Date: Wed, 18 Mar 1998 01:28:56 -0800 From: Darryl Okahata <darrylo@mina.sr.hp.com> To: freebsd-hardware@FreeBSD.ORG Subject: Re: CD-R and Scanner recomendations for CD archiving of records? Message-ID: <199803180928.AA014003337@mina.sr.hp.com> In-Reply-To: Your message of "Tue, 17 Mar 1998 22:15:08 %2B0100." <350EE7DC.78D6@xs4all.nl>
next in thread | previous in thread | raw e-mail | index | archive | help
Rob Schofield <schofiel@xs4all.nl> wrote:
> The system basically should not be doing ANYTHING other than swap, so
> knock out EVERYTHING before you start.
>
> You need to have SIGNIFICANTLY more buffer space than is recommended
> (2-3X), and you are far better building an image on a hard disk rather
> than copy CD-CD. A bucket load of unecessarily free RAM helps too.
>
> Hard disks really need to to be in large block mode, or multi-sector;
> 7,200 RPM drives seem to be almost obligatory. DISABLE read cache on
> SCSI drives. Adjacent SCSI IDs are a good idea for the two drives
> involved in the read and write, with the Write drive at SCSI ID 6
> (highest bus negotiation priority).
While these recommendations don't hurt, they're not always
necessary. Joerg Wunsch (joerg_wunsch@uriah.heep.sax.de) has put a lot
of work into getting CDRs working well with FreeBSD. A few months back,
he mentioned to me that he's burning CDROMs on a system that runs X11
and is being used as his company's lpd filter, running ghostscript
rendering jobs. He did need 32MB RAM, though.
I occasionally burn CDROMs on an ancient 16MB 386 (25MHz). It's
running FreeBSD 2.2-960612-SNAP (yeah, it works, and so I'm too lazy to
upgrade it). It's also using as ISA-based 1542C SCSI controller (slow)
with a slow hard disk. I only have problems with it if I try to burn
more than 2-3 CDRs in a row (the old drive that I'm using appears to
overheat and the burn fails).
[ The old drive I'm using (an HP4020i, which is, I believe, a renamed
Phillips drive) is only rated to 85deg.F. Yes, that's not a typo --
that's eighty-five degrees Fahrenheit. ;-( ]
You don't need the latest high-performance hardware to burn CDROMs,
although it does help to have a decent burner ;-).
-- 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.
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hardware" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199803180928.AA014003337>