From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 28 Jan 2001 02:16:59 -0500 From: Daniel Eisenbud To: linuxppc-dev@lists.linuxppc.org Subject: Re: mesh SCSI bus locks hard on 7500 when burning a CD-R in dao mode Message-ID: <20010128021658.A18189@allspice.cs.swarthmore.edu> References: <20010126160441.B16573@allspice.cs.swarthmore.edu> <20010127163115.B2695@allspice.cs.swarthmore.edu> <20010127195924.A19744@allspice.cs.swarthmore.edu> <20010127202500.A21618@allspice.cs.swarthmore.edu> <20010127213401.A26295@allspice.cs.swarthmore.edu> <20010128000929.A9218@allspice.cs.swarthmore.edu> <20010128001147.B9218@allspice.cs.swarthmore.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20010128001147.B9218@allspice.cs.swarthmore.edu>; from eisenbud@cs.swarthmore.edu on Sun, Jan 28, 2001 at 12:11:47AM -0500 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: More output. It looks like SCSI dies when cdrecord sends the cue sheet, which it only does in DAO mode, the SCSI driver dies, as exemplified in this portion of its output in verbose mode: Executing 'send_cue_sheet' command on Bus 0 Target 3, Lun 0 timeout 200s CDB: 5D 00 00 00 00 00 00 00 20 00 DMA addr: 0x100404F0 size: 32 - using copy buffer pack_len: 36, reply_len: 36 pack_id: 70 result: 0 sense[0]: 00 cmd finished after 200.500s timeout 200s As you can see, it times out. Attached is a bzip2'ed tar file of the strace output (with timings, this time) and output of burning the same very short track (which happens to be the TOC of an audio CD, not that it seems to matter) in TAO mode and DAO mode. Now to get to the bottom of what about the "send_cue_sheet" command is losing. But I need to get some sleep first. If anyone has any ideas about what I might do to actually see the packet and actually watch what happens as it goes through the SCSI subsystem, that would be great. I can see xmon looming in my future. :-) -Daniel -- Daniel E. Eisenbud eisenbud@cs.swarthmore.edu ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/