Re: scsi vs ide performance on fsync's

Gregory Maxwell
2001-03-06T17:47:22Z

On Tue, Mar 06, 2001 at 06:14:15PM +0100, David Balazic wrote:
[snip]
> Hardware Level caching is only good for OSes which have broken
> drivers and broken caching (like plain old DOS).
>
> Linux does a good job in caching and cache control at software
> level.

Read caching, yes. But for writes, the drive can often do a lot more
optimization because of it's synchronous operation with the platter and
greater knowledge of internal disk geometry.

What would be useful, as Alan said, is a barrier operation.