Re: Newbie: How do I defrag my drive?

From: kamaraju kusumanchi (raju.mailinglists_at_gmail.com)
Date: 08/24/05

  • Next message: Jamin W. Collins: "Re: root (/) on software raid" 
    Date: Tue, 23 Aug 2005 22:19:55 -0400
To: debian-user@lists.debian.org

    Tim Ruehsen wrote:

    >>You don't need to. You only need to defragment your disk if your
    >>operating system is incapable of keeping the fragmentation under
    >>control, and Linux does not suffer from this problem.
    >>
    >>
    >
    >Many people say so, but it is not true.
    >
    >Ext2 takes some precautions to reduce fragmentation a bit (in comparison with
    >(V)FAT), but ext2 can't prevent it. And it is not a feature of 'Linux' it is
    >a feature of the filesystem.
    >
    >Jiann-Ming Su posted a link, which talks about two possibilities to defragment
    >your discs: either use defrag (but make a backup before!) or just make a
    >backup, clean your partitions and restore the backup.
    >
    >I did the last thing (after using my system for ~2 years for ~10 hours a day,
    >making updates every day) and my system booted about 30% faster. Now, after a
    >year or so, it seems to be time to do it again (booting became slower and
    >slower).
    >
    >Regards, Tim
    >
    >
    Tim,
       I am a bit startled about the increase in 'boot time performance'
    once you defragmented. Could it be that you have your drives filled up
    to a very high value (say more than 95%)? If you dont mind could you
    post your df -h output? I have a feeling that defragmenting an ext2/ext3
    partition does not increase performance if the partitions are not
    heavily filled up. But I could be wrong.

    raju 

    -- 
Kamaraju S Kusumanchi
Graduate Student, MAE
Cornell University
http://www.people.cornell.edu/pages/kk288/
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