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SubjectDMA fails for large hard drive on an ICH5 controller

I'm getting DMA timeouts in 2.6.3 (and also with SuSE's version of
2.4.21-smp) whenever I try to enable DMA on my hard disk, whether
during boot or later via hdparm:


hda: dma_timer_expiry: dma status == 0x21
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x21
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x21
hda: timeout waiting for DMA
hda: timeout waiting for DMA
hda: (__ide_dma_test_irq) called while not waiting
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }

hda: drive not ready for command


The mainboard is an MSI 865PE Neo2 FIS2R (the chipset is an MS-6728,
with the ICH5 IDE controller). The hard drive is a Samsung SV1604N
(160GB). Both the hard drive and the controller are known-good -- I
can enable DMA on the other channels, and in fact on the same channel
with other, older hard drives, just not with this new one. (I don't
have another 160GB disk to test against.)

I've heard of other people using the same controller with large drives
without problems, but also a few with the same problem. I have fiddled
with a few kernel options, among them

CONFIG_BLK_DEV_GENERIC
CONFIG_BLK_DEV_IDEDMA_PCI
CONFIG_IDEDMA_PCI_AUTO
CONFIG_BLK_DEV_PIIX
CONFIG_X86_IO_APIC

without success. What should I try next?

--
Kilian Foth Phone +49 40 42883-2518
AB NATS, FB Informatik Fax +49 40 42883-2515
Universität Hamburg
Vogt-Kölln-Str. 30
22527 Hamburg
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