Re: [PATCH] barrier patch set

[Jeff Garzik]

Chris Wedgwood wrote:
> > For IDE, O_DIRECT and O_SYNC can use special "FUA" commands, which
> > don't return until the data is on the platter.
>
>
> On modern drives how reliable is this?  At one point disk-scrubbing
> software which used FUA (to ensure data was being written to the
> platters) showed that some drives completely ignore this.

I'm suspicious of this, because of Bart's point...   I haven't seen any 
PATA disks that did FUA, so it sounds like broken software.

	Jeff



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