[ubuntu-za] Changing filesystems

Morgan Collett morgan at ubuntu.com
Fri Feb 26 12:56:10 GMT 2010


On Fri, Feb 26, 2010 at 14:34, Hannes Coetzee
<scorpking at scorpking.za.org> wrote:
> On 26/02/2010 14:06, Josh Brodrick wrote:
>> Hi All
>>
>> Sorry if this is a bit of a random question, but does anyone know a
>> way i can change  my filesystem from ext4 to ext2 (yip go backwards
>> :). The reason im asking is i have a netbook with ubuntu NBR installed
>> but with ext4. The netbook has a solid state drive (SSD) installed and
>> since my original install have been made aware that i should rather
>> have used ext2 (non journalling FS) to reduce wear on my SSD.
>>
>> Is there anyway i can convert to ext2 without having to do a fresh
>> install...and is it worth it??
>> Otherwise can i turn journalling of ext4?
>>
>> Thanks, cheers
>>
>> Josh
> Does ext4 not have better support for SSD to reduce wear? I remember
> reading something like that somewhere.

Ted T'so finds ext4 to be OK for SSD if you use noatime, and also
shows using ext4 without a journal:
http://thunk.org/tytso/blog/2009/03/01/ssds-journaling-and-noatimerelatime/

There are tips for moving your log files to tmpfsen:
http://ubuntuforums.org/showthread.php?t=1178209

Regards
Morgan



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