Date: Sat, 24 Oct 1998 13:18:12 -0400
From: Harlan Stenn <Harlan.Stenn@pfcs.com>
To: questions@FreeBSD.ORG
Subject: debugger("bt742a")?
Message-ID: <4313.909249492@brown.pfcs.com>
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I've been having a problem reading data off a tape drive. I run X, and the
tape would read for a while and eventually the machine would simply hang and
I could not change virtual consoles or do anything to find the problem.
I tried reading the tape on another machine. Once it worked, two other
times I had the same problem.
So I tried it again, but this time I did the restore from the vt0 instead
of in X. I noticed the kernel was dropping in to the debugger, with a
"tag" of bt742a.
What's the real problem here, and what can be done to fix it?
This machine is:
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.7-STABLE #0: Tue Oct 6 20:32:04 EDT 1998
supfcs@brown.pfcs.com:/D/2/fb-src/src/sys/compile/BROWN
CPU: Pentium/P54C (90.00-MHz 586-class CPU)
Origin = "GenuineIntel" Id = 0x524 Stepping=4
Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
real memory = 100663296 (98304K bytes)
avail memory = 95924224 (93676K bytes)
Probing for devices on PCI bus 0:
chip0 <SiS 85c501> rev 57 on pci0:0:0
chip1 <SiS 85c503> rev 0 on pci0:1:0
vga0 <VGA-compatible display device> rev 0 int a irq 9 on pci0:10:0
bt0 <Buslogic 946 SCSI host adapter> rev 0 int a irq 11 on pci0:11:0
bt0: Bt946C/ 0-(32bit) bus
bt0: reading board settings, busmastering, int=11
bt0: version 4.25J, fast sync, parity, 32 mbxs, 32 ccbs
bt0: targ 0 sync rate=10.00MB/s(100ns), offset=15
bt0: targ 1 sync rate=10.00MB/s(100ns), offset=15
bt0: targ 2 sync rate=10.00MB/s(100ns), offset=15
bt0: targ 5 sync rate= 5.00MB/s(200ns), offset=15
bt0: targ 6 sync rate= 4.00MB/s(250ns), offset=15
bt0: Using Strict Round robin scheme
bt0 waiting for scsi devices to settle
(bt0:0:0): "SEAGATE ST32550N 0014" type 0 fixed SCSI 2
sd0(bt0:0:0): Direct-Access 2047MB (4194058 512 byte sectors)
(bt0:1:0): "SEAGATE ST15150N 0022" type 0 fixed SCSI 2
sd1(bt0:1:0): Direct-Access 4095MB (8388315 512 byte sectors)
(bt0:2:0): "SEAGATE ST15150N 0022" type 0 fixed SCSI 2
sd2(bt0:2:0): Direct-Access 4095MB (8388315 512 byte sectors)
(bt0:5:0): "ARCHIVE Python 28388-XXX 4.98" type 1 removable SCSI 2
st0(bt0:5:0): Sequential-Access density code 0x13, drive empty
(bt0:6:0): "TOSHIBA CD-ROM XM-3501TA 3384" type 5 removable SCSI 2
cd0(bt0:6:0): CD-ROM cd present [322273 x 2048 byte records]
pci0:13: CMD, device=0x0640, class=storage (ide) int a irq 14 [no driver assigned]
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
ed0 not found at 0x280
ed1 at 0x340-0x35f irq 10 on isa
ed1: address 00:40:33:28:36:78, type NE2000 (16 bit)
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
sio2: configured irq 5 not in bitmap of probed irqs 0
sio2 not found at 0x3e8
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
bt: unit number (1) too high
bt1 not found at 0x330
npx0 flags 0x1 on motherboard
npx0: INT 16 interface
sb0 at 0x220 irq 7 drq 1 on isa
sb0: <SoundBlaster 16 4.12>
sbxvi0 at 0x0 drq 5 on isa
sbxvi0: <SoundBlaster 16 4.12>
sbmidi0 at 0x300 on isa
<SoundBlaster MPU-401>
opl0 at 0x388 on isa
opl0: <Yamaha OPL-3 FM>
Intel Pentium F00F detected, installing workaround
changing root device to sd0s2a
WARNING: / was not properly dismounted.
PCM device 1 not installed.
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