Re: Possible IDE corruption bug?

[John Goerzen <jgoerzen%complete.org@localhost>]

On Tue, Oct 27 2026, Jason Thorpe wrote:

>> On Oct 26, 2026, at 8:39 PM, John Goerzen <jgoerzen%complete.org@localhost> wrote:
>> 
>> Hi folks,
>> 
>> I have an AlphaPC 164LX (600MHz 21164a, 256MB RAM).
>
> Hey John.
>
> I’d like to get to the bottom of this. You’re the first person who’s booted
> NetBSD on an “EB164” type machine in quite some years, I think. There were a
> flurry of variants of that system type, each with different on-board ATA
> controllers, as well as different core logic chipset revisions etc., so knowing
> what chip and revision that’s on your specific machine is going to help a lot.

Thanks, Jason!  I appreciate it.  I am quite pleased that a) this system
still boots, and b) NetBSD can still run on it!

> If you could send me the entire “dmesg” output (on- or off-list, up to you),
> that’ll be a good start. In the mean time, I need to root through my
> documentation archive, I guess :-)

Attached here.  There's nothing particularly sensitive about it.  You'll
see that I have a SYM53C875 plugged in, but there are no active devices
connected to it.  That is correct for the moment.

Incidentally, your name sounded familiar but I couldn't quite figure out
why.  It turns out you emailed me a few times 30 years ago when I was
first investigating NetBSD, before I had regular web access.  That would
have been about a year before I bought this Alpha.  Small world.

- John

[     1.000000] consinit: not using prom console
[     1.000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[     1.000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[     1.000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[     1.000000]     2024, 2025, 2026
[     1.000000]     The NetBSD Foundation, Inc.  All rights reserved.
[     1.000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[     1.000000]     The Regents of the University of California.  All rights reserved.

[     1.000000] NetBSD 11.0 (GENERIC) #0: Thu Jul 30 15:23:12 UTC 2026
[     1.000000] 	mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/alpha/compile/GENERIC
[     1.000000] Digital AlphaPC 164LX 599 MHz
[     1.000000] 8192 byte page size, 1 processor.
[     1.000000] total memory = 256 MB
[     1.000000] (2128 KB reserved for PROM, 253 MB used by NetBSD)
[     1.000000] avail memory = 235 MB
[     1.000000] timecounter: Timecounters tick every 0.976 msec
[     1.000000] Kernelized RAIDframe activated
[     1.000000] mainbus0 (root)
[     1.000000] cpu0 at mainbus0: ID 0 (primary), 21164A-2 (EV56)
[     1.000000] cpu0: Architecture extensions: 0x1<BWX>
[     1.000000] cia0 at mainbus0: DECchip 2117x Core Logic Chipset (Pyxis), pass 2
[     1.000000] cia0: extended capabilities: 0x1<BWEN>
[     1.000000] cia0: using BWX for PCI config access
[     1.000000] pci0 at cia0 bus 0
[     1.000000] pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
[     1.000000] vga0 at pci0 dev 6 function 0: ATI Technologies Rage XL (rev. 0x27)
[     1.000000] wsdisplay1 at vga0 kbdmux 1
[     1.000000] wsmux1: connecting to wsdisplay1
[     1.000000] drm at vga0 not configured
[     1.000000] esiop0 at pci0 dev 7 function 0: Symbios Logic 53c875 (ultra-wide scsi)
[     1.000000] esiop0: using on-board RAM
[     1.000000] esiop0: interrupting at eb164 irq 1
[     1.000000] scsibus0 at esiop0: 16 targets, 8 luns per target
[     1.000000] sio0 at pci0 dev 8 function 0: Intel 82378ZB System I/O (rev. 0x43)
[     1.000000] tlp0 at pci0 dev 9 function 0: DECchip 21140A Ethernet, pass 2.2
[     1.000000] tlp0: interrupting at eb164 irq 3
[     1.000000] tlp0: Ethernet address 00:c0:f0:32:05:61
[     1.000000] inphy0 at tlp0 phy 1: i82555 10/100 media interface, rev. 1
[     1.000000] inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
[     1.000000] cmdide0 at pci0 dev 11 function 0: CMD Technology PCI0646 (rev. 0x01)
[     1.000000] cmdide0: bus-master DMA support present
[     1.000000] cmdide0: primary channel wired to compatibility mode, channel non-independent
[     1.000000] cmdide0: primary channel interrupting at isa irq 14
[     1.000000] atabus0 at cmdide0 channel 0
[     1.000000] cmdide0: secondary channel wired to compatibility mode, channel non-independent
[     1.000000] cmdide0: secondary channel interrupting at isa irq 15
[     1.000000] atabus1 at cmdide0 channel 1
[     1.000000] isa0 at sio0
[     1.000000] lpt0 at isa0 port 0x3bc-0x3bf irq 7
[     1.000000] com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, 16-byte FIFO
[     1.000000] com0: console
[     1.000000] com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, 16-byte FIFO
[     1.000000] pckbc0 at isa0 port 0x60-0x64
[     1.000000] pckbd0 at pckbc0 (kbd slot)
[     1.000000] pckbc0: using irq 1 for kbd slot
[     1.000000] wskbd0 at pckbd0 mux 1
[     1.000000] wskbd0: connecting to wsdisplay1
[     1.000000] attimer0 at isa0 port 0x40-0x43
[     1.000000] pcppi0 at isa0 port 0x61
[     1.000000] spkr0 at pcppi0: PC Speaker
[     1.000000] wsbell at spkr0 not configured
[     1.000000] midi0 at pcppi0: PC speaker
[     1.000000] isabeep0 at pcppi0
[     1.000000] fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
[     1.000000] mcclock0 at isa0 port 0x70-0x71: mc146818 compatible time-of-day clock
[     1.000000] attimer0: attached to pcppi0
[     1.000000] WARNING: system needs entropy for security; see entropy(7)
[     1.000000] timecounter: Timecounter "PCC" frequency 599810112 Hz quality 1000
[     1.000003] timecounter: Timecounter "clockinterrupt" frequency 1024 Hz quality 0
[     1.000260] scsibus0: waiting 2 seconds for devices to settle...
[     4.179905] wd0 at atabus0 drive 0
[     4.219946] wd0: <IBM-DTLA-305040>
[     4.259527] wd0: drive supports 16-sector PIO transfers, LBA addressing
[     4.259527] wd0: 39266 MB, 79780 cyl, 16 head, 63 sec, 512 bytes/sect x 80418240 sectors
[     4.357637] wd0: 32-bit data port
[     4.358614] wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
[     4.358614] wd0(cmdide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)
[     4.358614] atapibus0 at atabus1: 2 targets
[     4.413303] cd0 at atapibus0 drive 0: <TOSHIBA CD-ROM XM-6302B, , 1012> cdrom removable
[     4.507093] cd0: 32-bit data port
[     4.508029] cd0: drive supports PIO mode 4, DMA mode 2
[     4.508029] cd0(cmdide0:1:0): using PIO mode 4, DMA mode 2 (using DMA)
[     7.593927] swwdog0: software watchdog initialized
[     7.690606] root on wd0a dumps on wd0b
[     7.771654] root file system type: ffs
[     7.846850] kern.module.path=/stand/alpha/11.0/modules
[     7.923026] entropy: best effort
[    11.393680] entropy: ready
[    17.792042] tlp0: transmit underrun; new threshold: 96/256 bytes
[  2732.711250] tlp0: transmit underrun; new threshold: 128/512 bytes
[  2734.019856] tlp0: transmit underrun; new threshold: 160/1024 bytes