From owner-freebsd-hackers Thu Jan 4 17:24:46 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id RAA08538 for hackers-outgoing; Thu, 4 Jan 1996 17:24:46 -0800 (PST) Received: from time.cdrom.com (time.cdrom.com [192.216.222.226]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id RAA08529 for ; Thu, 4 Jan 1996 17:24:43 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by time.cdrom.com (8.6.12/8.6.9) with SMTP id RAA02078; Thu, 4 Jan 1996 17:23:57 -0800 To: Ben Jackson cc: "Amancio Hasty Jr." , hackers@FreeBSD.ORG Subject: Re: buggy 2940 driver? In-reply-to: Your message of "Thu, 04 Jan 1996 16:47:23 PST." <199601050047.QAA02879@eng4.sequent.com> Date: Thu, 04 Jan 1996 17:23:57 -0800 Message-ID: <2076.820805037@time.cdrom.com> From: "Jordan K. Hubbard" Sender: owner-hackers@FreeBSD.ORG Precedence: bulk > I have a 2940 connected to (among other things) a QUPD1800S. During > extended periods of heavy read activity (ie backups) the device and/or > card will eventually hang, leaving the machine hung (there's a swap > partition on that disk). The tape drive is on another SCSI controller, Is this one of the older 2940s? Do you have transfers set to 10Mb/sec in the SCSI device configuration setup for the PD1800 drive? I've been told that the older controllers actually run *faster* than the specified clock rate at the `top end' in order to work around a race condition that they later fixed. Most drives don't mind the overclocking, but some Quantums apparently have conniptions. You might try fiddling with the transfer speed! Jordan