Subject: Re: ide write-caching?
To: Giles Lean <giles@nemeton.com.au>
From: Manuel Bouyer <bouyer@antioche.lip6.fr>
List: port-i386
Date: 02/13/2002 11:00:56
On Wed, Feb 13, 2002 at 07:48:51AM +1100, Giles Lean wrote:
> 
> > Is ide write-caching supported in NetBSD? Just wondering.
> > Rob Becker
> 
> On disk caches are a feature of the disk drive, so are supported by
> default an all operating systems.
> 
> If you are asking can NetBSD configure the cache on IDE drives
> (e.g. from write back to write through if the drive supports it) then
> I the answer is "no" -- this seems to take vendor specific utilities
> such as IBM provide from http://www.storage.ibm.com.

Not really true, there are standart IDE commands for this. It's just that
nobody worked on this yet for NetBSD, it's on my todo list.

I think that write-back caches are enabled by default on most IDE disks.

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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