> > still doesnt work properly for the aladdin 5 pci ide chipset, as i can't
> > mount cdroms. mounting cdroms on stock 2.2.1 works.
>
> This tells you that DMA is not functional with the CDROM.
> Recompile with my patch and skip 'CONFIG_IDEDMA_AUTO' option.
>
> Add/Create to the append line of your /etc/lilo.conf
> append="ide0=dma"
>
> This will allow for the hard drives on ide0 to get DMA access while
> forcing ide1 to revert to PIO access.
>
> One can not easily make ALI play nicely with anything but HD's.
> All other ATAPI devices that report as possible DMA capable will cause
> errors.
Shaw,
The above is the correct method for handling ATAPI devices that report
errors. I suggest that you split the HD and CDROM to maintain the
stablity of DMA xfers. This is part of the problematic nature of the ALI
IV/V chipset based boards and Linux. This code was developed independent
of me, but tested enough to state that it is functional in most cases.
Until I get around to getting one of these to shake down hard and torture,
one will be required to patch until, or 2.3.X begins.
On Thu, 4 Feb 1999, Shaw Carruthers wrote:
>
>
> I have an Asus P5A with Aladdin chipset and although my CDROM works ok, I
> am seeing:
>
> Feb 4 01:41:13 shawc kernel: hdb: lost interrupt
The point is that this should not happen.
> Feb 4 01:41:13 shawc kernel: hdb: cdrom_decode_status: status=0xd0 { Busy }
> Feb 4 01:41:13 shawc kernel: hdb: DMA disabled
> Feb 4 01:41:13 shawc kernel: hdb: ATAPI reset complete
> Feb 4 01:41:14 shawc kernel: ATAPI device hdb:
> Feb 4 01:41:14 shawc kernel: Error: Unit attention -- (Sense key=0x06)
> Feb 4 01:41:14 shawc kernel: Power on, reset or bus device reset occurred -- (asc=0x29, ascq=0x00)
> Feb 4 01:41:14 shawc kernel: ATAPI device hdb:
> Feb 4 01:41:14 shawc kernel: Error: Unit attention -- (Sense key=0x06)
> Feb 4 01:41:14 shawc kernel: Not ready to ready transition, medium may have changed -- (asc=0x28, ascq=0x00)
> ide0: BM-DMA at 0xa400-0xa407, BIOS settings: hda:DMA, hdb:pio
>
>
> hdb: FX320S, ATAPI CDROM drive
> hdb: ATAPI 32X CD-ROM drive, 256kB Cache
>
> --
> Shaw Carruthers - shaw@shawc.demon.co.uk
> London SW14 7JW UK
> This is not a sig( with homage to Magritte).
>
>
>
> -
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>
Cheers,
Andre Hedrick
The (NEW) Linux IDE guy
http://www.dyer.vanderbilt.edu/server/udma/
You just need a bigger hammer, or learn how to swing the one you have better.
(C) me.....
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