Hello When booting with the standard kernel everything works fine and I can login/use the machine, run stress without any errors.
When booting with the MP kernel it will get to mounting the drive and freeze, partial boot log below of where the error occurs. I have tested this with AMD64/i386 of 3.8 and the AMD64 snapshot 24 Jan 2006. I had a go at using config to change the flags on the wd* device to force it to use PIO mode (0xff0). This did not change anything. The mother board is a ASUS A8N5X and it has 2 WDB800JD (80GB SATA) disks. I have seen similar problems in the archives although none where the machine freezes after the disk errors. Is there any other information that would help or any suggestions on what to try next? Thanks Nich Partial dmesg from MP boot of 3.8: ... lpt0 at isa0 port 0x378/4 irq 7 it0 at isa0 port 0x290/8: IT87 wd0(pciide2:0:0): timeout type: ata c_bcount: 512 c_skip: 0 wd0(pciide2:0:0): timeout type: ata c_bcount: 512 c_skip: 0 Full dmesg from AMD64 3.8: OpenBSD 3.8 (GENERIC) #247: Sat Sep 10 15:53:26 MDT 2005 [EMAIL PROTECTED]:/usr/src/sys/arch/amd64/compile/GENERIC real mem = 1073278976 (1048124K) avail mem = 909139968 (887832K) using 22937 buffers containing 107536384 bytes (105016K) of memory mainbus0 (root) cpu0 at mainbus0: (uniprocessor) cpu0: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+, 2010.53 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,NXE,MMXX,FFXSR,LONG,3DNOW2,3DNOW cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line 16-way L2 cache cpu0: ITLB 32 4KB entries fully associative, 8 4MB entries fully associative cpu0: DTLB 32 4KB entries fully associative, 8 4MB entries fully associative pci0 at mainbus0 bus 0: configuration mode 1 "Nvidia nForce4 DDR" rev 0xa3 at pci0 dev 0 function 0 not configured "Nvidia nForce4 ISA" rev 0xa3 at pci0 dev 1 function 0 not configured "Nvidia nForce4 SMBus" rev 0xa2 at pci0 dev 1 function 1 not configured ohci0 at pci0 dev 2 function 0 "Nvidia nForce4 USB" rev 0xa2: irq 11, version 1.0, legacy support usb0 at ohci0: USB revision 1.0 uhub0 at usb0 uhub0: Nvidia OHCI root hub, rev 1.00/1.00, addr 1 uhub0: 10 ports with 10 removable, self powered ehci0 at pci0 dev 2 function 1 "Nvidia nForce4 USB" rev 0xa3: irq 5 usb1 at ehci0: USB revision 2.0 uhub1 at usb1 uhub1: Nvidia EHCI root hub, rev 2.00/1.00, addr 1 uhub1: 10 ports with 10 removable, self powered auich0 at pci0 dev 4 function 0 "Nvidia nForce4 AC97" rev 0xa2: irq 5, nForce4 AC97 ac97: codec id 0x414c4790 (Avance Logic ALC850) audio0 at auich0 pciide0 at pci0 dev 6 function 0 "Nvidia nForce4 IDE" rev 0xf2: 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: <AOPEN, DVD1648/AAP PRO, 1.03> SCSI0 5/cdrom removable cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4 pciide0: channel 1 disabled (no drives) pciide1 at pci0 dev 7 function 0 "Nvidia nForce4 SATA 1" rev 0xf3: DMA pciide1: using irq 11 for native-PCI interrupt pciide2 at pci0 dev 8 function 0 "Nvidia nForce4 SATA 2" rev 0xf3: DMA pciide2: using irq 5 for native-PCI interrupt wd0 at pciide2 channel 0 drive 0: <WDC WD800JD-08LSA0> wd0: 16-sector PIO, LBA48, 76324MB, 156312576 sectors wd0(pciide2:0:0): using PIO mode 4, Ultra-DMA mode 5 wd1 at pciide2 channel 1 drive 0: <WDC WD800JD-00LSA0> wd1: 16-sector PIO, LBA48, 76319MB, 156301488 sectors wd1(pciide2:1:0): using PIO mode 4, Ultra-DMA mode 5 ppb0 at pci0 dev 9 function 0 "Nvidia nForce4 PCI-PCI" rev 0xa2 pci1 at ppb0 bus 5 fxp0 at pci1 dev 6 function 0 "Intel 82557" rev 0x08, i82559: irq 3, address 00:90:27:fe:23:3d inphy0 at fxp0 phy 1: i82555 10/100 PHY, rev. 4 vga1 at pci1 dev 8 function 0 "S3 868" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) "Nvidia CK804 LAN" rev 0xa3 at pci0 dev 10 function 0 not configured ppb1 at pci0 dev 11 function 0 "Nvidia nForce4 PCIE" rev 0xa3 pci2 at ppb1 bus 4 ppb2 at pci0 dev 12 function 0 "Nvidia nForce4 PCIE" rev 0xa3 pci3 at ppb2 bus 3 ppb3 at pci0 dev 13 function 0 "Nvidia nForce4 PCIE" rev 0xa3 pci4 at ppb3 bus 2 ppb4 at pci0 dev 14 function 0 "Nvidia nForce4 PCIE" rev 0xa3 pci5 at ppb4 bus 1 pchb0 at pci0 dev 24 function 0 "AMD AMD64 HyperTransport" rev 0x00 pchb1 at pci0 dev 24 function 1 "AMD AMD64 Address Map" rev 0x00 pchb2 at pci0 dev 24 function 2 "AMD AMD64 DRAM Cfg" rev 0x00 pchb3 at pci0 dev 24 function 3 "AMD AMD64 Misc Cfg" rev 0x00 isa0 at mainbus0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo 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 pmsi0 at pckbc0 (aux slot) pckbc0: using irq 12 for aux slot wsmouse0 at pmsi0 mux 0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 sysbeep0 at pcppi0 lpt0 at isa0 port 0x378/4 irq 7 it0 at isa0 port 0x290/8: IT87 dkcsum: wd0 matches BIOS drive 0x80 wd1: no disk label dkcsum: wd1 matches BIOS drive 0x81 root on wd0a rootdev=0x0 rrootdev=0x300 rawdev=0x302