Date: Fri, 30 Mar 2001 14:50:53 -0600 (CST) From: David Scheidt <dscheidt@tumbolia.com> To: Wayne Pascoe <wayne.pascoe@realtime.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: SCSI Cd-writer Message-ID: <Pine.BSF.4.21.0103301438390.67749-100000@shell-3.enteract.com> In-Reply-To: <m1puez6lir.fsf@zaphod.realtime.co.uk>
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On 30 Mar 2001, Wayne Pascoe wrote: :Well, I fixed the problem, or so I thought. I bought an HP 9600 SCSI :writer and an Adaptec 2930U controller. : :Installed fine, cdrecord --scanbus shows the device at 0,0,0 (which is :fine since the device is at id 0). : :First burn created a coaster. Second burn succeeded. But at the end it :said :min full 37% :which sounds DANGEROUSLY close to a buffer underrun. : :Is there anything that I can do to stop making coasters? Did I buy a :lemon? :( cdrecord has an fs=# option, which lets you set the size of the ring buffer it uses for the writer process. The default is 4MB, try increasing it to 8MB (fs=8m ). As long as cdrecord says that the fifo is 0 times empty, you should be okay. If you need a buffer bigger than 10 or 12 MB, there's something wrong -- quite possibly that your disks can't keep up. If you're piping the output of mkisofs to cdrecord, try using a file instead. Failing that, reduce the speed you try and burn at. David Scheidt -- dscheidt@tumbolia.com Bipedalism is only a fad. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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