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Just Notes.

Laptop Hard drive being damaged : Ubuntu

I have read many blogs regarding laptop hard disk being damaged , especially with power management on laptops and unnecessary disk activities. one of them i came across about firefox makes unnecessary hit to hard disk. and i hope this will not happen in windows.

ok lets demo this..

$sudo dmesg -c

opening a new tab and going to a website (two times)

$dmesg | grep firefox

result :

[ 1900.468000] firefox-bin(6521): dirtied inode 18829523 (sessionstore-1.js) on dm-2
[ 1900.468000] firefox-bin(6521): dirtied inode 18829540 (?) on dm-2
[ 1901.580000] firefox-bin(6521): dirtied inode 19927160 (_CACHE_001_) on dm-2
[ 1901.580000] firefox-bin(6521): dirtied inode 19927160 (_CACHE_001_) on dm-2
[ 1901.896000] firefox-bin(6521): dirtied inode 19927160 (_CACHE_001_) on dm-2
[ 1910.504000] firefox-bin(6521): dirtied inode 18829540 (sessionstore-1.js) on dm-2
[ 1911.568000] firefox-bin(6521): dirtied inode 18826308 (history.dat) on dm-2
[ 1911.568000] firefox-bin(6521): dirtied inode 18826308 (history.dat) on dm-2
[ 1911.568000] firefox-bin(6521): dirtied inode 18826308 (history.dat) on dm-2
[ 1920.212000] firefox-bin(6521): dirtied inode 18829523 (prefs-1.js) on dm-2
[ 1920.216000] firefox-bin(6521): dirtied inode 18827110 (?) on dm-2
[ 1923.632000] firefox-bin(6521): dirtied inode 18827110 (localstore-1.rdf) on dm-2
[ 1923.636000] firefox-bin(6521): dirtied inode 18829504 (?) on dm-2
[ 1933.100000] firefox-bin(6521): dirtied inode 18829504 (sessionstore-1.js) on dm-2
[ 1933.852000] firefox-bin(6521): dirtied inode 19927161 (_CACHE_002_) on dm-2
[ 1933.852000] firefox-bin(6521): dirtied inode 19927161 (_CACHE_002_) on dm-2
[ 1933.896000] firefox-bin(6521): dirtied inode 19927165 (_CACHE_003_) on dm-2
[ 1933.896000] firefox-bin(6521): dirtied inode 19927165 (_CACHE_003_) on dm-2
[ 1934.308000] firefox-bin(6521): READ block 404671336 on dm-2
[ 1934.332000] firefox-bin(6521): READ block 404671432 on dm-2
[ 1934.332000] firefox-bin(6521): READ block 404671880 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671368 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671376 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671384 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671392 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671400 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671408 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671416 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671424 on dm-2
[ 1934.340000] firefox-bin(6521): READ block 404671440 on dm-2
[ 1934.344000] firefox-bin(6521): READ block 404671680 on dm-2
Each time firefox goes to a new website firefox accesses the disk. IMHO cache/cookies/history/session-stuff all needs to be stored in ram instead of on the disk and should only be stored to the disk once in a while (10 minutes?) and when firefox closes.

firefox might cause unnecessary disk activity. It is important for laptop users to reduce unnecessary disk-activity because the harddrive head might be parked or the drive might be spun down.

This might be one of the contributors to the famous Load_Cycle_Count bug :
https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/17216
https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/59695

Aggressive power management will cause your laptop’s harddrive head to park quickly. Too much unnecessary disk activity and usefull disk activity such as ext3 journalling (which is safer for your data) will unpark your harddrive head quickly. This combination of aggressive power management and disk activity is causing too rapidly increasing Load_Cycle_Counts for some people.

READ THIS FIRST :
http://ubuntuforums.org/showpost.php…4&postcount=25
http://ubuntudemon.wordpress.com/200…er-management/
http://www.advogato.org/person/mjg59/diary/82.html
http://ubuntuforums.org/showpost.php…&postcount=381
http://ubuntuforums.org/showpost.php…&postcount=426

And i hope ubuntu team will look after these bugs….

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