Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 21 Dec 2000 04:56:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 21 Dec 2000 04:56:35 -0500 Received: from vger.timpanogas.org ([207.109.151.240]:20231 "EHLO vger.timpanogas.org") by vger.kernel.org with ESMTP id ; Thu, 21 Dec 2000 04:56:27 -0500 Date: Thu, 21 Dec 2000 04:26:25 -0500 (EST) From: "Mike A. Harris" X-X-Sender: To: "Barry K. Nathan" cc: Julian Anastasov , Robert H?gberg , Andre Hedrick , linux-kernel Subject: Re: Extreme IDE slowdown with 2.2.18 In-Reply-To: <200012210758.XAA07609@pobox.com> Message-ID: X-Unexpected-Header: The Spanish Inquisition Copyright: Copyright 2000 by Mike A. Harris - All rights reserved 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 On Wed, 20 Dec 2000, Barry K. Nathan wrote: >[snip] >> message saying UDMA 3/4/5 is not supported. It also claims the >> MVP3 chipset is UDMA-33 only, whereas all relevant docs I can >> muster including the mobo manual state the board is UDMA-66 >> capable. Mental note to myself: Do not enable WORD93 invalidate. >> ;o) > >I'm somewhat tired and busy, so I'll post URLs without quoting anything >from them (look at the data in *all* of them, and connect the dots, before >you come to any conclusions). Short version of the story: Some MVP3's >support UDMA-66, some don't -- it depends on the southbridge. 596B & 686A >do, others don't. > >http://www.via.com.tw/news/98mvp3nr.htm >http://www.via.com.tw/products/prodmvp3.htm >http://www.via.com.tw/support/faq.htm#ide Thanks for the info! Here is the most relevant portion I found: * Q: Which VIA Chipsets support UDMA 66? A: For UDMA 66 you must first make sure that you're southbridge is either VT82C596B or VT82C686A. You must also have a UDMA 66 capable hard drive and be using an 80 pin cable which enables faster transmission of data. Windows 98 is UDMA 66 enabled, but if you have Win95 you should install our busmaster drivers. Here is my mobo info: 2 root@asdf:~# lspci -v 00:00.0 Host bridge: VIA Technologies, Inc. VT82C598 [Apollo MVP3] (rev 04) Flags: bus master, medium devsel, latency 16 Memory at d8000000 (32-bit, prefetchable) Capabilities: [a0] AGP version 1.0 00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598 [Apollo MVP3 AGP] (prog-if 00 [Normal decode]) Flags: bus master, 66Mhz, medium devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Apollo PRO] (rev 23) Subsystem: VIA Technologies, Inc. VT82C596/A/B PCI to ISA Bridge Flags: bus master, stepping, medium devsel, latency 0 00:07.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo] (rev 10) (prog-if 8a [Master SecP PriP]) Flags: bus master, medium devsel, latency 32 I/O ports at e000 Capabilities: [c0] Power Management version 2 00:07.3 Host bridge: VIA Technologies, Inc.: Unknown device 3050 (rev 30) Flags: medium devsel Clear as mud. Board docs say it does ATA66, so I am assuming it is the VT82C596B model. lspci doesn't appear to know which it is though. The numbers on the chip itself are: VT82C596B ^ Thus indicating from all the info I've collected so far, that my hardware setup according to docs, is ata66. My drive is ATA100 capable so that is no problem. 80 conductor cable... 12Mb/s on drive rated 37Mb/s sustained.. ;o( Without Andre's fine IDE patches I get 5Mb/s... 12M/s is better than 5. Getting 1/2 of the hardware specs rated values would even be nice... I think it is shoddy hardware with made up specs myself.. makes a good sell to people... ;o) ---------------------------------------------------------------------- Mike A. Harris - Linux advocate - Open source advocate This message is copyright 2000, all rights reserved. Views expressed are my own, not necessarily shared by my employer. ---------------------------------------------------------------------- If you're interested in computer security, and want to stay on top of the latest security exploits, and other information, visit: http://www.securityfocus.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/