Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 22 Mar 2001 05:27:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 22 Mar 2001 05:27:40 -0500 Received: from munk.apl.washington.edu ([128.95.96.184]:29958 "EHLO munk.apl.washington.edu") by vger.kernel.org with ESMTP id ; Thu, 22 Mar 2001 05:27:21 -0500 Date: Thu, 22 Mar 2001 02:23:10 -0800 (PST) From: Brian Dushaw To: William Park cc: Subject: Re: VIA vt82c686b and UDMA(100) In-Reply-To: <20010322010507.A3170@better.net> 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 No luck with either William's or Agus's suggestions. Still 11 MB/s transfer rate, dma enabled or not. The motherboard is a newer IWILL. dmesg outputs: Uniform Multi-Platform E-IDE driver Revision: 6.30 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: IDE controller on PCI bus 00 dev 39 VP_IDE: chipset revision 6 VP_IDE: not 100% native mode: will probe irqs later ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1 ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio hda: WDC WD300BB-00AUA1, ATA DISK drive hdc: Hewlett-Packard CD-Writer Plus 9100b, ATAPI CDROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 hda: WDC WD300BB-00AUA1, 28629MB w/2048kB Cache, CHS=3649/255/63, UDMA(100) hdparm -i /dev/hda outputs: Model=WDC WD300BB-00AUA1, FwRev=18.20D18, SerialNo=WD-WMA6R3063544 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq } RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40 BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16, MultSect=off DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=58633344 tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2 IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 mode2 mode3 mode4 *mode5 hdparm -t /dev/hda outputs: /dev/hda: Timing buffered disk reads: 64 MB in 5.66 seconds = 11.31 MB/sec [sigh...] I suppose it could be the Western Digital disk - I seem to recall that linux has a difficult history with WD (a comment that may merely start an unfounded rumour...) B.D. On Thu, 22 Mar 2001, William Park wrote: > On Wed, Mar 21, 2001 at 08:40:21PM -0800, Brian Dushaw wrote: > > Dear Linux Kernel Wisemen, > > I have been following the discussion of the VIA vt82c686b chipset > > and the troubles people have had in getting UDMA(100) to work. This > > is to report that I have now tried the 2.4.2-ac20 kernel and the > > 2.2.18 kernel with Andre's patch (dated March 20) and neither of > > them get the disk speed up to where it ought to be. hdparm -t reports > > back 11 MB/s or so for either kernel. > > VIA82CXXX enabled, and I also tried the ide0=ata66 flag, in desparation. > > At boot up both kernels report the disk as UDMA(100) - everything > > seems to be peachy keen, but for the sluggish disk performance. > > > > Merely a report from the front lines, > > Try 'hdparm -d1 -t', and see what you get. > > :wq --William Park, Open Geometry Consulting, Linux/Python, 8 CPUs. > -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Brian Dushaw Applied Physics Laboratory University of Washington 1013 N.E. 40th Street Seattle, WA 98105-6698 (206) 685-4198 (206) 543-1300 (206) 543-6785 (fax) dushaw@apl.washington.edu Web Page: http://staff.washington.edu/dushaw/index.html - 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/