"4SNS/1/40000001: VMBS" Apple Hardware Test error on MP1,1

nycaleksey · Dec 31, 2013

Hi,

I have MP1,1 upgraded with X5365s. Previously it had Xeon 5130s in it. It runs 10.9 using Tiamo's boot.efi

The machine has occasional kernel panics, on average once a month (it runs 24x7 since 2009). The panic reports usually mention "Machine Check at ... / com.apple.driver.AppleIntelCPUPowerManagement"

The panics started before I changed the CPU or hacked the OS. They occur without any correlation to load or running applications - i.e. I can have it running Handbrake jobs with 100% CPU utilization for couple of days without any issue and sometimes it panics being completely idle.

When I run Apple Hardware Test, it reports "4SNS/1/40000001: VMBS" error.

Does anyone know what this error means? I did some research and there are conflicting opinions - people mention logic board failure and say that "4SNS" means some kind of sensor.

Thank you.

666sheep · Dec 31, 2013

4SNS means sensor failure/enormous read, VMBS stands for voltage memory (board?) sensor. Check memory risers voltage reads with iStat or Hardware monitor. If one will show a lot more (or less) than 12V, you have the answer.

Post also (whole) KP log here, using

Code:

 tag.

nycaleksey · Dec 31, 2013

Thank you for suggestion. I have Hardware Monitor and it shows Memory VRB Supply voltages at 11.8V both. I'm attaching the screenshot of Hardware Monitor for reference.

Here's the full typical KP log:

Code:

Anonymous UUID:       2A543D1C-BCEF-F636-1395-DA25353E6C8B

Wed Dec 25 04:56:56 2013
Machine-check capabilities 0x0000000000000806:
 family: 6 model: 15 stepping: 11 microcode: 188
 Intel(R) Xeon(R) CPU           X5365  @ 3.00GHz
 6 error-reporting banks
 threshold-based error status present
Processor 0: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 1: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 2: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 3: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 4: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 5: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 6: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 7: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
panic(cpu 6 caller 0xffffff80042dca29): "Machine Check at 0xffffff7f858366ef, registers:\n" "CR0: 0x000000008001003b, CR2: 0x0000000102546e30, CR3: 0x00000000069e0000, CR4: 0x0000000000000660\n" "RAX: 0x0000000000000000, RBX: 0xffffff80246f7000, RCX: 0x0000000000000001, RDX: 0x0000000000000000\n" "RSP: 0xffffff81d6c23d40, RBP: 0xffffff81d6c23d70, RSI: 0x0000000000000001, RDI: 0xffffff81caf44148\n" "R8:  0xffffff7f8584b120, R9:  0x0000000000000001, R10: 0xffffff81d6c23b50, R11: 0xffffff8004889ce8\n" "R12: 0x0000000000000001, R13: 0xffffff8024881bc0, R14: 0xffffff7f85853e20, R15: 0x0000000000000148\n" "RFL: 0x0000000000000046, RIP: 0xffffff7f858366ef, CS:  0x0000000000000008, SS:  0x0000000000000010\n" "Error code: 0x0000000000000000\n"@/SourceCache/xnu/xnu-2422.1.72/osfmk/i386/trap_native.c:168
Backtrace (CPU 6), Frame : Return Address
0xffffff81caec5e80 : 0xffffff8004222f69 
0xffffff81caec5f00 : 0xffffff80042dca29 
0xffffff81caec6060 : 0xffffff80042f3eaf 
0xffffff81d6c23d70 : 0xffffff7f8582f953 
0xffffff81d6c23e70 : 0xffffff7f8582eb89 
0xffffff81d6c23f30 : 0xffffff80042dda5c 
0xffffff81d6c23f50 : 0xffffff800423757a 
0xffffff81d6c23f90 : 0xffffff80042378c8 
0xffffff81d6c23fb0 : 0xffffff80042d6aa7 
      Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelCPUPowerManagement(216.0)[A6EE4D7B-228E-3A3C-95BA-10ED6F331236]@0xffffff7f8582c000->0xffffff7f85856fff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
13B42

Kernel version:
Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide:     0x0000000004000000
Kernel text base: 0xffffff8004200000
System model name: MacPro1,1 (Mac-F4208DC8)

System uptime in nanoseconds: 66418390102461
last loaded kext at 1030984306991: com.apple.filesystems.smbfs	2.0.0 (addr 0xffffff7f863bf000, size 335872)
last unloaded kext at 308474459035: com.apple.filesystems.msdosfs	1.9 (addr 0xffffff7f86352000, size 57344)
loaded kexts:
com.apple.filesystems.smbfs	2.0.0
com.apple.filesystems.afpfs	11.0
com.apple.nke.asp-tcp	8.0.0
com.apple.driver.AudioAUUC	1.60
com.apple.filesystems.autofs	3.0
com.apple.iokit.IOBluetoothSerialManager	4.2.0f6
com.apple.driver.AppleUpstreamUserClient	3.5.13
com.apple.driver.AppleMCCSControl	1.1.12
com.apple.driver.AppleHDA	2.5.3fc1
com.apple.iokit.IOUserEthernet	1.0.0d1
com.apple.kext.AMDFramebuffer	1.1.4
com.apple.Dont_Steal_Mac_OS_X	7.0.0
com.apple.driver.AppleHWAccess	1
com.apple.AMDRadeonX3000	1.1.4
com.apple.driver.AppleMCEDriver	1.1.9
com.apple.driver.AppleLPC	1.7.0
com.apple.kext.AMD5000Controller	1.1.4
com.apple.driver.ACPI_SMC_PlatformPlugin	1.0.0
com.apple.iokit.SCSITaskUserClient	3.6.0
com.apple.driver.XsanFilter	404
com.apple.iokit.IOAHCIBlockStorage	2.4.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless	1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib	1.0.0d1
com.apple.BootCache	35
com.apple.driver.AppleUSBHub	650.4.4
com.apple.driver.AppleIntel8254XEthernet	3.1.3b1
com.apple.driver.AppleFWOHCI	4.9.9
com.apple.driver.AppleAHCIPort	2.9.5
com.apple.driver.AppleIntelPIIXATA	2.5.1
com.apple.driver.AppleUSBEHCI	650.4.1
com.apple.driver.AppleUSBUHCI	650.4.0
com.apple.driver.AppleACPIButtons	2.0
com.apple.driver.AppleRTC	2.0
com.apple.driver.AppleHPET	1.8
com.apple.driver.AppleSMBIOS	2.0
com.apple.driver.AppleACPIEC	2.0
com.apple.driver.AppleAPIC	1.7
com.apple.driver.AppleIntelCPUPowerManagementClient	216.0.0
com.apple.nke.applicationfirewall	153
com.apple.security.quarantine	3
com.apple.driver.AppleIntelCPUPowerManagement	216.0.0
com.apple.security.SecureRemotePassword	1.0
com.apple.kext.triggers	1.0
com.apple.iokit.IOSerialFamily	10.0.7
com.apple.iokit.IOAHCISerialATAPI	2.6.0
com.apple.driver.AppleSMBusController	1.0.11d1
com.apple.driver.DspFuncLib	2.5.3fc1
com.apple.vecLib.kext	1.0.0
com.apple.iokit.IOAudioFamily	1.9.4fc11
com.apple.kext.OSvKernDSPLib	1.14
com.apple.iokit.IOSurface	91
com.apple.iokit.IOBluetoothFamily	4.2.0f6
com.apple.iokit.IONDRVSupport	2.3.6
com.apple.iokit.IOAcceleratorFamily	98

System Profile:
Model: MacPro1,1, BootROM MP11.005D.B00, 8 processors, 3 GHz, 16 GB, SMC 1.7f10
Graphics: ATI Radeon HD 5770, ATI Radeon HD 5770, PCIe, 1024 MB
Memory Module: DIMM Riser A/DIMM 1, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x05F7, 0x000000003732353642363145353636374600
Memory Module: DIMM Riser A/DIMM 2, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x05F7, 0x000000003732353642363145353636374600
Memory Module: DIMM Riser B/DIMM 1, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x0000, 0x000000463732353642363145353636374600
Memory Module: DIMM Riser B/DIMM 2, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x0000, 0x000000463732353642363145353636374600
Memory Module: DIMM Riser A/DIMM 3, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser A/DIMM 4, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser B/DIMM 3, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser B/DIMM 4, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Network Service: Ethernet 1, Ethernet, en0
PCI Card: ATI Radeon HD 5770, Display Controller, Slot-1
PCI Card: ATI Radeon HD 5770, ATY,HoolockParent, Slot-1
PCI Card: pci1b4b,9230, AHCI Controller, Slot-2
Serial ATA Device: MARVELL Raid VD 0, 119.88 GB
Serial ATA Device: TOSHIBA THNSNH128GBST, 128.04 GB
Serial ATA Device: SAMSUNG HD103UJ, 1 TB
Serial ATA Device: WDC WD15EARS-22MVWB0, 1.5 TB
Serial ATA Device: WDC WD15EADS-00W4B0, 1.5 TB
Serial ATA Device: MARVELL VIRTUALL
Parallel ATA Device: PIONEER DVD-RW  DVR-112D
USB Device: Keyboard Hub
USB Device: Optical USB Mouse
USB Device: Apple Keyboard
USB Device: USB 2.0 Hub [MTT]
USB Device: Fitbit Base Station
USB Device: USB 2.0 Hub
USB Device: USB2.0 Hub Controller
USB Device: MP480 series
USB Device: Smart-UPS 750 FW:UPS 06.5 / ID=18
USB Device: DM 152
FireWire Device: built-in_hub, Up to 800 Mb/sec
Thunderbolt Bus:

666sheep · Dec 31, 2013

I see that you didn't flash it to 2,1. Some users experienced such KPs with 5365 and 1,1 firmware (it isn't general rule, but happens). Flashing to 2,1 was the remedy. Head over to netkas forum to DL firmware updater for 1,1.

nycaleksey · Dec 31, 2013

Unfortunately I have a rare breed of MP1,1 with firmware MP11.005D.B00 and it cannot be upgraded to 2,1.

As I said earlier, I had these panics while running on stock 5130s, so I don't think it is caused by EFI/CPU incompatibility, although it may be the case.

nycaleksey · Dec 31, 2013

Turns out there is a way to upgrade my MP1,1 to 2,1 firmware (http://forum.netkas.org/index.php/topic,1094.msg10063.html#msg10063)

I just performed an upgrade and now run my machine on 2,1 EFI. I'll report in this thread if I still see the panics.

nycaleksey · Jan 6, 2014

Got another kernel panic this night, when the machine was completely idle. This time with the latest firmware applied. Here it is:

Code:

Anonymous UUID:       2A543D1C-BCEF-F636-1395-DA25353E6C8B

Mon Jan  6 04:38:41 2014
Machine-check capabilities 0x0000000000000806:
 family: 6 model: 15 stepping: 11 microcode: 188
 Intel(R) Xeon(R) CPU           X5365  @ 3.00GHz
 6 error-reporting banks
 threshold-based error status present
Processor 0: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 1: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 2: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 3: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 4: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 5: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200001080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000010
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 6: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000084200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8420
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
Processor 7: machine-check status 0x0000000000000005:
 restart IP valid
 machine-check in progress
MCA error-reporting registers:
 IA32_MC0_STATUS(0x401): 0x1000000020000000 invalid
 IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
 IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
 IA32_MC3_STATUS(0x40d): 0x0020000000000000 invalid
 IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
 IA32_MC5_STATUS(0x415): 0xb200000080200e0f valid
  MCA error code:            0x0e0f
  Model specific error code: 0x8020
  Other information:         0x00000000
  Threshold-based status:    Undefined
  Status bits:
   Processor context corrupt
   Error enabled
   Uncorrected error
panic(cpu 5 caller 0xffffff801a8dca29): "Machine Check at 0xffffff7f9be846ef, registers:\n" "CR0: 0x000000008001003b, CR2: 0x000000010207fe78, CR3: 0x000000001d452000, CR4: 0x0000000000000660\n" "RAX: 0x0000000000000000, RBX: 0xffffff803b714000, RCX: 0x0000000000000001, RDX: 0x0000000000000000\n" "RSP: 0xffffff81eb1cbd40, RBP: 0xffffff81eb1cbd70, RSI: 0x0000000000000001, RDI: 0xffffff81e1999148\n" "R8:  0xffffff7f9be99120, R9:  0x0000000000000001, R10: 0xffffff81eb1cbd80, R11: 0x0000000000000202\n" "R12: 0x0000000000000001, R13: 0xffffff803b89e6c0, R14: 0xffffff7f9bea1e20, R15: 0x0000000000000148\n" "RFL: 0x0000000000000046, RIP: 0xffffff7f9be846ef, CS:  0x0000000000000008, SS:  0x0000000000000010\n" "Error code: 0x0000000000000000\n"@/SourceCache/xnu/xnu-2422.1.72/osfmk/i386/trap_native.c:168
Backtrace (CPU 5), Frame : Return Address
0xffffff81e19a8e80 : 0xffffff801a822f69 
0xffffff81e19a8f00 : 0xffffff801a8dca29 
0xffffff81e19a9060 : 0xffffff801a8f3eaf 
0xffffff81eb1cbd70 : 0xffffff7f9be7d953 
0xffffff81eb1cbe70 : 0xffffff7f9be7cb89 
0xffffff81eb1cbf30 : 0xffffff801a8dda5c 
0xffffff81eb1cbf50 : 0xffffff801a83757a 
0xffffff81eb1cbf90 : 0xffffff801a8378c8 
0xffffff81eb1cbfb0 : 0xffffff801a8d6aa7 
      Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelCPUPowerManagement(216.0)[A6EE4D7B-228E-3A3C-95BA-10ED6F331236]@0xffffff7f9be7a000->0xffffff7f9bea4fff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
13B42

Kernel version:
Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide:     0x000000001a600000
Kernel text base: 0xffffff801a800000
System model name: MacPro2,1 (Mac-F4208DC8)

System uptime in nanoseconds: 107825485791551
last loaded kext at 92773594914770: com.apple.filesystems.msdosfs	1.9 (addr 0xffffff7f9c9d1000, size 65536)
last unloaded kext at 95874021089705: com.apple.iokit.IOUSBMassStorageClass	3.6.0 (addr 0xffffff7f9c9a8000, size 69632)
loaded kexts:
com.owc.driver.Accelsior	1.0 b2
at.obdev.nke.LittleSnitch	4052
com.apple.filesystems.smbfs	2.0.0
com.apple.driver.AudioAUUC	1.60
com.apple.filesystems.autofs	3.0
com.apple.iokit.IOBluetoothSerialManager	4.2.0f6
com.apple.driver.AppleUpstreamUserClient	3.5.13
com.apple.driver.AppleMCCSControl	1.1.12
com.apple.driver.AppleHDA	2.5.3fc1
com.apple.kext.AMDFramebuffer	1.1.4
com.apple.iokit.IOUserEthernet	1.0.0d1
com.apple.AMDRadeonX3000	1.1.4
com.apple.kext.AMD5000Controller	1.1.4
com.apple.driver.AppleMCEDriver	1.1.9
com.apple.driver.AppleLPC	1.7.0
com.apple.driver.ACPI_SMC_PlatformPlugin	1.0.0
com.apple.Dont_Steal_Mac_OS_X	7.0.0
com.apple.driver.AppleHWAccess	1
com.apple.iokit.SCSITaskUserClient	3.6.0
com.apple.driver.XsanFilter	404
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless	1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib	1.0.0d1
com.apple.BootCache	35
com.apple.iokit.IOAHCIBlockStorage	2.4.0
com.apple.driver.AppleUSBHub	650.4.4
com.apple.driver.AppleIntel8254XEthernet	3.1.3b1
com.apple.driver.AppleFWOHCI	4.9.9
com.apple.driver.AppleAHCIPort	2.9.5
com.apple.driver.AppleIntelPIIXATA	2.5.1
com.apple.driver.AppleUSBEHCI	650.4.1
com.apple.driver.AppleUSBUHCI	650.4.0
com.apple.driver.AppleACPIButtons	2.0
com.apple.driver.AppleRTC	2.0
com.apple.driver.AppleHPET	1.8
com.apple.driver.AppleSMBIOS	2.0
com.apple.driver.AppleACPIEC	2.0
com.apple.driver.AppleAPIC	1.7
com.apple.driver.AppleIntelCPUPowerManagementClient	216.0.0
com.apple.nke.applicationfirewall	153
com.apple.security.quarantine	3
com.apple.driver.AppleIntelCPUPowerManagement	216.0.0
com.apple.kext.triggers	1.0
com.apple.iokit.IOSerialFamily	10.0.7
com.apple.iokit.IOAHCISerialATAPI	2.6.0
com.apple.driver.AppleSMBusController	1.0.11d1
com.apple.driver.DspFuncLib	2.5.3fc1
com.apple.vecLib.kext	1.0.0
com.apple.iokit.IOAudioFamily	1.9.4fc11
com.apple.kext.OSvKernDSPLib	1.14
com.apple.iokit.IONDRVSupport	2.3.6
com.apple.iokit.IOAcceleratorFamily	98.7.1
com.apple.iokit.IOSurface	91
com.apple.iokit.IOFireWireIP	2
Model: MacPro2,1, BootROM MP21.007F.B06, 8 processors, Quad-Core Intel Xeon, 3 GHz, 16 GB, SMC 1.7f10
Graphics: ATI Radeon HD 5770, ATI Radeon HD 5770, PCIe, 1024 MB
Memory Module: DIMM Riser A/DIMM 1, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x05F7, 0x000000003732353642363145353636374600
Memory Module: DIMM Riser A/DIMM 2, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x05F7, 0x000000003732353642363145353636374600
Memory Module: DIMM Riser B/DIMM 1, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x0000, 0x000000463732353642363145353636374600
Memory Module: DIMM Riser B/DIMM 2, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x0000, 0x000000463732353642363145353636374600
Memory Module: DIMM Riser A/DIMM 3, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser A/DIMM 4, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser B/DIMM 3, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Memory Module: DIMM Riser B/DIMM 4, 2 GB, DDR2 FB-DIMM, 667 MHz, 0x8551, 0x373254323536343230454641335342322020
Network Service: Ethernet 1, Ethernet, en0
PCI Card: ATI Radeon HD 5770, Display Controller, Slot-1
PCI Card: ATI Radeon HD 5770, ATY,HoolockParent, Slot-1
PCI Card: pci1b4b,9230, AHCI Controller, Slot-4
Serial ATA Device: TOSHIBA THNSNH128GBST, 128.04 GB
Serial ATA Device: SAMSUNG HD103UJ, 1 TB
Serial ATA Device: WDC WD15EARS-22MVWB0, 1.5 TB
Serial ATA Device: WDC WD15EADS-00W4B0, 1.5 TB
Serial ATA Device: MARVELL Raid VD 0, 119.88 GB
Serial ATA Device: MARVELL VIRTUALL
Parallel ATA Device: PIONEER DVD-RW  DVR-112D
USB Device: Keyboard Hub
USB Device: Optical USB Mouse
USB Device: Apple Keyboard
USB Device: USB 2.0 Hub [MTT]
USB Device: USB 2.0 Hub
USB Device: iPhone
USB Device: Fitbit Base Station
FireWire Device: built-in_hub, Up to 800 Mb/sec
Thunderbolt Bus:

Does anyone know what this panic report mean?

Thank you.

666sheep · Jan 6, 2014

Machine check with uncorrected ECC errors point at RAM. I should have been told you this right after you've posted first log, but this VMBS AHT error has misleaded me a bit.
Try to remove some RAM and see if issue will persist. You can also DL memtestx86 bootable ISO and test RAM using it.

nycaleksey · Jan 14, 2014

I have run memtest86 overnight and it finished without detecting any errors in the RAM.

So, the panic error message means that the cause of the panic was some sort of RAM error / corruption ?

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"4SNS/1/40000001: VMBS" Apple Hardware Test error on MP1,1

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