cycle() { smartctl -A /dev/sda | grep Load_Cycle_Count | awk '{print $10}' } get_time_secs() { date "+%s" } if [ $EUID -ne 0 ]; then echo "Need to run as root e.g. use sudo" exit 1 fi hdparm -B 127 /dev/sda TEST_FILE=test MAX_TIMEOUT=60 MAX_ITERATIONS=10 dirty_disk() { rm -f ${TEST_FILE} touch ${TEST_FILE} truncate -s 4K ${TEST_FILE} } drop_caches() { sync (echo 1 | sudo tee /proc/sys/vm/drop_caches) > /dev/null (echo 2 | sudo tee /proc/sys/vm/drop_caches) > /dev/null (echo 3 | sudo tee /proc/sys/vm/drop_caches) > /dev/null } find_load_cycle_threshold() { lc1=0 lc2=0 count=0 TIMEOUT=1 echo Attempting to find Spin Down timeout for this HDD while [ $lc1 -eq $lc2 -a $TIMEOUT -lt $MAX_TIMEOUT ] do lc1=$(get_load_cycle) count=$((count + 1)) dirty_disk drop_caches sleep $TIMEOUT lc2=$(get_load_cycle) n=$((lc2 - lc1)) echo Checking with timeout: $TIMEOUT seconds, Load Cycles: $n if [ $TIMEOUT -lt 15 ]; then TIMEOUT=$((TIMEOUT + 1)) else TIMEOUT=$((TIMEOUT + $TIMEOUT/5)) fi done } exercise_load_cycle() { echo "Attempting to exercise load cycle on HDD" i=0 t1=$(get_time_secs) n1=$(get_load_cycle) # bump timeout by 1 second just to make sure # we can always catch the load cycle window TIMEOUT=$((TIMEOUT + 1)) while [ $i -lt $MAX_ITERATIONS ] do i=$((i + 1)) echo "Load Cycle $i of $MAX_ITERATIONS" dirty_disk drop_caches sleep $TIMEOUT done i=0 t2=$(get_time_secs) n2=$(get_load_cycle) t=$((t2 - t1)) n=$((n2 - n1)) echo "Managed to force $n Load Cycles in $t seconds." life=$((1000000 * $t / $n)) days=$((life / (3600 * 24))) echo "At this rate, the HDD will fail after $days days." } find_load_cycle_threshold if [ $TIMEOUT -lt $MAX_TIMEOUT ]; then echo "HDD seems to be spinning down aggressively." exercise_load_cycle exit 1 else echo "Gave up looking for Load Cycle timeout threshold, HDD looks sane." exit 0 fi
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