Off list someone advised me that r1.62 of src/sys/dev/ata/atascsi.c might have fixed this. I built an i386 RAMDISK_CD kernel from freshly updated CVS HEAD with that updated file and recreated cd43.iso with the new bsd.rd. The problem persisted on the new boot cd. I've attached a console log obtained through kermit. I'll try amd64 again when ftp.openbsd.org has post-2008-05-05 snapshots.
Brad Walker >> OpenBSD/i386 CDBOOT 2.02 boot> booting cd0a:/4.3/i386/bsd.rd: |/-\|/-5398068\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\! |/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/! -\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-! \|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|! /-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-! \|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-+873208\| [52/+190912-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\+176922|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-]=0x654fb0 entry point at 0x200120 Copyright (c) 1982, 1986, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. Copyright (c) 1995-2008 OpenBSD. All rights reserved. http://www.OpenBSD.org OpenBSD 4.3-current (RAMDISK_CD) #0: Sun May 11 03:09:05 MDT 2008 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/RAMDISK_CD cpu0: Intel(R) Core(TM)2 Duo CPU L7500 @ 1.60GHz ("GenuineIntel" 686-class) 1.60 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,CX16,xTPR real mem = 3211005952 (3062MB) avail mem = 3112685568 (2968MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 01/22/08, BIOS32 rev. 0 @ 0xfdc80, SMBIOS rev. 2.4 @ 0xe0010 (63 entries) bios0: vendor LENOVO version "7NETA7WW (2.07 )" date 01/22/2008 bios0: LENOVO 7668CTO acpi0 at bios0: rev 2, can't enable ACPI bios0: ROM list: 0xc0000/0x10000! 0xd0000/0x1000 0xd1000/0x1000 0xd2000/0x3000! 0xe0000/0x10000! cpu0 at mainbus0 pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 "Intel GM965 Host" rev 0x0c vga1 at pci0 dev 2 function 0 "Intel GM965 Video" rev 0x0c wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) "Intel GM965 Video" rev 0x0c at pci0 dev 2 function 1 not configured em0 at pci0 dev 25 function 0 "Intel ICH8 IGP M AMT" rev 0x03: irq 11, address 00:16:d3:c8:60:38 uhci0 at pci0 dev 26 function 0 "Intel 82801H USB" rev 0x03: irq 11 uhci1 at pci0 dev 26 function 1 "Intel 82801H USB" rev 0x03: irq 11 ehci0 at pci0 dev 26 function 7 "Intel 82801H USB" rev 0x03: irq 11 ehci0: timed out waiting for BIOS usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 "Intel 82801H HD Audio" rev 0x03 at pci0 dev 27 function 0 not configured ppb0 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev 0x03: irq 11 pci1 at ppb0 bus 2 "Intel Turbo Memory" rev 0x01 at pci1 dev 0 function 0 not configured ppb1 at pci0 dev 28 function 1 "Intel 82801H PCIE" rev 0x03: irq 11 pci2 at ppb1 bus 3 iwn0 at pci2 dev 0 function 0 "Intel Wireless WiFi Link 4965AGN" rev 0x61: irq 11, MoW1, address 00:13:e8:6d:a4:17 uhci2 at pci0 ev 29 function 0 "Intel 82801H USB" rev 0x03: irq 10 uhci3 at pci0 dev 29 function 1 "Intel 82801H USB" rev 0x03: irq 11 ehci1 at pci0 dev 29 function 7 "Intel 82801H USB" rev 0x03: irq 11 ehci1: timed out waiting for BIOS usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb2 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xf3 pci3 at ppb2 bus 5 cbb0 at pci3 dev 0 function 0 "Ricoh 5C476 CardBus" rev 0xba: irq 10 "Ricoh 5C822 SD/MMC" rev 0x21 at pci3 dev 0 function 2 not configured cardslot0 at cbb0 slot 0 flags 0 cardbus0 at cardslot0: bus 6 device 0 cacheline 0x0, lattimer 0xb0 pcmcia0 at cardslot0 pcib0 at pci0 dev 31 function 0 "Intel 82801HEM LPC" rev 0x03 pciide0 at pci0 dev 31 function 1 "Intel 82801HBM IDE" rev 0x03: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility atapiscsi0 at pciide0 channel 0 drive 0 scsibus0 at atapiscsi0: 2 targets cd0 at scsibus0 targ 0 lun 0: <MATSHITA, UJDA765 DVD/CDRW, 1.70> ATAPI 5/cdrom removable cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 pciide0: channel 1 ignored (disabled) ahci0 at pci0 dev 31 function 2 "Intel 82801HBM AHCI" rev 0x03: irq 10, AHCI 1.1 scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, MTRON MSD-SATA30, 0.16> SCSI3 0/direct fixed sd0: 15260MB, 1945 cyl, 255 head, 63 sec, 512 bytes/sec, 31252480 sec total "Intel 82801H SMBus" rev 0x03 at pci0 dev 31 function 3 not configured usb2 at uhci0: USB revision 1.0 uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb3 at uhci1: USB revision 1.0 uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb4 at uhci2: USB revision 1.0 uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb5 at uhci3: USB revision 1.0 uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1 isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard, using wsdisplay0 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo pccom0: console biomask ffed netmask ffed ttymask ffef rd0: fixed, 3800 blocks uhub6 at uhub0 port 4 "vendor 0x17ef product 0x1000" rev 2.00/0.01 addr 2 "STMicroelectronics Biometric Coprocessor" rev 1.00/0.01 addr 2 at uhub2 port 2 not configured ahci0: device didn't come ready after reset, TFD: 0x8451<ERR>