IDE write ordering ?

David Balazic david.balazic at hermes.si
Tue Dec 2 09:02:32 UTC 2003


> On Mon, Dec 01, 2003 at 09:33:17AM +0100, David Balazic wrote:
> > But isn't the default on the majority of ATA drives to have write cache
> > enabled ?
> 
> Yes. 
> 
> > is very informative.
> > So my question is , how can one test if the journalled FS on his disk is
> > actually working
> > as it should or is it just waste of time and giving a false sense of
> safety
> 
> Its extremely hard to do because you need fairly complex tools to ensure
> outstanding I/O during a sudden power off and out of order drive writeback
> etc
> 
Is write caching turned of in case of journalled filesystems ?
Or is that left as an exercise to the  reader ?

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