From owner-freebsd-current Tue Oct 3 00:26:12 1995 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id AAA24499 for current-outgoing; Tue, 3 Oct 1995 00:26:12 -0700 Received: from zibbi.mikom.csir.co.za (zibbi.mikom.csir.co.za [146.64.24.58]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id AAA24429 for ; Tue, 3 Oct 1995 00:24:33 -0700 Received: (from jhay@localhost) by zibbi.mikom.csir.co.za (8.6.11/8.6.9) id JAA01534 for freebsd-current@FreeBSD.ORG; Tue, 3 Oct 1995 09:21:05 +0200 From: John Hay Message-Id: <199510030721.JAA01534@zibbi.mikom.csir.co.za> Subject: stable panics while backup to ncr->DAT To: freebsd-current@FreeBSD.ORG (FreeBSD-current) Date: Tue, 3 Oct 1995 09:21:05 +0200 (SAT) X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 5499 Sender: owner-current@FreeBSD.ORG Precedence: bulk Hi, I have a 100MHz Pentium with an ASUS motherboard (Sis chipset). The machine is running a small news feed, a web server and is a ftp site. It has the latest 2.1-stable as from ctm yesterday. There is normally no problems, everything is working fine. The machine has been running for a few weeks now. It is only when trying to make backups to the DAT tape that I often get problems. I would guess about 8 out 10 backups will end in a kernel panic. It seems that there is an error with the tape and while handling that the ncr code does a read to 0. Maybe just to make thing clear. The problem did not start now, it started when I got the EXABYTE DAT a few weeks ago. I had 2.0.5 running on the machine then, but got lots of problems with the DAT. I saw that there were some fixes to the NCR code and decided to try stable on that machine. It is better now because I can sometimes get the backup to go right through, while previously it would die with the first access to the tape. Below is the boot probe messages, then a cutout of "nm /kernel | sort | more" and then the error and panic message. -- John Hay -- John.Hay@csir.co.za ------------------------------------------------------------------------------ Booting sd(0,a)/kernel @ 0x100000 text=0x8e000 data=0xb000 bss=0x9f54 symbols=[+0xac+0x4+0xa9e0+0x4+0xb1a5] total=0x1b8b8d entry point=0x100000 BIOS basemem (635K) != RTC basemem (640K) Copyright (c) 1982, 1986, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. FreeBSD 2.1-STABLE #1: Mon Oct 2 20:18:27 SAT 1995 jhay@callisto.cids.org.za:/usr/src/sys/compile/CALLISTO CPU: 100-MHz Pentium 815\100 (Pentium-class CPU) Origin = "GenuineIntel" Id = 0x525 Stepping=5 Features=0x1bf real memory = 33554432 (32768K bytes) avail memory = 31559680 (30820K bytes) 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 sio0 at 0x3f8-0x3ff irq 4 on isa sio0: type 16550A sio1 at 0x2f8-0x2ff irq 3 on isa sio1: type 16550A sio2 not found at 0x3e8 sio3 not found at 0x2e8 lpt0 at 0x278-0x27f irq 7 on isa lpt0: Interrupt-driven port lp0: TCP/IP capable interface fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa npx0 on motherboard npx0: INT 16 interface Probing for devices on the PCI bus: chip0 rev 0 on pci0:0 chip1 rev 0 on pci0:1 de0 rev 35 int a irq 15 on pci0:9 de0: DC21040 [10Mb/s] pass 2.3 Ethernet address 00:00:e8:0d:93:69 de0: enabling Thinwire/AUI port ncr0 rev 2 int a irq 9 on pci0:11 ncr0: restart (scsi reset). ncr0 scanning for targets 0..6 (V2 pl22 95/07/07) (ncr0:0:0): "FUJITSU M2934S-512 0103" type 0 fixed SCSI 2 sd0(ncr0:0:0): Direct-Access sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8. 4153MB (8506782 512 byte sectors) (ncr0:6:0): "EXABYTE EXB-4200c 217" type 1 removable SCSI 2 st0(ncr0:6:0): Sequential-Access st0(ncr0:6:0): 200ns (5 Mb/sec) offset 8. density code 0x13, drive empty pci0:13: CMD, device=0x640, class=storage (ide) [no driver assigned] WARNING: / was not properly dismounted. swapon: adding /dev/sd0s1b as swap device f0141fa4 t _ncr_init f0142194 t _ncr_negotiate f0142260 t _ncr_setsync f014242c t _ncr_setwide f0142558 t _ncr_setmaxtags f014258c t _ncr_settags f01425e8 t _ncr_usercmd f01427c0 t _ncr_timeout f0142b28 t _ncr_exception <------ f0142f40 t _ncr_int_sto f0143160 t _ncr_int_ma f014347c t _ncr_show_msg f01436b4 t _ncr_int_sir f0143c94 t _ncr_get_ccb Tue Oct 3 07:23:39 SAT 1995 ncr0 targ 6?: ERROR (0:110) (8-28-0) (88/13) @ (ed0:180003b0). reg: da 10 80 13 47 88 6 1f 3 8 86 28 0 60 0 0. Fatal trap 12: page fault while in kernel mode fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xf0142d8f code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = Idle interrupt mask = bio panic: page fault syncing disks... ncr0 targ 6?: ERROR (0:101) (8-28-0) (88/13) @ (ed0:180003b0). reg: da 10 80 13 47 88 6 1f 3 8 86 28 0 60 0 0. Fatal trap 12: page fault while in kernel mode fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xf0142d8f code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = Idle interrupt mask = bio panic: page fault dumping to dev 20401, offset 131072 dump ncr0 targ 6?: ERROR (0:101) (8-28-0) (88/13) @ (ed0:180003b0). reg: da 10 80 13 47 88 6 1f 3 8 86 28 0 60 0 0. Fatal trap 12: page fault while in kernel mode fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xf0142d8f code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = Idle interrupt mask = net tty bio panic: page fault dumping to dev 20401, offset 131072 dump device not ready Automatic reboot in 15 seconds - press a key on the console to abort Rebooting...