From owner-freebsd-hackers Wed Sep 27 14:44:19 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from bingnet2.cc.binghamton.edu (bingnet2.cc.binghamton.edu [128.226.1.18]) by hub.freebsd.org (Postfix) with ESMTP id 531D037B422 for ; Wed, 27 Sep 2000 14:44:03 -0700 (PDT) Received: from opal (cs.binghamton.edu [128.226.123.101]) by bingnet2.cc.binghamton.edu (8.9.3/8.9.3) with ESMTP id RAA20926 for ; Wed, 27 Sep 2000 17:43:55 -0400 (EDT) Date: Wed, 27 Sep 2000 17:43:35 -0400 (EDT) From: Zhiui Zhang X-Sender: zzhang@opal To: freebsd-hackers@freebsd.org Subject: system hangs with BUS Reset Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I am debugging a program that does a lot of disk I/O and the system hangs briefly with the some repeated messages that looks like: (da0:ahc0:0:0:0): SCB 0x0 - Timed out in Data-in phase, SEQADDR==0x88 (da0:ahc0:0:0:0): BDR message in message buffer (da0:ahc0:0:0:0): SCB 0x0 - Timed out in Data-in phase, SEQADDR==0x89 (da0:ahc0:0:0:0): no longer in timeout, status= 34b ahc0: Issued Channel A Bus Reset. 2SCBs aborted. What should I do now? The following is my dmesg output: Copyright (c) 1992-2000 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.1-RELEASE #0: Tue Sep 26 01:34:11 GMT 2000 root@mercury.cs.binghamton.edu:/usr/src/sys/compile/SUNYFS Timecounter "i8254" frequency 1193182 Hz CPU: Pentium III/Pentium III Xeon/Celeron (501.14-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x673 Stepping = 3 Features=0x383fbff real memory = 134205440 (131060K bytes) avail memory = 126341120 (123380K bytes) Preloaded elf kernel "kernel" at 0xc0419000. Pentium Pro MTRR support enabled md0: Malloc disk npx0: on motherboard npx0: INT 16 interface pcib0: on motherboard pci0: on pcib0 pcib1: at device 1.0 on pci0 pci1: on pcib1 isab0: at device 4.0 on pci0 isa0: on isab0 atapci0: port 0xd800-0xd80f at device 4.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 uhci0: port 0xd400-0xd41f irq 10 at device 4.2 on pci0 usb0: on uhci0 usb0: USB revision 1.0 uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered uhub0: port 1 power on failed, IOERROR uhub0: port 2 power on failed, IOERROR chip1: port 0xe800-0xe80f at device 4.3 on pci0 ahc0: port 0xd000-0xd0ff mem 0xe3000000-0xe3000fff irq 10 at device 6.0 on pci0 ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs dc0: port 0xb800-0xb8ff mem 0xe2800000-0xe28000ff irq 11 at device 10.0 on pci0 dc0: Ethernet address: 00:a0:cc:e4:b7:14 miibus0: on dc0 dcphy0: on miibus0 dcphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto fdc0: at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 atkbdc0: at port 0x60,0x64 on isa0 atkbd0: flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 vga0: at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sc0: at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A ppc0: at port 0x378-0x37f irq 7 on isa0 ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode ppc0: FIFO with 16/16/9 bytes threshold ppi0: on ppbus0 lpt0: on ppbus0 lpt0: Interrupt-driven port plip0: on ppbus0 ata0-slave: ata_command: timeout waiting for intr ata0-slave: identify failed acd0: CDROM at ata0-master using PIO4 Waiting 15 seconds for SCSI devices to settle Mounting root from ufs:/dev/da0s1a da0 at ahc0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-2 device da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled da0: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C) WARNING: / was not properly dismounted Any help is appreciated. -Zhihui To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message