Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261409AbUKFPvm (ORCPT ); Sat, 6 Nov 2004 10:51:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261411AbUKFPvm (ORCPT ); Sat, 6 Nov 2004 10:51:42 -0500 Received: from main.gmane.org ([80.91.229.2]:64167 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S261409AbUKFPv0 (ORCPT ); Sat, 6 Nov 2004 10:51:26 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Kalin KOZHUHAROV Subject: WDC TLER (Time Limited Error Recovery) and linux kernel Date: Sun, 07 Nov 2004 00:51:43 +0900 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: j110113.ppp.asahi-net.or.jp User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20041016 X-Accept-Language: bg, en, ja, ru, de X-Enigmail-Version: 0.86.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1314 Lines: 31 Hello, I was just browsing Western Digital's site and was looking at the new RAID edition SATA drives... As I saw the followind note: ## IMPORTANT: Because of the time-limited error recovery feature, this product is intended for server applications and is not recommended for use in desktop systems. ## So I was wondering what exactly is it and how is software RAID affaceted by it... For a quick overview of TLER: http://www.excelmeridiandata.com/products/wd_raid_edition_drive.shtml The "official" WDC info is here: http://www.wdc.com/en/library/sata/2579-001098.pdf You'll see that WDC talks about 8-second timeout by the host (RAID) adapter, but there is no such specification. Where did this 8s came from? How is it implemented in software RAID? (haven't looked the source yet) In other words is there any benefits or problems using TLER-enabled disks under linux (with software RAID)? Anybody tired them? Just some questions that came into my mind... Kalin. -- || ~~~~~~~~~~~~~~~~~~~~~~ || ( ) http://ThinRope.net/ ( ) || ______________________ || - 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/