From owner-freebsd-scsi Thu Aug 15 14:52:31 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id OAA26677 for freebsd-scsi-outgoing; Thu, 15 Aug 1996 14:52:31 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id OAA26659 for ; Thu, 15 Aug 1996 14:52:25 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id XAA07297; Thu, 15 Aug 1996 23:51:04 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id XAA07844; Thu, 15 Aug 1996 23:51:03 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id XAA02774; Thu, 15 Aug 1996 23:38:31 +0200 (MET DST) From: J Wunsch Message-Id: <199608152138.XAA02774@uriah.heep.sax.de> Subject: Re: Pioneer CD changer problem To: freebsd-scsi@freebsd.org Date: Thu, 15 Aug 1996 23:38:31 +0200 (MET DST) Cc: count@key.hole.fi (Bror 'Count' Heinola) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199608152059.XAA00463@key.hole.fi> from Bror 'Count' Heinola at "Aug 15, 96 11:59:11 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Bror 'Count' Heinola wrote: > > Can you here it swapping the disk in by the same time? Does it > > continue to fail even after a few attempts? > > Yes, and yes. The second `yes' is strange. The Nakamichi seem to respond timely after a few attempts. Only mounting (i.e., cdopen()) appears to be that time-critical, once the disks are mounted, i can swap them around at will as long as i'm reading only one medium at a time. Concurrent reading will first thrash the changer, and eventually cause more serious faults later. > Anyways, any pointers to the code where I might go and change > the current timeout values? It's the 7th parameter to the function scsi_scsi_cmd(), have a look at /sys/scsi/cd.c. (Btw., things like scsi_scsi_cmd() are good candidates for section 9 man pages. If someone provides me with the input data, i'm offering help to -mdoc'ify them.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)