[ltp] A21m won't park /dev/hda

[Tino Keitel]

On Wednesday, 14. November 2001 20:02, Tod Harter wrote:
> On Tuesday 13 November 2001 18:35, you wrote:
> > On Tuesday, 13. November 2001 23:02, Tom Allison wrote:
> > > Tino Keitel wrote:
> > > > Do you use a journaling FS?
> > >
> > > No.  Does it help or hurt?
> >
> > It definitely hurts.
>
> Why? I was thinking about how journaling is implemented and I can't see an
> INHERENT reason why it would result in more frequent writes to disk (though
> its true you do end up writing more data in the long run since the journal
> itself is extra overhead). Not that I doubt the truth of what you say, I'm
> just curious about the whys and wherefors of it all.

Journaling FSs bypass the linux write cache when they sync the journal to 
disk (this happens at least every 30 seconds) so noflushd can't do its job by 
stopping kupdated. The disk will keep spinning. I tried that with reiserFS.

Tino

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