Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261498AbVEQNQq (ORCPT ); Tue, 17 May 2005 09:16:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261505AbVEQNQq (ORCPT ); Tue, 17 May 2005 09:16:46 -0400 Received: from mail.tmr.com ([64.65.253.246]:6415 "EHLO gatekeeper.tmr.com") by vger.kernel.org with ESMTP id S261498AbVEQNQi (ORCPT ); Tue, 17 May 2005 09:16:38 -0400 Date: Tue, 17 May 2005 09:15:52 -0400 (EDT) From: Bill Davidsen To: Alan Cox cc: Matthias Andree , Linux Kernel Mailing List Subject: Re: Disk write cache (Was: Hyper-Threading Vulnerability) In-Reply-To: <1116255270.21358.43.camel@localhost.localdomain> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1166 Lines: 28 On Mon, 16 May 2005, Alan Cox wrote: > > flashes its cache to NVRAM, or uses rotational energy to save its cache > > on the platters, please name brand and model and where I can download > > the material that documents this behavior. > > I am not aware of any IDE drive with these properties. I'm not sure I know of a SCSI drive which does that, either. It was a big thing a few decades to use rotational energy to park the heads, but I haven't seen discussion of save to nvram. Then again, I haven't been looking for it. What would be ideal is some cache which didn't depend on power to maintain state, like core (remember core?) or the bubble memory which spent almost a decade being just slightly too {slow,costly} to replace disk. There doesn't seem to be a cost effective technology yet. -- bill davidsen CTO, TMR Associates, Inc Doing interesting things with little computers since 1979. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/