Date: Mon, 24 Mar 2003 12:20:02 -0800 From: "Scott R." <fluid@sfmidimafia.com> To: BelletJr@aol.com Cc: current@FreeBSD.ORG Subject: Re: "READ_BIG command timeout" on CDROM drive Message-ID: <3E7F6872.1050809@sfmidimafia.com> References: <28.358293be.2bade7c4@aol.com>
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BelletJr@aol.com wrote: > Hi all! > > When I read cdroms with fbsd 5.0, the following message appears in the > console very often (it seems to happen with every cdrom I try): > >>acd0: READ_BIG command timeout - resetting >>ata0: resetting devices .. >>done > > > It is repeated indefinitely and I can't kill -9 the process that is trying to > read the cdrom. > "umount -f /cdrom" also gets stuck and doesn't write any error messages. > > The driver in use is cd9660: RockRidge Extension. > > I have to reboot to have access to the cdrom drive again. And besides, the > shutdown process does not end every time when the system is in this state. > > Is there a means to have access to the cdrom drive again without rebooting? > I have not seen any bug report for this problem; am I right? Just wanted to report that I fixed this problem by adding: hw.ata.atapi_dma="1" # Run the CD-ROM/DVD in DMA mode to /boot/loader.conf. The system was trying to access the drive using PIO4 rather than DMA and crapping out. I got the idea from another thread today with the subject "playing mp3's and burning a cd". Just an FYI. -Scott To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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