From owner-freebsd-hackers Mon Jun 5 06:23:22 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id GAA29958 for hackers-outgoing; Mon, 5 Jun 1995 06:23:22 -0700 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id GAA29943 for ; Mon, 5 Jun 1995 06:23:19 -0700 Received: from sax.sax.de by irz301.inf.tu-dresden.de with SMTP (5.67b+/DEC-Ultrix/4.3) id AA14931; Mon, 5 Jun 1995 15:23:17 +0200 Received: by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id PAA08613; Mon, 5 Jun 1995 15:23:15 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.6.11/8.6.9) id PAA03258; Mon, 5 Jun 1995 15:03:17 +0200 From: J Wunsch Message-Id: <199506051303.PAA03258@uriah.heep.sax.de> Subject: Re: why won't my tape drive keep streaming? To: mpp@legarto.minn.net (Mike Pritchard) Date: Mon, 5 Jun 1995 15:03:17 +0200 (MET DST) Cc: hackers@freebsd.org In-Reply-To: <199506050254.VAA01688@mpp.com> from "Mike Pritchard" at Jun 4, 95 09:54:23 pm Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 914 Sender: hackers-owner@freebsd.org Precedence: bulk As Mike Pritchard wrote: > > I have an Archive 2150S SCSI tape drive attached to An Adaptec 2842VL > controller. This drive is capable of writing 6MB+ per minute, but > I rarely see that under FreeBSD (running -current). I've been using an Archive Viper 150 for a long time (lately been replaced by a Tandberg 3660). I never had problems with it, neither with an Adaptec AHA-1540A, nor with the BusLogic Bt-742A i'm using now. The tape usually kept streaming, resulting in 250 - 300 MB/h backup speed. I remember that the Viper 150 has an additional jumper block (the middle row) which determined some kind of a block size. The setting of these jumpers actually had an effect on the possible speed of operation, but i cannot remember the setting i've been using. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)