From owner-freebsd-hackers Fri Sep 22 15:57:54 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from wilma.widomaker.com (wilma.widomaker.com [204.17.220.5]) by hub.freebsd.org (Postfix) with ESMTP id 1557E37B440 for ; Fri, 22 Sep 2000 15:57:47 -0700 (PDT) Received: from [206.246.249.98] (helo=escape) by wilma.widomaker.com with esmtp (Exim 3.16 #2) id 13cblF-0005Cv-00 for freebsd-hackers@freebsd.org; Fri, 22 Sep 2000 18:57:41 -0400 Received: from shannon by escape with local (Exim 3.12 #1 (Debian)) id 13cblA-0001au-00 for ; Fri, 22 Sep 2000 18:57:36 -0400 Date: Fri, 22 Sep 2000 18:57:36 -0400 From: Shannon Hendrix To: freebsd-hackers@freebsd.org Subject: SCSI tape speed Message-ID: <20000922185736.C5978@widomaker.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I'm interested in hearing from anyone who uses DAT drives on a DPT SCSI controller, preferrably with FreeBSD 4.1 and an Intel system. I find the speed is very slow, and I know in the past these drives were fine with FreeBSD, though I can't remember which release now. With my most recent install of FreeBSD 4.1, I am lucky to get 3MB/minute on a drive and controller combination that I know can hit 45MB/min. Right now, with NetBSD on an old Sparc 5, they still get 20MB/min or better. No errors, even large restores are perfect, but take many hours to finish. The controller I have is a DPT-2044W, and it currently has the ROM version DPT suggested for use with tape drives. The drives in question are an Archive Python 4-tape robot and a Seagate Scorpion. Both are DDS2 drives. No load on the DPT except for tapes and a CD-ROM burner. I haven't been able to find much information on this particular setup, and most tape woes seem error related, or related to another platform. -- "Those who trade liberty for security will have neither -- | | | (??)" | | | ________________________________________________________________ / | \ s h a n n o n @ w i d o m a k e r . c o m _/ | \_ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message