Date: Sat, 13 Jul 1996 01:24:05 -0400 (EDT) From: Kenneth Merry <ken@ulc199.residence.gatech.edu> To: stable@freebsd.org Subject: playing CD's causes SCSI reset? Message-ID: <199607130524.BAA20683@ulc199.residence.gatech.edu>
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I had an interesting experience tonight while playing a CD in my
CDROM drive. (using WorkMan) I had the CD paused for a while, and then
came back and hit play. No problem. Next, I hit the button for song #10,
and song #7 was currently playing. Here's what I got:
=======
cd0(ahc0:1:0): timed out in command phase, SCSISIGI == 0x84
cd0(ahc0:1:0): asserted ATN - device reset in message buffer
cd0(ahc0:1:0): timed out in dataout phase, SCSISIGI == 0x0
ahc0: Issued Channel A Bus Reset #1. 1 SCBs aborted
sd0(ahc0:0:0): UNIT ATTENTION asc:29,2
, retries:4
=======
I tried various things a couple more times, and had similar
problems. I even tried xcdplayer, which caused another SCSI bus reset. I
finally got things working again using workman, but I'm not quite sure why.
I did get one variation on the error message. This may have happened when
I tried xcdplayer:
=======
cd0(ahc0:1:0): timed out in command phase, SCSISIGI == 0x84
cd0(ahc0:1:0): asserted ATN - device reset in message buffer
cd0(ahc0:1:0): timed out in dataout phase, SCSISIGI == 0x0
ahc0: Issued Channel A Bus Reset #1. 1 SCBs aborted
sd0(ahc0:0:0): UNIT ATTENTION asc:29,2
, retries:4
cd0(ahc0:1:0): UNIT ATTENTION asc:29,0
cd0(ahc0:1:0): Power on, reset, or bus device reset occurred
=======
It seems like the CD device, player, or something doesn't like
skipping to different tracks on a CD. Hitting the 'next track' button in
workman seems to have the same bus-reset effect as hitting a button for an
arbitrary track.
Anyway, here's my setup in case anyone has any ideas on what could be
wrong:
=======
FreeBSD 2.1-STABLE #0: Thu Jul 11 22:15:43 EDT 1996
ken@area238.residence.gatech.edu:/usr/src/sys/compile/thunderdome
CPU: i486 DX4 (486-class CPU)
Origin = "GenuineIntel" Id = 0x480 Stepping=0
Features=0x3<FPU,VME>
real memory = 67108864 (65536K bytes)
avail memory = 64028672 (62528K bytes)
ahc0: <Adaptec 284X SCSI host adapter> at 0x1c00-0x1cff irq 11 on isa
ahc0: aic7770 >= Rev E, Single Channel, SCSI Id=7, 4 SCBs
ahc0 waiting for scsi devices to settle
ahc0: target 0 Tagged Queuing Device
(ahc0:0:0): "Quantum XP34300 55B1" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 4101MB (8399520 512 byte sectors)
(ahc0:1:0): "NEC CD-ROM DRIVE:500 1.0" type 5 removable SCSI 2
cd0(ahc0:1:0): CD-ROM
cd0(ahc0:1:0): NOT READY asc:3a,0 Medium not present
can't get the size
(ahc0:4:0): "SONY SDT-5000 3.02" type 1 removable SCSI 2
st0(ahc0:4:0): Sequential-Access density code 0x13, drive empty
=======
I compiled the kernel on 7/11/96 with whatever the latest CTM
delta. (cvs-cur delta, that is)
This doesn't seem to be a real serious problem, the system stays
stable and all (Thanks Justin!) but it is a little strange.
Ken
--
Kenneth Merry
ken@ulc199.residence.gatech.edu
Disclaimer: I don't speak for GTRI, GT, or Elvis.
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