From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 28 Jan 2001 00:09:29 -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: <20010128000929.A9218@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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20010127213401.A26295@allspice.cs.swarthmore.edu>; from eisenbud@cs.swarthmore.edu on Sat, Jan 27, 2001 at 09:34:01PM -0500 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Sat, Jan 27, 2001 at 09:34:01PM -0500, Daniel Eisenbud wrote: > Maybe the next thing to do (why didn't I think of this sooner?) is to > strace cdrdao and cdrecord and see what system call they're really > hanging in, and what difference there is between what they do in dao > mode and what they do in tao mode. More later! Attached is strace output from cdrdao. I honsetly can't make much of it, but maybe someone else will be able to? I'm not sure if it hung in the last read or the last write. I think it was the last read, because strace printed part of that line and then its output file (which I put on a ramdisk, and tarred to a floppy from there, so I wouldn't have to copy it by hand once my SCSI bus was useless) didn't change for a while, and then the read line finished printing. There's probably a way to make strace print timestamps, and I'll do that tomorrow (as well as doing this with cdrecord in both disk-at-once and track-at-once modes to be able to compare them. -Daniel -- Daniel E. Eisenbud eisenbud@cs.swarthmore.edu ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/