Date: Fri, 16 Mar 2001 08:06:29 -0600 (CST) From: "M. L. Dodson" <bdodson@scms.utmb.EDU> To: freebsd-stable@FreeBSD.ORG Subject: disk hard read error: anything to be done? Message-ID: <200103161406.f2GE6TR00415@histidine.utmb.edu>
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The following just showed up in my overnight logs (Things had
been working just fine, hardware wise, for months. No changes,
hardware or software associated with the appearance.):
ad0: HARD READ ERROR blk# 983151ad0: HARD READ ERROR blk# 983151 status=59 error=40
ad0: DMA problem fallback to PIO mode
Should I do anything about this (I understand that at least one
sector is going/gone dodgy). It appeared again when I rebooted
(at the file sync stage), then again (approximately) when xdm was
starting. I read ata-disk.c, but it is not clear to me whether
the whole driver goes into pio mode if this happens, or whether
it just uses pio to read the troublesome block.
Thanks,
Bud Dodson
uname -a (lines wrapped):
FreeBSD wotan.invalid 4.2-STABLE FreeBSD 4.2-STABLE #7: \
Fri Mar 2 20:31:28 CST 2001 \
bdodson@wotan.invalid:/usr/obj/usr/src/sys/WOTAN i386
dmesg:
Copyright (c) 1992-2001 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 4.2-STABLE #7: Fri Mar 2 20:31:28 CST 2001
bdodson@wotan.invalid:/usr/obj/usr/src/sys/WOTAN
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 397947888 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (397.95-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping = 2
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory = 134205440 (131060K bytes)
config> q
avail memory = 126971904 (123996K bytes)
Preloaded elf kernel "kernel" at 0xc03a5000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc03a509c.
Preloaded elf module "agp.ko" at 0xc03a50ec.
Preloaded elf module "mga.ko" at 0xc03a5188.
Preloaded elf module "drm.ko" at 0xc03a5224.
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xf8000000-0xfbffffff at device 0.0 on pci0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
drm0: <Matrox MGA G400 AGP graphics accelerator> mem 0xf4800000-0xf4ffffff,0xf4100000-0xf4103fff,0xf6000000-0xf7ffffff irq 11 at device 0.0 on pci1
info: [drm] AGP at 0xf8000000 64MB
info: [drm] Initialized mga 1.0.0 19991213 on minor 0
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0x1820-0x182f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0x1800-0x181f irq 9 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> 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
chip0: <Intel 82371AB Power management controller> port 0x7000-0x700f at device 7.3 on pci0
dc0: <LC82C115 PNIC II 10/100BaseTX> port 0x1000-0x10ff mem 0xf4001000-0xf40010ff irq 11 at device 14.0 on pci0
dc0: Ethernet address: 00:a0:cc:36:bf:5f
miibus0: <MII bus> on dc0
dcphy0: <Intel 21143 NWAY media interface> on miibus0
dcphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0x1400-0x14ff mem 0xf4000000-0xf4000fff irq 9 at device 16.0 on pci0
aic7880: Single Channel A, SCSI Id=7, 16/255 SCBs
fdc0: <NEC 72065B or clone> 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: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
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: <Parallel port> at port 0x378-0x37f irq 7 flags 0x8 on isa0
ppc0: Generic chipset (ECP-only) in ECP mode
ppc0: FIFO with 16/16/8 bytes threshold
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
sbc0: <SoundBlaster 16> at port 0x220-0x22f irq 5 drq 1 flags 0x15 on isa0
pcm0: <SB16 DSP 4.13> on sbc0
IP packet filtering initialized, divert enabled, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default
ad0: 14649MB <IBM-DTLA-307015> [29765/16/63] at ata0-master UDMA33
afd0: 96MB <IOMEGA ZIP 100 ATAPI> [32/64/96] at ata1-master using PIO0
Waiting 5 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ad0s1a
cd0 at ahc0 bus 0 target 6 lun 0
cd0: <TOSHIBA CD-ROM XM-3501TA 3054> Removable CD-ROM SCSI-2 device
cd0: 4.237MB/s transfers (4.237MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present
ad0: HARD READ ERROR blk# 983151ad0: HARD READ ERROR blk# 983151 status=59 error=40
ad0: DMA problem fallback to PIO mode
--
M. L. Dodson bdodson@scms.utmb.edu
409-772-2178 FAX: 409-772-1790
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