From owner-freebsd-hardware Fri Aug 2 19:12:27 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id TAA17139 for hardware-outgoing; Fri, 2 Aug 1996 19:12:27 -0700 (PDT) Received: from relay.hp.com (relay.hp.com [15.255.152.2]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id TAA17128 for ; Fri, 2 Aug 1996 19:12:23 -0700 (PDT) Received: from srmail.sr.hp.com by relay.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3) id AA016768339; Fri, 2 Aug 1996 19:12:20 -0700 Received: from hpnmhjw.sr.hp.com by srmail.sr.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3) id AA234568338; Fri, 2 Aug 1996 19:12:19 -0700 Received: from mina.sr.hp.com by hpnmhjw.sr.hp.com with SMTP (1.37.109.16/15.5+ECS 3.3) id AA085678338; Fri, 2 Aug 1996 19:12:18 -0700 Message-Id: <199608030212.AA085678338@hpnmhjw.sr.hp.com> To: Jim Shankland Cc: freebsd-hardware@freebsd.org Subject: Re: h/w requirements for CD-R writing? In-Reply-To: Your message of "Fri, 02 Aug 1996 13:09:41 PDT." <199608022009.NAA14408@saguaro.flyingfox.com> Date: Fri, 02 Aug 1996 19:12:17 -0700 From: Darryl Okahata Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > The tentative plan is to dedicate an old 66 MHz Pentium box with > an NCR53C810 on the motherboard, with a 1.3 GB SCSI-2 HP disk > (4KRPM, 13.5 ms average access, ca. 2 MB/s sustained transfer rate), > plus a CD-writer to be determined, to this task. Is this > likely to work? Probably -- but you haven't said how much RAM you have. I've burned CDs using a 25MHz 386 and a 1542B (both HD & burner are connected to the 1542). However, an important criteria is RAM; this lowly 386 has 16MB. You've got to have enough free RAM to allow the team(1) processes to act as a user-land cache, which probably means that you should have at least 12-16MB of RAM (assuming that you do NOT have any memory-hungry programs like X11 ones running). You can probably get by with 8MB RAM, but I'm not sure. I wouldn't even think about it with only 4MB. Note that burning a CD is a disk-space-intensive, two-step process: (1) you create an CDROM image file from the files that you want to go onto the CD, and (2) you burn the CD using the image file (and NOT the original directory tree). The bottom line is that you'll need again as much disk space as that used to hold the files that you want to place onto the CD. In a worst-case scenario (a completely full CDROM), you'll need 650MB+650MB==> ~1.3GB of disk space. However, if you're only placing ~400MB of files onto the CDROM, you'll only need around ~800MB of space. Also note that you cannot always use symlinks in the original directory tree. In the case of symlinks pointing to files, the symlinks are either placed onto the CD, or they're ignored (there's no way to follow them). In the case of symlinks pointing to directories, I think they can be placed onto the CD, followed or ignored (I haven't tried this). -- Darryl Okahata Internet: darrylo@sr.hp.com DISCLAIMER: this message is the author's personal opinion and does not constitute the support, opinion, or policy of Hewlett-Packard, or of the little green men that have been following him all day.