[vbox-dev] vhd format not stable?

[Frank Mehnert]

Actually the .vhd format is less tested than the .vdi format. Which
VBox version are you using?

On Thursday 11 June 2009, Huihong Luo wrote:
> It seems VHD format is not stable as VDI. VBoxSVC.exe pretty much always
> crashes when a snapshot is being discarded. I am running an XP guest on
> Vista host. The VHD's capacity is over 100G. 
> If you look at the following stack, the crash was caused by
> pImage->pszParentFilename is NULL inside
> static int vhdDynamicHeaderUpdate(PVHDIMAGE pImage) in VHDHDDCore.cpp
>  
> I used the very recent SVN source.
>  
> //////////
> vboxsvc.exe crash stack:
>  
> VBoxRT.dll!RTPathFilename(const char * pszPath=0x00000000)  Line 240 C++
>   VBoxDDU.dll!vhdDynamicHeaderUpdate(VHDIMAGE * pImage=0x00000000)  Line
> 362 + 0x12 bytes C++ VBoxDDU.dll!vhdFlush(void * pBackendData=0x01c2caf0) 
> Line 1157 C++ VBoxDDU.dll!vhdClose(void * pBackendData=0x01c2caf0, bool
> fDelete=false)  Line 880 + 0x6 bytes C++ VBoxDDU.dll!VDClose(VBOXHDD *
> pDisk=0x01e0e218, bool fDelete=false)  Line 2268 C++
> VBoxSVC.exe!HardDisk::taskThread(RTTHREADINT * thread=0x00000000, void *
> pvUser=0x00e0e2b8)  Line 4063 + 0xb bytes C++
> VBoxSVC.exe!HardDisk::Task::runNow()  Line 220 C++
>   VBoxSVC.exe!HardDisk::mergeTo(HardDisk::MergeChain * aChain=0x01c2cfe0,
> ComObjPtr<Progress,ComStrongRef> * aProgress=0x01e06fe8, bool aWait=true) 
> Line 2844 + 0x9 bytes C++
> VBoxSVC.exe!HardDisk::discard(ComObjPtr<Progress,ComStrongRef> &
> aProgress={...}, HardDisk::MergeChain * aChain=0x01c2cfe0)  Line 2248 + 0xe
> bytes C++
> VBoxSVC.exe!SessionMachine::discardSnapshotHandler(SessionMachine::DiscardS
>napshotTask & aTask={...})  Line 10584 C++
> VBoxSVC.exe!SessionMachine::DiscardSnapshotTask::handler()  Line 8251 + 0x9
> bytes C++ VBoxSVC.exe!SessionMachine::taskHandler(RTTHREADINT *
> __formal=0x01c32108, void * pvUser=0x01e06fe0)  Line 11412 C++
> VBoxRT.dll!rtThreadMain(RTTHREADINT * pThread=0x01c32108, unsigned int
> NativeThread=4312, const char * pszThreadName=0x01c32170)  Line 635 + 0xa
> bytes C++ VBoxRT.dll!rtThreadNativeMain(void * pvArgs=0x01c32108)  Line 106
> + 0xb bytes C++ msvcr80.dll!__endthreadex()  + 0x3b bytes
>   msvcr80.dll!__endthreadex()  + 0xc7 bytes 
>   kernel32.dll!@BaseThreadInitThunk at 12()  + 0x12 bytes 
>   ntdll.dll!___RtlUserThreadStart at 8()  + 0x27 bytes 
>   ntdll.dll!__RtlUserThreadStart at 8()  + 0x1b bytes 



-- 
Dr.-Ing. Frank Mehnert    Sun Microsystems, Inc.    www.sun.com
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