Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261256AbVEPDIN (ORCPT ); Sun, 15 May 2005 23:08:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261257AbVEPDIN (ORCPT ); Sun, 15 May 2005 23:08:13 -0400 Received: from vms048pub.verizon.net ([206.46.252.48]:65494 "EHLO vms048pub.verizon.net") by vger.kernel.org with ESMTP id S261256AbVEPDIG (ORCPT ); Sun, 15 May 2005 23:08:06 -0400 Date: Sun, 15 May 2005 23:08:04 -0400 From: Gene Heskett Subject: Re: Disk write cache (Was: Hyper-Threading Vulnerability) In-reply-to: <42880620.8000300@rtr.ca> To: linux-kernel@vger.kernel.org Message-id: <200505152308.04960.gene.heskett@verizon.net> Organization: None, usuallly detectable by casual observers MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Content-disposition: inline References: <1115963481.1723.3.camel@alderaan.trey.hu> <200505152156.18194.gene.heskett@verizon.net> <42880620.8000300@rtr.ca> User-Agent: KMail/1.7 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1227 Lines: 30 On Sunday 15 May 2005 22:32, Mark Lord wrote: > >took place on another list, and wrote a test gizmo that copied a > >large file, then slept for 1 second and issued a sync command. No > >drive led activity until the usual 5 second delay of the > > filesystem had expired. To me, that indicated that the sync > > command was being > >There's your clue. The drive LEDs normally reflect activity >over the ATA bus (the cable!). If they're not on, then the drive >isn't receiving data/commands from the host. > >Cheers That was my theory too Mark, but Jeff G. says its not a valid indicator. So who's right? -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 99.34% setiathome rank, not too shabby for a WV hillbilly Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2005 by Maurice Eugene Heskett, all rights reserved. - 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/