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SubjectRe: VIA 82C586 IDE / UDMA problems
On Tue, 13 Oct 1998, Evgeny Zemlerub wrote:

> After installing and configuring 2.1.125 ( skipped 123,124,125)
> and enabeling UDMA and VIA82C586 IDE chipset support
>
> getteing in the boot and during work ( in varios combinations):
>
> hda: dma_intr: status=0x53 { DriveReady SeekComplete Index Error }
> hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hda: dma_intr: error=0x84 { DriveStatusError BadCRC }

Cable is greater than 20 inches (standard of UDMA support is 18 inches),
this is the upper limit that I have made imperical tests with to test the
18 inch rule.

For a simple test, call "hdparm -X34 /dev/hda" and put the drive into
DMA mode 2, after booting. Do some work and you should not see these
errors. Then call "hdparm -X66 /dev/hda" and put the drive into
UDMA mode 2, and then the errors should return, if it is a cable length
problem.

> hda: DMA disabled
> hdb: DMA disabled
> ide0: reset: success
>
>
> i do have VIA82C586 IDE :
> IDE interface: VIA Technologies VT 82C586 Apollo IDE (rev 6).
> Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
> I/O at 0xf000 [0xf001].
>
> and UDMA hard disk :
>
> VP_IDE: IDE controller on PCI bus 00 dev 39
> VP_IDE: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
> ide0: VIA Bus-Master (U)DMA Timing Config Success
> hda: QUANTUM FIREBALL ST6.4A, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: QUANTUM FIREBALL ST6.4A, 6149MB w/81kB Cache, CHS=784/255/63, UDMA
>
> Evgeny
>

Cheers,
Andre Hedrick
The IDE-FNG for Linux
The APC UPS Specialist for Linux

http://www.dyer.vanderbilt.edu/server/udma/
http://www.dyer.vanderbilt.edu/server/apcupsd/



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