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Re: Hard disk write cache?



On Wed, Nov 14, 2001 at 01:44:19PM +0000, Stephen C. Tweedie wrote:
> On Wed, Nov 14, 2001 at 11:49:06AM +0100, Martin Eriksson wrote:
> 
> > So basically my question is; do I loose all benefits of ext3 if I turn on
> > the hard disk write cache?
> 
> You lose the guarantees, yes.  I've been talking with Andre Hedrik
> about the possibility of doing cache forcing on ide, but even then,
> disks lie about when the data is completely on disk, so it's not clear
> just how much you lose by having the write caching turned on.

That appears to be true if power is lost, but will the disk cache
eventually be flushed if power is not interrupted, e.g., when
hitting the reset button after a deadlock (during kernel development,
of course. :-)) ?

Regards,

   Bill Rugolsky





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