As I was not able to find information on this, I thought I'd post it here for others.
While I was unable to boot from a USB stick, I did manage to boot the machine from a USB CD/DVD drive using the rear USB ports. Please note that I have not used the system "in anger" (though I plan to, later in the year); I installed from cd53.iso, installed & ran bonnie, and gave it back to the folks who will be installing some other OS on it. Hence, the usefulness of this "report" may be somewhat lacking. Here is the dmesg: OpenBSD 5.3 (GENERIC.MP) #62: Tue Mar 12 18:21:20 MDT 2013 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP RTC BIOS diagnostic error 80<clock_battery> real mem = 17152110592 (16357MB) avail mem = 16673026048 (15900MB) mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.7 @ 0x7e7be000 (86 entries) bios0: vendor IBM version "-[VVE124AUS-1.30]-" date 11/21/2012 bios0: IBM 00Y8494 acpi0 at bios0: rev 2 acpi0: sleep states S0 S5 acpi0: tables DSDT FACP TCPA ERST HEST HPET APIC MCFG OEM0 OEM1 SLIT SRAT SLIC SSDT SSDT SSDT SSDT SSDT SSDT SSDT DMAR acpi0: wakeup devices MRP1(S4) DCC0(S4) ENET(S4) MRP3(S4) MRP5(S4) EHC2(S5) PEX0(S5) PEX7(S5) EHC1(S5) IP2P(S3) MRPB(S4) MRPC(S4) MRPD(S4) MRPM(S4) MRPE(S4) MRPF(S4) MRPG(S4) MRPH(S4) MRPI(S4) MRPJ(S4) MRPK(S4) MRPL(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.29 MHz cpu0: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu0: 256KB 64b/line 8-way L2 cache cpu0: apic clock running at 99MHz cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu1: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu1: 256KB 64b/line 8-way L2 cache cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu2: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu2: 256KB 64b/line 8-way L2 cache cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu3: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu3: 256KB 64b/line 8-way L2 cache cpu4 at mainbus0: apid 32 (application processor) cpu4: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu4: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu4: 256KB 64b/line 8-way L2 cache cpu5 at mainbus0: apid 34 (application processor) cpu5: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu5: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu5: 256KB 64b/line 8-way L2 cache cpu6 at mainbus0: apid 36 (application processor) cpu6: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu6: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu6: 256KB 64b/line 8-way L2 cache cpu7 at mainbus0: apid 38 (application processor) cpu7: Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz, 2400.00 MHz cpu7: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC cpu7: 256KB 64b/line 8-way L2 cache ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins ioapic1 at mainbus0: apid 9 pa 0xfec01000, version 20, 24 pins ioapic2 at mainbus0: apid 10 pa 0xfec40000, version 20, 24 pins acpimcfg0 at acpi0 addr 0x80000000, bus 0-255 acpiprt0 at acpi0: bus 0 (IOH0) acpiprt1 at acpi0: bus 12 (MRP1) acpiprt2 at acpi0: bus 17 (DCC0) acpiprt3 at acpi0: bus 22 (ENET) acpiprt4 at acpi0: bus 27 (MRP3) acpiprt5 at acpi0: bus 32 (MRP5) acpiprt6 at acpi0: bus 6 (PEX0) acpiprt7 at acpi0: bus 128 (IOH1) acpiprt8 at acpi0: bus 134 (MRPD) acpiprt9 at acpi0: bus 139 (MRPM) acpiprt10 at acpi0: bus 144 (MRPE) acpicpu0 at acpi0: C3, C2, C1, PSS acpicpu1 at acpi0: C3, C2, C1, PSS acpicpu2 at acpi0: C3, C2, C1, PSS acpicpu3 at acpi0: C3, C2, C1, PSS acpicpu4 at acpi0: C3, C2, C1, PSS acpicpu5 at acpi0: C3, C2, C1, PSS acpicpu6 at acpi0: C3, C2, C1, PSS acpicpu7 at acpi0: C3, C2, C1, PSS ipmi at mainbus0 not configured cpu0: Enhanced SpeedStep 2400 MHz: speeds: 2400, 2300, 2200, 2100, 2000, 1900, 1800, 1700, 1600, 1500, 1400, 1300, 1200 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel E5 Host" rev 0x07 ppb0 at pci0 dev 1 function 0 "Intel E5 PCIE" rev 0x07: msi pci1 at ppb0 bus 12 ppb1 at pci0 dev 2 function 0 "Intel E5 PCIE" rev 0x07: msi pci2 at ppb1 bus 17 ppb2 at pci0 dev 2 function 2 "Intel E5 PCIE" rev 0x07 pci3 at ppb2 bus 22 mfii0 at pci3 dev 0 function 0 "Symbios Logic MegaRAID SAS2208" rev 0x05: apic 9 int 10 mfii0: "ServeRAID M5110e", firmware 23.7.1-0010, 512MB cache scsibus0 at mfii0: 64 targets sd0 at scsibus0 targ 0 lun 0: <IBM, ServeRAID M5110e, 3.19> SCSI3 0/direct fixed naa.600507605807238019714cb90f632a54 sd0: 285148MB, 512 bytes/sector, 583983104 sectors ppb3 at pci0 dev 3 function 0 "Intel E5 PCIE" rev 0x07: msi pci4 at ppb3 bus 27 ppb4 at pci0 dev 3 function 2 "Intel E5 PCIE" rev 0x07: msi pci5 at ppb4 bus 32 em0 at pci5 dev 0 function 0 "Intel I340-T2 (82580)" rev 0x01: msi, address 90:e2:ba:43:4e:4a em1 at pci5 dev 0 function 1 "Intel I340-T2 (82580)" rev 0x01: msi, address 90:e2:ba:43:4e:4b "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 0 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 1 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 2 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 3 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 4 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 5 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 6 not configured "Intel E5 DMA" rev 0x07 at pci0 dev 4 function 7 not configured "Intel E5 Address Map" rev 0x07 at pci0 dev 5 function 0 not configured "Intel E5 Error Reporting" rev 0x07 at pci0 dev 5 function 2 not configured ppb5 at pci0 dev 17 function 0 "Intel C600 Virtual PCIE" rev 0x06 pci6 at ppb5 bus 37 ehci0 at pci0 dev 26 function 0 "Intel C600 USB" rev 0x06: apic 8 int 16 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb6 at pci0 dev 28 function 0 "Intel C600 PCIE" rev 0xb6: msi pci7 at ppb6 bus 6 em2 at pci7 dev 0 function 0 "Intel I350" rev 0x01: msi, address 6c:ae:8b:3d:23:82 em3 at pci7 dev 0 function 1 "Intel I350" rev 0x01: msi, address 6c:ae:8b:3d:23:83 em4 at pci7 dev 0 function 2 "Intel I350" rev 0x01: msi, address 6c:ae:8b:3d:23:84 em5 at pci7 dev 0 function 3 "Intel I350" rev 0x01: msi, address 6c:ae:8b:3d:23:85 ppb7 at pci0 dev 28 function 7 "Intel C600 PCIE" rev 0xb6: msi pci8 at ppb7 bus 1 ppb8 at pci8 dev 0 function 0 "Renesas SH7757 PCIE Switch" rev 0x00 pci9 at ppb8 bus 2 ppb9 at pci9 dev 0 function 0 "Renesas SH7757 PCIE Switch" rev 0x00 pci10 at ppb9 bus 3 ppb10 at pci10 dev 0 function 0 "Renesas SH7757 PCIE-PCI" rev 0x00 pci11 at ppb10 bus 4 vga1 at pci11 dev 0 function 0 "Matrox MGA G200eR" rev 0x00 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) ppb11 at pci9 dev 1 function 0 "Renesas SH7757 PCIE Switch" rev 0x00 pci12 at ppb11 bus 5 ehci1 at pci0 dev 29 function 0 "Intel C600 USB" rev 0x06: apic 8 int 23 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb12 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xa6 pci13 at ppb12 bus 38 pcib0 at pci0 dev 31 function 0 "Intel C600 LPC" rev 0x06 ichiic0 at pci0 dev 31 function 3 "Intel C600 SMBus" rev 0x06: apic 8 int 11 iic0 at ichiic0 isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo com1 at isa0 port 0x2f8/8 irq 3: 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 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 pci14 at mainbus0 bus 128 ppb13 at pci14 dev 0 function 0 vendor "Intel", unknown product 0x3c01 rev 0x07 pci15 at ppb13 bus 129 ppb14 at pci14 dev 2 function 0 "Intel E5 PCIE" rev 0x07: msi pci16 at ppb14 bus 134 ppb15 at pci14 dev 2 function 2 "Intel E5 PCIE" rev 0x07: msi pci17 at ppb15 bus 139 ppb16 at pci14 dev 3 function 0 "Intel E5 PCIE" rev 0x07: msi pci18 at ppb16 bus 144 "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 0 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 1 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 2 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 3 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 4 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 5 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 6 not configured "Intel E5 DMA" rev 0x07 at pci14 dev 4 function 7 not configured "Intel E5 Address Map" rev 0x07 at pci14 dev 5 function 0 not configured "Intel E5 Error Reporting" rev 0x07 at pci14 dev 5 function 2 not configured mtrr: Pentium Pro MTRR support uhub2 at uhub0 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 umass0 at uhub2 port 4 configuration 1 interface 0 "USB2.0 External Mass Storage Device" rev 2.00/0.01 addr 3 umass0: using SCSI over Bulk-Only scsibus1 at umass0: 2 targets, initiator 0 cd0 at scsibus1 targ 1 lun 0: <Slimtype, DVDRW SOSW-852S, PSX3> SCSI0 5/cdrom removable serial.0ecd40c0DEF1091D30B4 uhidev0 at uhub2 port 5 configuration 1 interface 0 "Logitech Trackball" rev 1.10/2.20 addr 4 uhidev0: iclass 3/1 ums0 at uhidev0: 3 buttons, Z dir wsmouse0 at ums0 mux 0 uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uhub4 at uhub3 port 1 "no manufacturer Gadget USB HUB" rev 2.00/0.00 addr 3 uhub4: device problem, disabling port 5 uhidev1 at uhub3 port 3 configuration 1 interface 0 "Holtek product 0x1203" rev 2.00/2.60 addr 4 uhidev1: iclass 3/1 ukbd0 at uhidev1: 8 variable keys, 6 key codes wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev2 at uhub3 port 3 configuration 1 interface 1 "Holtek product 0x1203" rev 2.00/2.60 addr 4 uhidev2: iclass 3/0, 2 report ids uhid0 at uhidev2 reportid 1: input=1, output=0, feature=0 uhid1 at uhidev2 reportid 2: input=3, output=0, feature=0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on sd0a (fdcda471015a8160.a) swap on sd0b dump on sd0b urndis0 at uhub4 port 5 configuration 2 interface 0 "IBM RNDIS/Ethernet Gadget" rev 2.00/3.25 addr 5 urndis0: using Vendor, address 6e:ae:8b:3d:23:81 I also include a quick default bonnie run: -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 100 243287 99.8 933693 100.3 1849243 90.3 258959 98.6 5123330 100.1 277315.6 277.3 Regards, Tor