Re: UDMA/DMA not working for me in 2.4.0-test1-ac6

From: Andre Hedrick (andre@linux-ide.org)
Date: Wed May 31 2000 - 13:58:47 EST


Thank you for the reported update..........

Cheers,

On Wed, 31 May 2000, Thomas Molina wrote:

> On Wed, 31 May 2000, Andre Hedrick wrote:
>
> >
> > Does it perform correctly?
> >
> > > Bottom line: Thanks. The fix works and UDMA configures correctly.
>
> Define correctly. I don't receive any suspicious messages in the
> log, there is no obvious data/file corruption that I can tell, and
> hdparm now reports DMA as on, and reports the following statistics:
>
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 2.56 seconds =50.00 MB/sec
> Timing buffered disk reads: 64 MB in 8.44 seconds = 7.58 MB/sec
> [root@wr5z /root]# hdparm -tT /dev/hdb
>
> /dev/hdb:
> Timing buffer-cache reads: 128 MB in 2.54 seconds =50.39 MB/sec
> Timing buffered disk reads: 64 MB in 6.43 seconds = 9.95 MB/sec
>
> Relevant dmesg extract:
>
> 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
> VT 82C597 Apollo VP3
> Chipset Core ATA-33
> Split FIFO Configuration: 8 Primary buffers, threshold = 1/2
> 8 Second. buffers, threshold = 1/2
> ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:DMA
> ide0: VIA Bus-Master (U)DMA Timing Config Success
> ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:DMA, hdd:DMA
> ide1: VIA Bus-Master (U)DMA Timing Config Success
> hda: Maxtor 92041U4, ATA DISK drive
> hdb: SAMSUNG VG34323A (4.32GB), ATA DISK drive
> hdc: 40X CD-ROM, ATAPI CDROM drive
> hdd: PHILIPS CDD3610 CD-R/RW, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: 40020624 sectors (20491 MB) w/512KiB Cache, CHS=2491/255/63,
> UDMA(33)
> hdb: 8446032 sectors (4324 MB) w/496KiB Cache, CHS=525/255/63, UDMA(33)
> Partition check:
> hda: hda1 hda2 hda3 < hda5 hda6 hda7 hda8 hda9 >
> hdb: hdb1 < hdb5 hdb6 hdb7 >
>
> Beyond that, I'm not sure what to look for. Are there any other
> tests/statistics I should get?
>

Andre Hedrick
The Linux ATA/IDE guy

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