Re: [PATCH] barrier patch set

From: Jeff Garzik
Date: Tue Mar 30 2004 - 17:45:17 EST

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.


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