Mac hard resets when mounting external HD

This forum is to find answers to problems you may be having with ZEVO Community Edition.

Moderators: jhartley, MSR734, nola

Re: Mac hard resets when mounting external HD

Post by collegeitdept » Tue Nov 13, 2012 10:33 am

Well I pray that it works. I really would like to retrieve my data.

If it doesn't, is my data gone forever?
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Posts: 89
Joined: Tue Oct 02, 2012 6:59 pm

data recovery, Winstars Communicator C2 and alternatives

Post by grahamperrin » Tue Nov 13, 2012 10:19 pm

Not specific to ZEVO or ZFS, for data recovery I would steer you:


I recommend CnW without hesitation, based on personal experience – recovery of as much data as possible from a good disk, where perfect data was overwritten without warning by a design flaw in Microsoft Windows. CnW also handled a different disk for a colleague at work.

I can't recall when or how I first learnt of Retrodata, but in 2007 I shared a page Apple Seagate Flaw | RETRODATA with a few colleagues who used Apple laptops. In Then in summer 2012 there was very sudden and (probably) total failure of the Apple-supplied drive in my 2009 MacBookPro5,2. Highlights from a Retrodata page remind me that this class of drive typically fails with severe media damage, rendering data recovery impossible. My 2012 correspondence with Retrodata began following a suggestion from Michael at CNW. Also note that in the experience of Retrodata, in 2010:

  • Western Digital hard drives were downgraded from ugly to downright ugly

– but still, let's be hopeful about your own WD disk; see below.

Graham wrote:I would not recommend Winstars Communicator C2 docking station


I'm now less hesitant about that product. In the past few hours a Communicator C2 has given very good results with a friend's disk that had been knocked off a table. In its original enclosure, his disk span up for only a short while – not long enough to be recognisable to my MacBoook Pro. The accompanying noises made me suspect physical damage to the heads or platters. Now, happily: without its original enclosure – with the C2 – all data that I wished to copy has been copied, apparently without error, to a different disk.

Back to your Western Digital disk

If the cost of an adapter or docking station is not prohibitive, give it a go.
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Location: Brighton and Hove, United Kingdom

Re: Mac hard resets when mounting external HD

Post by collegeitdept » Wed Nov 14, 2012 12:53 am

Well because this is clearly not a power supply issue (i used a brand new power adapter)... is this a USB issue?

If it is a USB does that make this more hopeful? Is the UBS host on the external case or on the drive?
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Joined: Tue Oct 02, 2012 6:59 pm

Re: Mac hard resets when mounting external HD

Post by collegeitdept » Wed Nov 14, 2012 2:46 am

If this fails... let's pray that it won't... do you know any data recovery services in the United States that won't cost an arm & a leg?
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Joined: Tue Oct 02, 2012 6:59 pm

video on YouTube

Post by grahamperrin » Wed Nov 14, 2012 4:00 am

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Posts: 1596
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Location: Brighton and Hove, United Kingdom

cp->cv_waiters & CV_WAITERS_MASK

Post by grahamperrin » Sun Nov 25, 2012 6:09 am

At viewtopic.php?p=2663#p2663 on 2012-11-08:

collegeitdept wrote:… log files …


For reference, here are contents of the two .panic files from that collection. As far as I can tell, to date, the following phrase is found in this topic alone:

cp->cv_waiters & CV_WAITERS_MASK

Kernel_2012-11-06-213639_Administrators-Mac-mini.panic

Code: Select all
Interval Since Last Panic Report:  143 sec
Panics Since Last Report:          1
Anonymous UUID:                    C30B6220-08EE-413D-A5A6-72E931A977E4

Tue Nov  6 21:36:39 2012
panic(cpu 1 caller 0xffffff7fb19b58a3): "/staging/zevo-community-edition/src/uts/darwin/os/condvar.c:61 ZFS assertion failed: (cp->cv_waiters & CV_WAITERS_MASK) == 0"@/staging/zevo-community-edition/src/uts/darwin/os/printf.c:43
Backtrace (CPU 1), Frame : Return Address
0xffffff80af96bd60 : 0xffffff802fe1d5f6
0xffffff80af96bdd0 : 0xffffff7fb19b58a3
0xffffff80af96bde0 : 0xffffff7fb19c4756
0xffffff80af96be00 : 0xffffff7fb19ae5ab
0xffffff80af96be20 : 0xffffff7fb19c16c7
0xffffff80af96be70 : 0xffffff7fb1a4b1f6
0xffffff80af96bef0 : 0xffffff7fb1a47a31
0xffffff80af96bf30 : 0xffffff7fb19b8d78
0xffffff80af96bfb0 : 0xffffff802feb2677
      Kernel Extensions in backtrace:
         com.getgreenbytes.filesystem.zfs(2012.9.14)[8241F82D-269B-30AD-86AB-AB7C3D520F2B]@0xffffff7fb19aa000->0xffffff7fb1b46fff
            dependency: com.apple.iokit.IOStorageFamily(1.8)[A3CC4E44-8E10-3D9A-BA8E-95743E79D125]@0xffffff7fb0379000

BSD process name corresponding to current thread: kernel_task

Mac OS version:
12A269

Kernel version:
Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
Kernel UUID: 8D5F8EF3-9D12-384B-8070-EF2A49C45D24
Kernel slide:     0x000000002fc00000
Kernel text base: 0xffffff802fe00000
System model name: Macmini5,1 (Mac-8ED6AF5B48C039E1)

System uptime in nanoseconds: 153337909928
last loaded kext at 101570228221: com.getgreenbytes.driver.zfs   2012.09.14 (addr 0xffffff7fb1b47000, size 53248)
loaded kexts:
com.getgreenbytes.driver.zfs   2012.09.14
com.getgreenbytes.filesystem.zfs   2012.09.14
com.apple.iokit.SCSITaskUserClient   3.5.1
com.apple.driver.AppleUSBCDC   4.1.21
com.apple.driver.AppleHWSensor   1.9.5d0
com.apple.iokit.IOBluetoothSerialManager   4.0.9f8
com.apple.filesystems.autofs   3.0
com.apple.driver.AudioAUUC   1.60
com.apple.driver.ApplePlatformEnabler   2.0.5d4
com.apple.driver.AGPM   100.12.69
com.apple.driver.AppleTyMCEDriver   1.0.2d2
com.apple.driver.AppleMikeyHIDDriver   122
com.apple.driver.AppleHDAHardwareConfigDriver   2.3.0f2
com.apple.driver.AppleHDA   2.3.0f2
com.apple.driver.AppleMuxControl   3.2.6
com.apple.driver.AppleUpstreamUserClient   3.5.10
com.apple.driver.AppleMCCSControl   1.0.33
com.apple.iokit.IOUserEthernet   1.0.0d1
com.apple.Dont_Steal_Mac_OS_X   7.0.0
com.apple.driver.ApplePolicyControl   3.2.6
com.apple.driver.AppleMikeyDriver   2.3.0f2
com.apple.iokit.IOBluetoothUSBDFU   4.0.9f8
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport   4.0.9f8
com.apple.driver.ACPI_SMC_PlatformPlugin   1.0.0
com.apple.driver.AppleLPC   1.6.0
com.apple.driver.AppleSMCPDRC   1.0.0
com.apple.driver.AppleIntelHD3000Graphics   8.0.0
com.apple.driver.AppleIntelSNBGraphicsFB   8.0.0
com.apple.driver.AppleIRController   320.15
com.apple.driver.AppleFileSystemDriver   3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless   1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib   1.0.0d1
com.apple.BootCache   34
com.apple.driver.XsanFilter   404
com.apple.iokit.IOAHCIBlockStorage   2.2.0
com.apple.driver.AppleUSBHub   5.1.6
com.apple.driver.AirPort.Brcm4331   600.15.20
com.apple.driver.AppleFWOHCI   4.9.5
com.apple.iokit.AppleBCM5701Ethernet   3.2.5b3
com.apple.driver.AppleSDXC   1.2.2
com.apple.driver.AppleAHCIPort   2.4.0
com.apple.driver.AppleUSBEHCI   5.1.5
com.apple.driver.AppleUSBUHCI   5.1.5
com.apple.driver.AppleEFINVRAM   1.6.1
com.apple.driver.AppleRTC   1.5
com.apple.driver.AppleACPIButtons   1.6
com.apple.driver.AppleHPET   1.7
com.apple.driver.AppleSMBIOS   1.9
com.apple.driver.AppleACPIEC   1.6
com.apple.driver.AppleAPIC   1.6
com.apple.driver.AppleIntelCPUPowerManagementClient   196.0.0
com.apple.nke.applicationfirewall   4.0.39
com.apple.security.quarantine   2
com.apple.driver.AppleIntelCPUPowerManagement   196.0.0
com.apple.iokit.IOSCSIBlockCommandsDevice   3.5.1
com.apple.iokit.IOUSBMassStorageClass   3.5.0
com.apple.driver.AppleBluetoothHIDKeyboard   165.5
com.apple.driver.IOBluetoothHIDDriver   4.0.9f8
com.apple.driver.AppleHIDKeyboard   165.5
com.apple.iokit.IOSerialFamily   10.0.6
com.apple.kext.triggers   1.0
com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.1
com.apple.driver.DspFuncLib   2.3.0f2
com.apple.iokit.IOAudioFamily   1.8.9fc9
com.apple.kext.OSvKernDSPLib   1.6
com.apple.driver.AppleBacklightExpert   1.0.4
com.apple.iokit.IOSurface   86.0.2
com.apple.iokit.IOBluetoothFamily   4.0.9f8
com.apple.driver.AppleGraphicsControl   3.2.6
com.apple.driver.AppleSMBusController   1.0.10d0
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport   4.0.9f8
com.apple.driver.AppleHDAController   2.3.0f2
com.apple.iokit.IOHDAFamily   2.3.0f2
com.apple.driver.AppleSMBusPCI   1.0.10d0
com.apple.driver.AppleSMC   3.1.3d11
com.apple.driver.IOPlatformPluginLegacy   1.0.0
com.apple.driver.IOPlatformPluginFamily   5.2.0d16
com.apple.iokit.IOFireWireIP   2.2.5
com.apple.driver.AppleThunderboltEDMSink   1.1.8
com.apple.driver.AppleThunderboltEDMSource   1.1.8
com.apple.iokit.IONDRVSupport   2.3.4
com.apple.iokit.IOGraphicsFamily   2.3.4
com.apple.driver.AppleThunderboltDPOutAdapter   1.8.5
com.apple.driver.AppleThunderboltDPInAdapter   1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily   1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter   1.2.5
com.apple.iokit.IOUSBHIDDriver   5.0.0
com.apple.driver.AppleUSBComposite   5.0.0
com.apple.driver.AppleThunderboltNHI   1.6.0
com.apple.iokit.IOThunderboltFamily   2.0.3
com.apple.iokit.IOUSBUserClient   5.0.0
com.apple.iokit.IO80211Family   500.15
com.apple.iokit.IOFireWireFamily   4.5.5
com.apple.iokit.IOEthernetAVBController   1.0.2b1
com.apple.iokit.IONetworkingFamily   3.0
com.apple.iokit.IOAHCIFamily   2.2.0
com.apple.iokit.IOUSBFamily   5.1.6
com.apple.driver.AppleEFIRuntime   1.6.1
com.apple.iokit.IOHIDFamily   1.8.0
com.apple.iokit.IOSMBusFamily   1.1
com.apple.security.sandbox   220
com.apple.kext.AppleMatch   1.0.0d1
com.apple.security.TMSafetyNet   7
com.apple.driver.DiskImages   344
com.apple.iokit.IOStorageFamily   1.8
com.apple.driver.AppleKeyStore   28.18
com.apple.driver.AppleACPIPlatform   1.6
com.apple.iokit.IOPCIFamily   2.7
com.apple.iokit.IOACPIFamily   1.4
com.apple.kec.corecrypto   1.0
System Profile:
Model: Macmini5,1, BootROM MM51.0077.B10, 2 processors, Intel Core i5, 2.3 GHz, 4 GB, SMC 1.76f0
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533643465238432D48392020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533643465238432D48392020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xE4), Broadcom BCM43xx 1.0 (5.106.98.81.20)
Bluetooth: Version 4.0.9f8 10405, 2 service, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD HTS727575A9E362, 750.16 GB
USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfd100000 / 2
USB Device: Lenovo Optical USB Mouse, 0x17ef  (Lenovo), 0x6019, 0xfd130000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3
USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfa100000 / 2
USB Device: BRCM20702 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8281, 0xfa113000 / 5


Kernel_2012-11-07-183607_Administrators-Mac-mini.panic

Code: Select all
Interval Since Last Panic Report:  7987 sec
Panics Since Last Report:          1
Anonymous UUID:                    C30B6220-08EE-413D-A5A6-72E931A977E4

Wed Nov  7 18:36:07 2012
panic(cpu 2 caller 0xffffff7f8f16d1b7): "/staging/zevo/src/uts/darwin/os/condvar.c:61 ZFS assertion failed: (cp->cv_waiters & CV_WAITERS_MASK) == 0"@/staging/zevo/src/uts/darwin/os/printf.c:43
Backtrace (CPU 2), Frame : Return Address
0xffffff808dac3d60 : 0xffffff800d41d5f6
0xffffff808dac3dd0 : 0xffffff7f8f16d1b7
0xffffff808dac3de0 : 0xffffff7f8f17c06a
0xffffff808dac3e00 : 0xffffff7f8f165ebf
0xffffff808dac3e20 : 0xffffff7f8f178fdb
0xffffff808dac3e70 : 0xffffff7f8f202b2e
0xffffff808dac3ef0 : 0xffffff7f8f1ff369
0xffffff808dac3f30 : 0xffffff7f8f17068c
0xffffff808dac3fb0 : 0xffffff800d4b2677
      Kernel Extensions in backtrace:
         com.getgreenbytes.filesystem.zfs(2012.9.23)[04497DBB-8849-31D8-8496-BE10E5711C53]@0xffffff7f8f162000->0xffffff7f8f2fbfff
            dependency: com.apple.iokit.IOStorageFamily(1.8)[A3CC4E44-8E10-3D9A-BA8E-95743E79D125]@0xffffff7f8d975000

BSD process name corresponding to current thread: kernel_task

Mac OS version:
12A269

Kernel version:
Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
Kernel UUID: 8D5F8EF3-9D12-384B-8070-EF2A49C45D24
Kernel slide:     0x000000000d200000
Kernel text base: 0xffffff800d400000
System model name: Macmini5,1 (Mac-8ED6AF5B48C039E1)

System uptime in nanoseconds: 165357112227
last loaded kext at 114121920159: com.getgreenbytes.driver.zfs   2012.09.14 (addr 0xffffff7f8f2fc000, size 53248)
last unloaded kext at 80047012547: com.apple.driver.AppleUSBUHCI   5.1.5 (addr 0xffffff7f8dea6000, size 65536)
loaded kexts:
com.getgreenbytes.driver.zfs   2012.09.14
com.getgreenbytes.filesystem.zfs   2012.09.23
com.apple.iokit.SCSITaskUserClient   3.5.1
com.apple.driver.AppleUSBCDC   4.1.21
com.apple.driver.AppleHWSensor   1.9.5d0
com.apple.iokit.IOBluetoothSerialManager   4.0.9f8
com.apple.driver.AudioAUUC   1.60
com.apple.filesystems.autofs   3.0
com.apple.driver.ApplePlatformEnabler   2.0.5d4
com.apple.driver.AGPM   100.12.69
com.apple.driver.AppleMikeyHIDDriver   122
com.apple.driver.AppleHDA   2.3.0f2
com.apple.driver.AppleUpstreamUserClient   3.5.10
com.apple.driver.AppleMCCSControl   1.0.33
com.apple.driver.AppleIntelHD3000Graphics   8.0.0
com.apple.driver.AppleIntelSNBGraphicsFB   8.0.0
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport   4.0.9f8
com.apple.driver.ACPI_SMC_PlatformPlugin   1.0.0
com.apple.driver.AppleMikeyDriver   2.3.0f2
com.apple.driver.AppleSMCPDRC   1.0.0
com.apple.driver.AppleLPC   1.6.0
com.apple.iokit.IOUserEthernet   1.0.0d1
com.apple.Dont_Steal_Mac_OS_X   7.0.0
com.apple.driver.ApplePolicyControl   3.2.6
com.apple.driver.AppleIRController   320.15
com.apple.driver.XsanFilter   404
com.apple.iokit.IOAHCIBlockStorage   2.2.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless   1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib   1.0.0d1
com.apple.BootCache   34
com.apple.driver.AppleUSBHub   5.1.6
com.apple.driver.AppleFWOHCI   4.9.5
com.apple.driver.AirPort.Brcm4331   600.15.20
com.apple.iokit.AppleBCM5701Ethernet   3.2.5b3
com.apple.driver.AppleSDXC   1.2.2
com.apple.driver.AppleAHCIPort   2.4.0
com.apple.driver.AppleUSBEHCI   5.1.5
com.apple.driver.AppleEFINVRAM   1.6.1
com.apple.driver.AppleRTC   1.5
com.apple.driver.AppleACPIButtons   1.6
com.apple.driver.AppleHPET   1.7
com.apple.driver.AppleSMBIOS   1.9
com.apple.driver.AppleACPIEC   1.6
com.apple.driver.AppleAPIC   1.6
com.apple.driver.AppleIntelCPUPowerManagementClient   196.0.0
com.apple.nke.applicationfirewall   4.0.39
com.apple.security.quarantine   2
com.apple.driver.AppleIntelCPUPowerManagement   196.0.0
com.apple.iokit.IOSCSIBlockCommandsDevice   3.5.1
com.apple.iokit.IOUSBMassStorageClass   3.5.0
com.apple.driver.AppleBluetoothHIDKeyboard   165.5
com.apple.driver.IOBluetoothHIDDriver   4.0.9f8
com.apple.driver.AppleHIDKeyboard   165.5
com.apple.iokit.IOSerialFamily   10.0.6
com.apple.kext.triggers   1.0
com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.1
com.apple.driver.DspFuncLib   2.3.0f2
com.apple.iokit.IOAudioFamily   1.8.9fc9
com.apple.kext.OSvKernDSPLib   1.6
com.apple.iokit.IOFireWireIP   2.2.5
com.apple.driver.AppleHDAController   2.3.0f2
com.apple.iokit.IOHDAFamily   2.3.0f2
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport   4.0.9f8
com.apple.driver.IOPlatformPluginLegacy   1.0.0
com.apple.driver.AppleSMBusController   1.0.10d0
com.apple.driver.AppleSMBusPCI   1.0.10d0
com.apple.driver.IOPlatformPluginFamily   5.2.0d16
com.apple.iokit.IOSurface   86.0.2
com.apple.iokit.IOBluetoothFamily   4.0.9f8
com.apple.driver.AppleSMC   3.1.3d11
com.apple.driver.AppleGraphicsControl   3.2.6
com.apple.iokit.IONDRVSupport   2.3.4
com.apple.iokit.IOGraphicsFamily   2.3.4
com.apple.driver.AppleThunderboltDPOutAdapter   1.8.5
com.apple.driver.AppleThunderboltDPInAdapter   1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily   1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter   1.2.5
com.apple.iokit.IOUSBHIDDriver   5.0.0
com.apple.driver.AppleUSBComposite   5.0.0
com.apple.iokit.IOUSBUserClient   5.0.0
com.apple.driver.AppleThunderboltNHI   1.6.0
com.apple.iokit.IOThunderboltFamily   2.0.3
com.apple.iokit.IOFireWireFamily   4.5.5
com.apple.iokit.IO80211Family   500.15
com.apple.iokit.IOEthernetAVBController   1.0.2b1
com.apple.iokit.IONetworkingFamily   3.0
com.apple.iokit.IOAHCIFamily   2.2.0
com.apple.iokit.IOUSBFamily   5.1.6
com.apple.driver.AppleEFIRuntime   1.6.1
com.apple.iokit.IOHIDFamily   1.8.0
com.apple.iokit.IOSMBusFamily   1.1
com.apple.security.sandbox   220
com.apple.kext.AppleMatch   1.0.0d1
com.apple.security.TMSafetyNet   7
com.apple.driver.DiskImages   344
com.apple.iokit.IOStorageFamily   1.8
com.apple.driver.AppleKeyStore   28.18
com.apple.driver.AppleACPIPlatform   1.6
com.apple.iokit.IOPCIFamily   2.7
com.apple.iokit.IOACPIFamily   1.4
com.apple.kec.corecrypto   1.0
System Profile:
Model: Macmini5,1, BootROM MM51.0077.B10, 2 processors, Intel Core i5, 2.3 GHz, 4 GB, SMC 1.76f0
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533643465238432D48392020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533643465238432D48392020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xE4), Broadcom BCM43xx 1.0 (5.106.98.81.20)
Bluetooth: Version 4.0.9f8 10405, 2 service, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD HTS727575A9E362, 750.16 GB
USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfd100000 / 2
USB Device: Lenovo Optical USB Mouse, 0x17ef  (Lenovo), 0x6019, 0xfd130000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3
USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfa100000 / 2
USB Device: BRCM20702 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8281, 0xfa113000 / 5
grahamperrin Offline

User avatar
 
Posts: 1596
Joined: Fri Sep 14, 2012 10:21 pm
Location: Brighton and Hove, United Kingdom

link

Post by grahamperrin » Sun Nov 25, 2012 6:30 am

grahamperrin wrote:… to date, the following phrase is found in this topic alone:

cp->cv_waiters & CV_WAITERS_MASK


… and now, almost certainly thanks to mistreatment of a disk by me and by my cat, we have that phrase in another topic:

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News?

Post by grahamperrin » Sat Dec 01, 2012 4:02 am

collegeitdept, please, any news?
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Comparison

Post by grahamperrin » Sun Mar 24, 2013 2:13 pm

The following string – comparable to strings in panic reports from collegeitdept at viewtopic.php?p=3238#p3238 – appears in nine of nine .panic files linked from this post under my devices with known imperfections or suspected issues:

): "/staging/zevo/src/uts/darwin/os/condvar.c:61 ZFS assertion failed: (cp->cv_waiters & CV_WAITERS_MASK) == 0"@/staging/zevo/src/uts/darwin/os/printf.c:43

Eight of those nine panics fall under:


(I don't need the data from the ZFS pool on that disk. The disk is kept for test purposes, set aside pending development of ZEVO.)

The panics in collegeitdept's case and in my case do seem similar, but I'm not expert at interpreting panic reports so if anyone can determine a significant difference, please let me know.

If there's true similarity between the panic reports in both cases, then it's remarkable that:

  • panics of this type may occur repeatedly and unavoidably with some types of bad hardware with ZEVO Community Edition 1.1.1.

I have a hunch that if I connect the disk to a ZFS enabled system without ZEVO, and stop the scrub, then I'll be able to connect the disk to a ZEVO-enabled system – not for production use, but enough to use things such as zdb (although with this hardware, I wouldn't expect all uses of zdb to run to completion without a kernel panic).

Generally

My recent experience with known bad hardware – in particular the Wednesday (2013-03-20) string of kernel panics, read alongside this topic – strengthen my feeling that:

  • ZEVO is an extremely stable implementation of ZFS when used with good hardware.
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