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Re: IDE write cache and journaling file systems

To: Simon Matter <simon.matter@xxxxxxxxxxxxxxxx>
Subject: Re: IDE write cache and journaling file systems
From: "Mark M. Barrios" <sleep@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 19 Apr 2002 23:35:55 +0800 (PHT)
Cc: Jim Buzbee <James.Buzbee@xxxxxxxxxxxx>, XFS List <linux-xfs@xxxxxxxxxxx>
In-reply-to: <3CBFB9D3.831D2C98@ch.sauter-bc.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
On Fri, 19 Apr 2002, Simon Matter wrote:
 
> Jim,
> 
> It's obvious that lifetime is reduced with write caching off. Just
> listen to the drive and compare between w/cache on / off. What helps
> here is that Linux uses memory for caching effectively.
> 
> Some weeks ago I brought an issue to this list. I got zero filled files
> after _clean_ reboots and I thought it was the write cache of the IDE
> drives not flushing correctly. In fact I got bitten by the 'remount
> readonly bug' and it had nothing to do with the write chache being
> turned on.

about a week after migrating my RH 7.2 desktop box to XFS, I started 
loosing setting in GNOME 1.4 and I also lost all of my bookmarks in 
mozilla 0.9.9, I did test XFS with a simulated powerfailure just to see if 
everything works and it went well.

today I had a real powerfailure and after the box was back up again I lost 
all of the settings in GNOME, everything went back to its default 
settings, I cant say if the config files were corupted or had 0 sizes.

is this because these applications are not compatible with XFS? or 
because of my hardware? or is this a needed feature/bug fix not yet in XFS 
code?

is there a work around to this? please share or its back to ext3 for me.

im running kernel linux-2.4.18-xfs-20020418 from CVS and the tools from 
that tree also.

Thanks,
Mark M. Barrios


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