[svlug] Filesystems for laptops

Karsten M. Self kmself at ix.netcom.com
Sun Jan 12 02:48:43 PST 2003

on Sun, Jan 12, 2003 at 11:59:17AM +0200, Ira Abramov (lists-svlug at ira.abramov.org) wrote:
> I nstalled a new laptop with Debian Sid. asking a friend of mine which
> FS to use that will write less to the disk he told me Reiser is known to
> do all sorts of random background commits and background rearrangements
> at idle times, 

True AFAIK.  I run reiser/ext3 on my laptops, and note this activity.
Then again, I'm almost always on wall current, so it's not a major

> so I opted for EXT3, however ext3 seems to have a 5 second commit
> interval and "pings" the disk every 5 seconds even if there is
> absolutely nothing to commit (running at level 1 for instance).  I
> know it's the ex3 code because it stopped once I remounted the root
> read-only at level 1.

This is tuneable, I believe.  Google may help.

> in other words - it will never let the disk spin down. Any
> recommendations to solve this with ext3 without reformating the disk
> to reiser?  would reiser even solve the problem? or is my only
> solution to give up the journal and mount it ext2?

I believe one of the other journaling filesystems -- either XFS or JFS
-- explicitly makes the laptop configuration issue a lot easier.  If you
don't mind shuffling your data around a bit, repartitioning may help.
Note too if you have multiple partitions, you're going to have to make
them all behave uniformly if you want your disk to spin down.


Karsten M. Self <kmself at ix.netcom.com>        http://kmself.home.netcom.com/
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