From owner-freebsd-hackers Mon Nov 27 10:04:18 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id KAA17178 for hackers-outgoing; Mon, 27 Nov 1995 10:04:18 -0800 Received: from tcsi.tcs.com (tcsi.tcs.com [137.134.41.11]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id KAA17171 for ; Mon, 27 Nov 1995 10:04:08 -0800 Received: from phact.tcs.com (phact.tcs.com [137.134.41.99]) by tcsi.tcs.com (8.6.10/8.6.10) with ESMTP id KAA10024; Mon, 27 Nov 1995 10:02:43 -0800 Received: from cozumel.tcs.com (cozumel.tcs.com [137.134.104.12]) by phact.tcs.com (8.6.10/8.6.10) with ESMTP id KAA19072; Mon, 27 Nov 1995 10:02:41 -0800 From: Douglas Ambrisko Received: (ambrisko@localhost) by cozumel.tcs.com (8.6.10/8.6.10) id KAA27054; Mon, 27 Nov 1995 10:02:25 -0800 Message-Id: <199511271802.KAA27054@cozumel.tcs.com> Subject: Re: Anyone keen to help me get a Phillips CDD 521 Recorder working? To: joerg_wunsch@uriah.heep.sax.de Date: Mon, 27 Nov 1995 10:02:24 -0800 (PST) Cc: freebsd-hackers@freebsd.org, ambrisko@tcs.com In-Reply-To: <199511230844.JAA25813@uriah.heep.sax.de> from "J Wunsch" at Nov 23, 95 09:44:57 am X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 1335 Sender: owner-hackers@freebsd.org Precedence: bulk J Wunsch writes: | | As Jordan K. Hubbard wrote: | > | > We have the YMI gear ourselves, and have multiple burner boxes | > scattered across different platforms, but that's no reason not to try | > to push the envelope a little.. :-) We've been wanting to see if this | > was even *possible* for awhile now. Now at least one of us has | > something that we can try a few proof-of-concept pokes at. | | I would use rtprio, btw. Given the fact that even the fastest CD | readers do not feed much more than 500 KB/s, and under the assumption | that a burner is way slower, the probability of success ain't that | bad. | | Of course, one should not run a "make world" in background... :-) I'll checkout rtprio, and I'm sorry I don't have all the specifics right now (you can probably find them at http://www.cdarchives.com) but the Yamaha is a 4X writer with only 512k buffer. This drive tends to have under run problems unless you do burns at single-user level. The issue is that is takes 20mins to do the burn and someone might not think and do parallel make worlds! Also Kodak has a 6X writer and people may have multiple writers. I would think it would be way cool to produce reliable CD-R's on FreeBSD by just plugging in a CD-R on the SCSI bus, but right now I'm a bit nervous and wouldn't bet my day job on it. Doug A.