Date: Fri, 16 Jan 2004 09:33:57 +0100 (CET) From: "Roman Kennke" <roman@interview-machine.com> To: <freebsd-questions@freebsd.org> Subject: DMA problem with DVD drive Message-ID: <49183.217.187.89.107.1074242037.squirrel@interview-machine.com>
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Hi there, I am not able to enable DMA for my DVD drive. When I issue 'atacontrol mode 1 UDMA100 XXX' and access the drive, first the drive access hangs, and after a view seconds the machine locks up completely. This also hold true for all other DMA modes. I am running FreeBSD 5.2 on a Fujitsu-Siemens Amilo A Notebook. I would send more info about the ATA/IDE controller, and the error messages but I don't know, how to get to this info. BTW: I know that DMA works for this drive. I have got it working at least with linux 2.4.22, althought I also had alot of DMA problems with other versions, so I suspect the hardware (controller) is flakey. Any help is appreciated. Here follows some output from dmesg: moonlight# dmesg | grep ata atapci0: <AcerLabs Aladdin UDMA100 controller> port 0xa000-0xa00f at device 4.0 on pci0ata0: at 0x1f0 irq 14 on atapci0 ata0: [MPSAFE] ata1: at 0x170 irq 15 on atapci0 ata1: [MPSAFE] ad0: 28615MB <FUJITSU MHR2030AT> [58140/16/63] at ata0-master UDMA100 acd0: CDRW <TOSHIBA DVD-ROM SD-R2212> at ata1-master PIO4 Ciao, Roman -- SOAP for Python http://interview-machine.com/soap/
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