Date: Fri, 16 Aug 1996 01:06:52 +0300 (EET DST) From: "Bror 'Count' Heinola" <count@key.hole.fi> To: joerg_wunsch@uriah.heep.sax.de Cc: freebsd-scsi@freebsd.org Subject: Re: Pioneer CD changer problem Message-ID: <199608152206.BAA00740@key.hole.fi> In-Reply-To: <199608152138.XAA02774@uriah.heep.sax.de> from "J Wunsch" at Aug 15, 96 11:38:31 pm
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J Wunsch taisi sanoa: > 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. Perhaps I should explain a bit better. When I try to access the first disc (cd0) the changer takes it from the cartridge, spins it and returns it. All subsequent accesses to cd0 will result in message "open: no CD in" as long as I eject the cartridge and re-insert it. Then I can load it once again etc. This holds true for all the discs. > 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.) Thanks, I'll look into that when I'm a bit more alert. -- Bror 'Count' Heinola % count@key.hole.fi % http://pobox.com/~count/ Pengerkatu 13b A5 % IRC: Count NIC: BH271 % FI-00530 HELSINKI % Work: bror@sms.fi % Roads? Where we're going, Cell: +358-40-5533-554 % Santa Monica Software % we don't need roads.
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