On Sat, 14 Jul 2001, Thomas Molina wrote:
> On Sat, 14 Jul 2001, Mike A. Harris wrote:
>
> > You also need a UDMA 100 cable that is <= 18 inches. In your
> > case you have a VIA chipset so don't worry about it, you won't
> > get UDMA 100 anyway as it is buggy, and even if you do get it
> > configured for UDMA 100, you won't get any speed increase.
> > You're more likely to fry the disk trying or at least get massive
> > filesystem corruption.
> >
> > >2) why i receive the error message (D) ?
> >
> > Because VIA chipsets are buggy as hell. Go to google.com and
> > type in "via chipset bug" and you'll have 100 days worth of
> > reading. ;o)
>
> So what about this (?):
>
> PDC20265: chipset revision 2
> PDC20265: not 100% native mode: will probe irqs later
> PDC20265: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.
> ide2: BM-DMA at 0x8000-0x8007, BIOS settings: hde:DMA, hdf:DMA
> ide3: BM-DMA at 0x8008-0x800f, BIOS settings: hdg:pio, hdh:pio
> hda: CRD-8520B, ATAPI CD/DVD-ROM drive
> hdb: LG CD-RW CED-8080B, ATAPI CD/DVD-ROM drive
> hde: WDC WD300BB-00AUA1, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide2 at 0x9400-0x9407,0x9002 on irq 11
> hde: 58633344 sectors (30020 MB) w/2048KiB Cache, CHS=58168/16/63,
> UDMA(100)
> Partition check:
> hde: [PTBL] [3649/255/63] hde1 hde2 < hde5 hde6 hde7 hde8 hde9 hde10 >
>
> and this:
>
> [root@localhost /root]# hdparm -tT /dev/hde
>
> /dev/hde:
> Timing buffer-cache reads: 128 MB in 0.66 seconds =193.94 MB/sec
> Timing buffered disk reads: 64 MB in 2.17 seconds = 29.49 MB/sec
You appear to have a Promise controller, not a VIA. I however do have a
VIA (and have bumped it up a bit with 'linux ide0=ata66' and 'hdparm
A1a128c1d1m16X69u1 /dev/hda') :
Uniform Multi-Platform E-IDE driver Revision: 6.31
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
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
VP_IDE: ATA-66/100 forced bit set (WARNING)!!
ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:DMA
hda: ST340823A, ATA DISK drive
hdc: DVD-ROM DDU220E, ATAPI CD/DVD-ROM drive
hdd: Hewlett-Packard CD-Writer Plus 9500, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 78165360 sectors (40021 MB) w/512KiB Cache, CHS=4865/255/63,
UDMA(100)
hdc: ATAPI DVD-ROM drive, 512kB Cache, DMA
[root@beta root]# hdparm -vtT /dev/hda
/dev/hda:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 128 (on)
geometry = 4865/255/63, sectors = 78165360, start = 0
Timing buffer-cache reads: 128 MB in 0.70 seconds =182.86 MB/sec
Timing buffered disk reads: 64 MB in 2.15 seconds = 29.77 MB/sec
NOTE: while the hdparm command I use works for me (after long testing and
a lot of reinstalls) it may cause your system damage so nobody come crying
to me if it wipes your system.
--
Chris Kloiber, RHCE
Enterprise Support - Red Hat, Inc.
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