Date: Thu, 3 Dec 1998 07:26:06 -0700 (MST) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Kyle Mestery <mestery@winternet.com> Cc: scsi@FreeBSD.ORG, ken@plutotech.com Subject: Re: Still errors stopping audio CDs in current Message-ID: <199812031426.HAA59829@narnia.plutotech.com> In-Reply-To: <Pine.GSO.4.05.9812030551540.29436-100000@tundra.winternet.com>
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In article <Pine.GSO.4.05.9812030551540.29436-100000@tundra.winternet.com> you wrote: >> camcontrol inquiry -v -n cd -u 0 >> > su-2.00# camcontrol inquiry -v -n cd -u 0 > <SONY CD-ROM CDU-76S 1.1c> Removable CD-ROM SCSI2 device > (pass1:bt0:0:4:0): INQUIRY. CDB: 12 1 80 0 ff 0 > (pass1:bt0:0:4:0): ILLEGAL REQUEST asc:24,0 > (pass1:bt0:0:4:0): Invalid field in CDB > Serial Number 5.0MB/s transfers (5.0MHz, offset 15) camcontrol shouldn't print the 'Serial Number' header if the device doesn't have one. > It hangs at that point. Here is debugging info once I enabled debugging on > the drive. It looks like the kernel is continually trying to send a STOP > command to the drive: > > (cd0:bt0:0:4:0): PREVENT ALLOW MEDIUM REMOVAL. CDB: 1e 0 0 0 1 0 > (cd0:bt0:0:4:0): PREVENT ALLOW MEDIUM REMOVAL. CDB: 1e 0 0 0 1 0 Bug #1: cdopen doesn't do an ALLOW MEDIA REMOVAL before returning an error if an open fails. Bug #2: We almost want to mark the media as potentially invalid if the user issues an ALLOW MEDIA REMOVAL ioctl so we don't get confused when I/O starts up again. This isn't a problem you are seeing... yet. > (cd0:bt0:0:4:0): PLAY AUDIO TRACK INDEX. CDB: 48 0 0 0 6 1 0 12 1 0 > (cd0:bt0:0:4:0): STOP START UNIT. CDB: 1b 0 0 0 0 0 > (cd0:bt0:0:4:0): STOP START UNIT. CDB: 1b 0 0 0 0 0 Hmm. Perhaps the drive is returning a unit attention condition each time we perform a stop? That might explain why the kernel is constantly retrying the command. It could also be that the client program is performing the retries because of an error returned by the ioctl. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the messagehelp
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