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    SubjectQuestion about DMA and cd burning.
    I was talking to a couple of friends who also run 2.4.x, they said they 
    burn CD's all the time using DMA, and not PIO.

    So I looked into the matter, apparently, the kernel sets my hd{b,c}
    (both Plextor 12/10/32A's) drives DMA to disabled.

    [war@war war]$ dmesg | grep -i dma
    Activating ISA DMA hang workarounds.
    VP_IDE: VIA vt82c596b (rev 12) IDE UDMA66 controller on pci00:07.1
    ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio
    hda: 156301488 sectors (80026 MB) w/2048KiB Cache, CHS=9729/255/63, UDMA(66)
    hdb: DMA disabled
    hdc: DMA disabled
    [war@war war]$

    [war@war war]$ lspci
    00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo
    PRO133x] (rev 44)
    00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo
    MVP3/Pro133x AGP]
    00:07.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Mobile South]
    (rev 12)
    00:07.1 IDE interface: VIA Technologies, Inc. VT82C586/B/686A/B PIPC Bus
    Master IDE (rev 06)
    00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 08)
    00:07.3 Host bridge: VIA Technologies, Inc. VT82C596 Power Management
    (rev 20)
    00:10.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
    00:10.1 Input device controller: Creative Labs SB Live! MIDI/Game Port
    (rev 07)
    00:11.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone]
    (rev 30)
    00:12.0 SCSI storage controller: Adaptec AHA-7850 (rev 03)
    01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 01)
    [war@war war]$

    I even went further and tried:

    append="ide-cd=ignore=hdb ide-cd=ignore=hdc"

    In my lilo.conf, once again, no luck.

    Can anyone offer any suggestions why others can burn CD's in DMA mode,
    yet the kernel keeps disabling DMA for my burners?

    Please cc me as I am not subscribed to the list, thank you.


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