PDISK_WRITE_CACHE_STATE

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- Previous
  - 1
    - Getting float values for mouse cursor position Hi, I use the windows mouse pointer position to control the position of an object in my own application. I use GetCursorPos to get the position of the pointer on the screen so I get integer values between 0 and the screen resolution. For a resolution of 1600x1200, I can only get 1600 possible values for x, which is not sufficient for my application. I'm wondering if there is any way to get subpixels values, i.e. Is-it possible to get true float values for the mouse pointer position? (By reducing the mouse sensitivity to the minimum, it's possible to move the mouse a few millimeters before moving by one pixel) Another solution would be to get raw data from the mouse but I'm looking for an easier way to do the trick. I also want to try different input devices so I prefer to avoid this solution. Sincerely. Géry Casiez Tag: PDISK_WRITE_CACHE_STATE Tag: 60671
  - 2
    - Enabling and disabling COMM port FIFOs Hello, Is it possible to control a comm port FIFO (enable/disable) without using the registry. In our application, FIFO control must be immediate. Windows 9X, NT, 2000, XP. Software must integrate with Visual C/C++ 6.0. I see no FIFO IOCTL commands to the kernel driver. If so, what is involved? New device driver? Does one exist? Thanks, Jeff Mokhtar Freescale Semiconductor Tag: PDISK_WRITE_CACHE_STATE Tag: 60670
  - 3
    - minidriver for HIDClass Hi. I'm trying to make a virtual USB HID Keyboard through HIDClass. I'm working out from Walter Oneys HIDFAKE minidriver example. The thing I'm trying to make work is installing the driver, so windows register it as a HID usb keyboard. When the PNP dispatch function in the minidriver gets called, and asks for BusQueryDeviceID, i return USB\\VID_045E&PID_000B. My .inf file looks as follows (the important bits presentet only): ; Fake HID Keyboard [Version] Signature=$Windows NT$ Class=HIDClass ClassGuid={745A17A0-74D3-11D0-B6FE-00A0C90F57DA} DriverVer=03/17/2005,1.000 CatalogFile=DummyCat.cat Provider=Test ;------------------------------------------------------------------------------ ; Standard INF sections ;------------------------------------------------------------------------------ [Manufacturer] %MFGNAME%=DeviceList [DestinationDirs] DefaultDestDir=10,System32\Drivers [SourceDisksFiles] hidfake.sys=1,objchk~1\i386, wdmstub.sys=1,..\..\..\Append~1\newstub\objchk~1\i386, generic.sys=1,..\..\..\generic\objchk~1\i386, generic.sys=1 [SourceDisksNames] 1=%INSTDISK%,,, [DeviceList] %DESCRIPTION%=DriverInstall,USB\VID_045E&PID_000B,HID_DEVICE_SYSTEM_KEYBOARD ;------------------------------------------------------------------------------ ; Windows 2000+ Sections ;------------------------------------------------------------------------------ [DriverInstall.ntx86] CopyFiles=DriverCopyFiles [DriverCopyFiles] hidfake.sys,,,2 generic.sys,,,2 [DriverInstall.ntx86.Services] AddService=FakeKeyboard,2,DriverService [DriverService] ServiceType=1 StartType=3 ErrorControl=1 ServiceBinary=%10%\system32\drivers\hidfake.sys ... If I try to install the driver through the hardware wizard, it tells me that the the inf file contains no information about my hardware. I know it's because of the ClassGuid, but howcome? And I know I'm doing something else wrong as well.. I would like the kbhid.sys to work as the client hid driver(windows standard hid keyboard driver), and I have this driver working as the minidriver alright. How do I accomplish to do that? (I of course use a standard keyboard ReportDescriptor, if you might wonder about that) Thanks in advance! /Kim P. Tag: PDISK_WRITE_CACHE_STATE Tag: 60661
  - 4
    - Automating driver instalation I have driver files with .INF file under some folder and I'd like to install it on the OS using MFC++ (win32) What C++ functions should I use? Appreciate help. Eric Tag: PDISK_WRITE_CACHE_STATE Tag: 60654
  - 5
    - Question about plug and play drivers Hi, When I install for example NDIS intermediate driver for debugging purposes, when I need exchange it for new build, uninstalling and installing again is not sufficient. I must uninstall it, restart machine, and install driver again. It seems that once driver is loaded it remains in memory (or some resources reamins) and unloading needs restart. I think that this behaviour is related to plug-and-play feature in W2K and up, but W2K are plug-and-play (or not absolutely ? ) ? Can be driver 100% unloaded without restarting machine ? Thanks, Peter Tag: PDISK_WRITE_CACHE_STATE Tag: 60652
  - 6
    - Best way to acess to the parallel port Hi! First,let me explain the situation : I have a special device that is connected to the parallel port(Using ECP or EPP) and I need to communicate with,use DMA(PC to the device) and IRQ under Windows 2000/XP. For the moment, I have successfully used some I/O drivers to access directly to the port(PortTalk,DLPortIO...),but it seems to be in a dirty way(and I am not sure that I can use DMA),as these drivers are using some undocumented functions to LOCK/UNLOCK ressources,overriding the parport.sys driver. For the moment,I am quite confused,because I don't know what is the best way to access to the parallel port. Must I write an UpperFilter driver for parport.sys that handle some custom IOCTLs? Must I write a parallel port class driver(Like parclass)? Or,can I just lock ressources when I use the application,as it is going to be the only one that access to the parallel port,when loaded? I also heard that if It's also possible to remove parport.sys and to replace it with a "home made" driver,but I am not interested by this case cause I want to keep the parallel port working normally with other applications. Thank you in advance and sorry for my bad english. Nassim. Tag: PDISK_WRITE_CACHE_STATE Tag: 60650
  - 7
    - USB Driver problem with PTE (bugcheck 3f) We have deployed a wdm usb printer driver to a customer site. After 22-26 hours of idling, the application crashes, leaving a dump file naming the driver as the culprit and with a bugcheck id of 3f. This means that the system has run out of PTEs(page table entries) and is unable to proceed. What is puzzling is that the driver uses only allocations from the nonpaged pool. Running pooltag on a local test system (not the customer system) shows, in the nonpaged pool, no memory leaks from the driver. There is a possibility that the driver, over time, fragments the nonpaged pool, but it doesn't seem right that the system PTEs should be affected. Do, in fact, allocations from the nonpaged pool affect PTEs? If not, what other scenarios seem possible? Besides pooltag.exe and DriverVerifier, are there other programs that might be useful in diagnosing this problem? Thanks RH Tag: PDISK_WRITE_CACHE_STATE Tag: 60648
  - 8
    - How to use DeviceIoControl to deliver the user mode data to give the kernel?? Hi All I have use DeviceIoControl to send user mode data to the kernel, but it wiil crash down when I copy data to Kernal dma buffer, Does anyone can help this ?? any comment or sample code is wellcome Thanks a lot Ps: I define my CTL_CODE like this #define IOCTL_SEND_DATA CTL_CODE(MY_TYPE, 0x900, METHOD_IN_DIRECT, FILE_ANY_ACCES) and send data like this DeviceIoControl(hdevice, IOCTL_SEND_DATA, MyParam, MY_LEN, NULL, NULL, &dwRet, NULL); Myparam is allocate by (MY_PARAM*) malloc(MY_LEN); typedef struct _MY_PARAM { ULONG Channel; ULONG DataLen; ULONG Message[1]; } MY_PARAM #define MY_LEN (sizeof(MY_PARAM)+1024*sizeof(unsigned char)) My Driver code is write as this KeAcquireSpinLock(&pLDI->DmaSpinLock, &oldIrql); pMPG = (MY_PARAM*) pIrp->AssociatedIrp.SystemBuffer; RtlCopyMemory((PULONG) pLDI->DMABuffers[(pMPG->DmaChannel)].Virtual,pMPG->Message,pMPG->DataLen);---->crash down here!!!! KeReleaseSpinLock(&pLDI->DmaSpinLock, oldIrql); Thanks for you read this letter,Sorry for my poor english^^""" Tag: PDISK_WRITE_CACHE_STATE Tag: 60639
  - 9
    - a TOOL to dump memory.dmp into text file ? Hi Experts: Is there a tool which can "translate" all information saved in a memory dump file (a kernel memory dump, or a complete memory dump) into a plain text file? I'm looking at using dumpchk, kd or windbg. But not sure how to get it done. Thanks for your info. Polaris Tag: PDISK_WRITE_CACHE_STATE Tag: 60631
  - 10
    - Force Win98SE to use of WRONG USB2 driver? Force Win98SE to use of WRONG USB2 driver? I bought a no-name USB2 card off EBAY. It came with win98SE drivers, but the driver locks up my system. It's a NEC chip, but there's no clue to the vendor or driver site. I found a driver from a different vendor. I can force 98SE to let me install the wrong driver and it works, Problem is that every time 98SE boots, it thinks it has a new USB card and wants to install drivers. Can I edit the registry to attach the card to the driver? How? Or maybe rewrite the .inf file to point to the driver that works and reinstall? How? Tutorial on .inf files? Thanks, mike -- Return address is VALID but some sites block emails with links. Delete this sig when replying. . Wanted, PCMCIA SCSI Card for HP m820 CDRW. FS 500MHz Tek DSOscilloscope TDS540 Make Offer Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121 Bunch of stuff For Sale and Wanted at the link below. MAKE THE OBVIOUS CHANGES TO THE LINK ht<removethis>tp://www.geocities.com/SiliconValley/Monitor/4710/ Tag: PDISK_WRITE_CACHE_STATE Tag: 60628
  - 11
    - Using DDK with previous version of VC Ok, I read the release notes for the Win2k3 DDK, and it claims that DDK examples should not be compiled on a previous version of the compiler than what the DDK was written for. However it also says that for Win98/ME drivers there are cases where the driver MUST be compiled using VC6, because a later compiler simply will fail. Does this mean that in order to compile drivers at all you must use the version of the compiler that the DDK is written in? Can I build a driver for 2K or XP using VC6 and the Win2K3 DDK? TIA Tag: PDISK_WRITE_CACHE_STATE Tag: 60627
  - 12
    - WIN DDK for x64 build Hi, Is the DDK downloadable? I'm looking for a kit where I can generate "Windows Server 2003 Free x64 Build Environment" . Thanks, S. Evensen Tag: PDISK_WRITE_CACHE_STATE Tag: 60622
  - 13
    - Winlog screen displayed I need to know when the Winlogon screen is displayed. I want this as it is at this point that my app is going to know that all services are up and running. Winlogon Notification will only send an event after a user logs in and I need to know that we are ready to accept a user to log in. If a user is not going to login to this machine by using the Winlogon Notification I will never know that we are in a run state according to my app. The event before this is Startup and this is too early in the boot process for me to say we are ready to go. Do any of you know how I can tell that the logon screen is there? Is there a service that I can check that will start right about the time of the logon screen? I know that if the machine is set to auto logon a user then I will not get a logon screen but I can then use the Winlogon StartShell to know that we are ready to go. Thanks Bob Tag: PDISK_WRITE_CACHE_STATE Tag: 60620
  - 14
    - WM_DEVICECHANGE/DBT_DEVICEARRIVAL is so slo-o-ow WM_DEVICECHANGE (with DBT_DEVICEARRIVAL) works fine but is so slo-o-ow in CD/DVD-rom case. It is not unusual to wait about 10 seconds between injecting the tray and the moment apps finally recieves WM_DEVICECHANGE/DBT_DEVICEARRIVAL notification. Is there any way for user-mode app to get "earlier" notification about media insert/tray inject event? Many thanks! Igor. Tag: PDISK_WRITE_CACHE_STATE Tag: 60610
  - 15
    - SCSI_PASS_THROUGH_DIRECT and SCSI_PASS_THROUGH documentation is wr I used following links to extract information: SCSI_PASS_THROUGH_DIRECT http://msdn.microsoft.com/library/en-us/storage/ hh/storage/structs-scsibus_64c46eef-e5bc-4e81-a479-2bdbd93605e7.xml.asp SCSI_PASS_THROUGH http://msdn.microsoft.com/library/en-us/storage/ hh/storage/structs-scsibus_6d017ae1-d61d-49b8-bfaf-b6b15341732b.xml.asp Look at SCSI_IOCTL_DATA_IN description for DataIn parameter - funny, but in both cases description is different but should be always same. In my opinion should be SCSI_IOCTL_DATA_IN -Read data from the device. Is not it? Furthermore I looked into latest MSDN Library from January, 2005 but found even more funny things, for both IOCTL documentation saying that SCSI_IOCTL_DATA_IN is â??Write data to the deviceâ??:) Is this correct? Tag: PDISK_WRITE_CACHE_STATE Tag: 60601
  - 16
    - Inter-Driver Communication Does anyone have any ideas about how I can Send a IOCTL message from one driver to another video driver. I only have access to the code from the sending driver. Thanks in advance, Anders Tag: PDISK_WRITE_CACHE_STATE Tag: 60586
  - 17
    - Printer driver on Serial port I'm using the Language Monitor in the DDK. My problem is when I install the printer on a serial port (COM), I can't use that port with any other applications. Is there a way to modifiy the Language Monitor to free the port when there are no jobs printing? -- Mario Tag: PDISK_WRITE_CACHE_STATE Tag: 60573
  - 18
    - Does my driver cause "Access Violation in svchost.exe" ? Hi, I have an Ndis driver for Windows XP. It seems to work fine. But the Windbg might catch an "access violation in svchost.exe" error during the XP shutdown every thundreds times. Is the error caused by my Ndis driver? Or, it's a bug of svchost.exe? Below lists the windbg messages: ===================================================================== *** An Access Violation occurred in C:\WINDOWS\System32\svchost.exe -k netsvcs: The instruction at 00650066 tried to read from an invalid address, 00650066 *** enter .exr 0189F9DC for the exception record *** enter .cxr 0189F9F8 for the context *** then kb to get the faulting stack Break instruction exception - code 80000003 (first chance) *** WARNING: symbols timestamp is wrong 0x41109494 0x4060f0f2 for ntdll.dll ntdll!DbgSsHandleKmApiMsg+0x14e: 001b:7c921230 cc int 3 kd> Tag: PDISK_WRITE_CACHE_STATE Tag: 60571
  - 19
    - Problems unloading a driver Hi, I am trying to write an unloadable driver, to achieve that I have created a minimal, presumably unloadable driver, Loading and initializing the driver succeeds BUT unloading ( using 'ControlService(SERVICE_CONTROL_STOP)' ) fails with the following error: "The requested control is not valid for this service.", What may cause such an error? I have added the required DeviceCreate and DeviceClose ICTL Handlers but it had no effectâ?¦ // The CreateClose IOCTL I have added... NTSTATUS DispatchCreateClose(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) { Irp->IoStatus.Status = STATUS_SUCCESS; Irp->IoStatus.Information=0; IoCompleteRequest(Irp, IO_NO_INCREMENT); return STATUS_SUCCESS; } Any help, pointers or samples would be appreciatedâ?¦ Following is the short code with which I am experiancing the problem: The Driver: ********** #pragma code_seg("INIT") // This handler is NEVER called... VOID __stdcall Unload(IN PDRIVER_OBJECT DriverObject) { UNICODE_STRING uszDeviceString; DbgPrint("Simple C++ Driver - Unload.\n"); IoDeleteDevice(DriverObject->DeviceObject); RtlInitUnicodeString(&uszDeviceString, L"\\DosDevices\\ProcDrv"); IoDeleteSymbolicLink(&uszDeviceString); TerminateCppRunTime(); } NTSTATUS __stdcall DriverEntry(IN PDRIVER_OBJECT DriverObject , IN PUNICODE_STRING RegistryPath) { DbgPrint("Simple C++ Driver - DriverEntry\nCompiled at " __TIME__ " on " __DATE__ "\n"); NTSTATUS Status = InitializeCppRunTime(); if (STATUS_SUCCESS != Status) goto ErrorExit; UNICODE_STRING uszDriverString, uszDeviceString; RtlInitUnicodeString(&uszDriverString, L"\\Device\\ProcDrv"); RtlInitUnicodeString(&uszDeviceString, L"\\DosDevices\\ProcDrv"); DbgPrint("C++ runtime was initialized successfuly...\n"); PDEVICE_OBJECT pDeviceObject = NULL; Status = IoCreateDevice(DriverObject, 0, &uszDriverString, FILE_DEVICE_UNKNOWN, 0, FALSE, &pDeviceObject); if (STATUS_SUCCESS != Status) goto ErrorExit; DbgPrint("Device created successfuly...\n"); Status = IoCreateSymbolicLink(&uszDeviceString, &uszDriverString); if(Status != STATUS_SUCCESS) { Unload(DriverObject); goto ErrorExit; } DbgPrint("Link created successfuly...\n"); DriverObject->DriverUnload = Unload; goto SafeExit; ErrorExit: TerminateCppRunTime(); SafeExit: DbgPrint("DriverEntry retruns 0x%.8x\n", Status); return Status; } #pragma code_seg() The driver Loading/Unloading routine ******************************* BOOL WaitForState(SC_HANDLE hDriver, DWORD dwDesiredState, SERVICE_STATUS* pss) { while (1) { if(FALSE == ::QueryServiceStatus(hDriver, pss)) return FALSE; // If the driver reaches the desired state if (pss->dwCurrentState == dwDesiredState) break; DWORD dwWaitHint = pss->dwWaitHint / 10; if (dwWaitHint < 1000) dwWaitHint = 1000; // At most once a second if (dwWaitHint > 10000) dwWaitHint = 10000; // At least every 10 seconds ::Sleep(dwWaitHint); } // while return TRUE; } int _tmain(int argc, _TCHAR* argv[]) { // Start the driver SC_HANDLE hSCM = ::OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); SC_HANDLE hDriver= ::CreateService(hSCM, "ProcDrv", "ProcDrv", SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER, SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL, argv[1], NULL, NULL, NULL, NULL, NULL); if(0 == hDriver && (::GetLastError() == ERROR_SERVICE_EXISTS || ::GetLastError() == ERROR_SERVICE_MARKED_FOR_DELETE) && (0 == (hDriver = ::OpenService(hSCM, "ProcDrv", SERVICE_ALL_ACCESS)))) return 0; SERVICE_STATUS serviceStatus = { 0 }; BOOL bResult = ::StartService(hDriver, 0, NULL); if (bResult) bResult = WaitForState(hDriver, SERVICE_RUNNING, &serviceStatus); else bResult = (::GetLastError() == ERROR_SERVICE_ALREADY_RUNNING); if (!bResult) { ::DeleteService(hDriver); ::CloseServiceHandle(hDriver); } else { // Stop the driver, returns "The requested control is not valid for this service." if(TRUE == (bResult = ::ControlService(hDriver, SERVICE_CONTROL_STOP, &serviceStatus))) bResult = WaitForState(hDriver, SERVICE_STOPPED, &serviceStatus); ::DeleteService(hDriver); ::CloseServiceHandle(hDriver); } ::CloseServiceHandle(hSCM); return 0; } Nadav. http://www.sophin.com Tag: PDISK_WRITE_CACHE_STATE Tag: 60569
  - 20
    - Isoch Read/Write with loopback (newbie) I am developing a driver for ISP1582/1583 for very high speed application ( ~200M). I build my driver based on isousb from WinDDK 2k3. My platform is WinXP Sp2. Now, the PC recognizes my board, but when I try using the testing application from isousb to read/write, it does not work. It seems that the testing application from DDK uses the name PIPE04 and PIPE05 directly to open the handle to the pipe. Is there any other way to overcome this problem ? I tried using the simple way, which is open a handle to the device using GUID with CreateFile(), then using ReadFile() and WriteFile() but that fails as well, GetLastError() return 22 - ERROR_BAD_COMMAND [The device does not recognize the command.] I will have to write a loopback mode application as well. The loopback will only depend on user-mode application. Am I right ? Pls enlighten me on this part. Thanks a lot ! Tag: PDISK_WRITE_CACHE_STATE Tag: 60563
  - 21
    - Isoch Read/Write with loopback (newbie) I am developing a driver for ISP1582/1583 for very high speed application ( ~200M). I build my driver based on isousb from WinDDK 2k3. My platform is WinXP Sp2. Now, the PC recognizes my board, but when I try using the testing application from isousb to read/write, it does not work. It seems that the testing application from DDK uses the name PIPE04 and PIPE05 directly to open the handle to the pipe. Is there any other way to overcome this problem ? I tried using the simple way, which is open a handle to the device using GUID with CreateFile(), then using ReadFile() and WriteFile() but that fails as well, GetLastError() return 22 - ERROR_BAD_COMMAND [The device does not recognize the command.] I will have to write a loopback mode application as well. The loopback will only depend on user-mode application. Am I right ? Pls enlighten me on this part. Thanks a lot ! Tag: PDISK_WRITE_CACHE_STATE Tag: 60562
  - 22
    - Serenum loads in Win XP, bu not on 2K; same inf !!! Hi, This is the snippet of .inf file. ... [ComPort.XXX.NT] AddReg=ComPort.XXX.AddReg CopyFiles=ComPort.XXX.NT.Copy Include=msports.inf Needs=SerialEnumerator.NT [ComPort.XXX.AddReg] HKR,,PortSubClass,1,01 [ComPort.XXX.NT.Copy] serxxx.sys [ComPort.XXX.NT.HW.AddReg] HKR,,"UpperFilters",0x00010000,"serenum" [ComPort.XXX.NT.HW] AddReg=ComPort.XXX.NT.HW.AddReg ... The same inf file loads serenum as upperfilter in Windows XP, but not on Windows 2000. Any ideas on what could be wrong? Appreciate any help. Thanks in advance. Ravi... Tag: PDISK_WRITE_CACHE_STATE Tag: 60560
  - 23
    - Can i create Multiple VLANs using MUX Hi, Can I create Multiple VLANs using the MUX Sample Driver. Recently very strange behaviuor is occuring. I installed and uninstalled the MUX 2-3 times and they are appearing as MUX Sample Driver # 2 , 3 , 4 , 5 etc. But I can actually set the OID_GEN_VLAN_ID in only 1 of them using NDISUIO. Pls Explain ?? What I meas is that why doesnt NDISUIO protocol binds to all Virtual Miniport Drivers(IM) but only one of them ?? Can I enumerate all the Virtual Network Adapters that the MUX creates ? TIA Regards Tarun Tag: PDISK_WRITE_CACHE_STATE Tag: 60549
  - 24
    - setting "custom" dvd book type I am curious if anybody can help me with the following info: 1) what CDB/SCSI command is to be used to set DVD book type? 2) how to determine whether this particular dvd-writer supports changing book type? Many thanks! Igor. Tag: PDISK_WRITE_CACHE_STATE Tag: 60548
  - 25
    - Multiple monitor video What APIs are available to query and/or manipulate the multi-monitor support in WinXP? Specifically, I want to be able to determine if multiple screens are configured, and toggle on/off screens other than the primary. The second can be achieved through the UI by going into the Display Properties applet, choosing the settings tab, right clicking the second (or other) screen, choosing "Attached", then clicking OK. I'm hoping there's a straightforward way to do that simple action programmatically. Erik J Sawyer Appro Systems Tag: PDISK_WRITE_CACHE_STATE Tag: 60546
- Next
  - 1
    - How to detect mouse double click and simultaneous click Hi everyone, I would like to detect mouse double click and (almost) simultaneous click of two or more buttons in moufiltr. Do I need a timer for that or I can do it by detecting the bits in ButtonFlags in the same or consecutive MOUSE_INPUT_DATA? Thanks in advance. Liang Fu Tag: PDISK_WRITE_CACHE_STATE Tag: 60544
  - 2
    - Winsock 2 & Ethernet fragmentation Hi , I'm writing this code in VC using Winsock 2, the Ethernet frames I receive are fragmented to 1524 byte due to Ethernet limitations, my code is based on this simple TCP sniffer http://www.sol-biotech.com/code/Sockets/Main.cpp Is there any way I can instruct Winsock to assemble the frame before I'm sending it to the application layer, I want to avoid the overhead of reassembling the frames Thank you, Sharon.G Tag: PDISK_WRITE_CACHE_STATE Tag: 60542
  - 3
    - windows xp pro x64 compatible hardware Is there a list of compatible hardware for win xp pro x64 edition? I built an athlon 64 system but most of my hardware does not work and I am not finding current drivers on manufacturer websites and the previous drivers don't seem to work. Any suggestions? Tag: PDISK_WRITE_CACHE_STATE Tag: 60541
  - 4
    - Who will free Irp from IoBuildDeviceIoControlRequest? From MSDN DDK document, IRPs created using IoBuildDeviceIoControlRequest must be completed by calling IoCompleteRequest and not by merely deallocating the IRP with IoFreeIrp. IoBuildDeviceIoControlRequest queues the IRPs it creates in the IRP queue of the current thread. Freeing these IRPs without completing them might result in a system crash when the thread terminates as the thread attempts to deallocate the IRP's memory. However, from DDK examples and likes from other sources, I didn't see any FreeIrp or CompleteIrp for this reason. Seems to me the IRP is not freed anywhere through the code. Who frees this IRP? Tag: PDISK_WRITE_CACHE_STATE Tag: 60536
  - 5
    - how to find out at kernel level if a drive Letter is map network d Hi All, on Windows 2k/XP/2k3 Is there a way to find out at kernel level if a drive Letter is a mapped Network Drive. Thanks Tag: PDISK_WRITE_CACHE_STATE Tag: 60531
  - 6
    - Kernel Polling for Correctable Machine Checks Is it possible to disable the Windows kernel polling for correctable machine checks on an AMD processor? I have other functionality that does the polling for these types of errors so they can be logged to a BMC and I am getting race conditions where some of the errors are caught by the OS and some are caught by my functionality. I'd like to be able to disable the OS and allow my functionality to handle all of the correctable errors. Thanks. Bob Tag: PDISK_WRITE_CACHE_STATE Tag: 60530
  - 7
    - Driver for USB Flash Drive wanted - Desperate pl. HELP Hi, Sorry for spamming to most popular news groups :) I am desperate and I dont think a lot of people visit drivers news groups. I bought a Jetway iVogue 512 MB Flash USB drive recently. It did not come with driver for Windows 98. Could not locate Manufacturer website though I googled all I could. Can some one tell me how to get a Manufacturer/ Generic driver for this device ? Appreciate any help. Thanks Sanchez Tag: PDISK_WRITE_CACHE_STATE Tag: 60526
  - 8
    - ddraw.lib Hi All, I have a driver for WIN CE 4.2 OS, Mydriver.dll. In this driver I need to use direct draw objects. So, included ddraw.lib under the linker options. When I run the dll module, I get the following error: ddraw.lib(ddmain.obj) : error LNK2005: _DllMain already defined in MyDriver.obj MyDriver.dll has the entry point as DllMain and ddraw.lib also has the entry point as DllMain and hence the multiply defined symbols. How can I overcome this? I cannot do away with ddraw.lib. Thanks in Advance, Johns Tag: PDISK_WRITE_CACHE_STATE Tag: 60523
  - 9
    - RtlPrefixUnicodeString WindXPDDKSp1 I'm trying to use RtlPrefixUnicodeString in my driver on XP. Can someone *please* tell me: 1. Why my project, built within the standard Build Environment shells provided with the DDK install, can't find ntddk.h 2. Why the ddk doco doesn't tell me which lib to link to use RtlPrefixUnicodeString 3. Why linking with ntdll.lib causes my driver to fail loading. Regards, Mark Tag: PDISK_WRITE_CACHE_STATE Tag: 60519
  - 10
    - COM port application snooping I have a few devices that connect to PC using COM ports. I want to develop a protocol. Application will open the COM port(non-exclusive access) and send a protocol message. When it receives proper response(if at all) application knew the device and continues to talk. If the data is not expected response, may be this COM port is in use by some other application. So how can I snoop data and take it if it for my application and 'not capture' it if it is not for my application. I am not sure if I can achive it at user level itself. Do I need to dig into driver level. Is upper filter driver needed on all COM ports? Please give guidance on how I can accomplish this simple(for my boss), but not so simple. People who worked on embedded devices think COM port is piece of cake, but dont believe PC side complexities. Atleast educate me complexity here. I saw posts on virtual COM ports, but here I am not looking for any virtual COM ports, only existing ports. May be this snooping is needed on virtual COM also because from PC application all are same, but I dont need to develop any virtual ports. Thanks, Raj Tag: PDISK_WRITE_CACHE_STATE Tag: 60517
  - 11
    - Asking TDI send packets without calling TdiBuildSendDatagram Hi, I previously used TDI to send UDP packet, by calling TdiBuildSendDatagram, passing destination information. TDI will build the UDP packet for me. Now I'd like to build the packet myself. Is it possible that I can pass the constructed UDP packet to TDI, just ask TDI to send it? (By going through DDK, it looks like I can construct the IRP and make the TDI_SEND_DATAGRAM request. Is that the correct way?) Thanks, Tag: PDISK_WRITE_CACHE_STATE Tag: 60501
  - 12
    - Monitor CDROM read/write operations using filter driver Hello I want to monitor read and write operations from CDROM (on win xp and 2000). >From what I've read so far, I understand that I need an upper filter driver over scsiport.sys, and to monitor writing for example I need to check for IOCTL_SCSI_PASS_THROUGH. Is this correct? Any guidance on how to do it? Does this method monitor writing from all burning programs? Can anyone supply me with information about ASPI, IMAPI and why CD writing is done through the SCSI bus and not through the cdrom driver? Thanks, Sharon Tag: PDISK_WRITE_CACHE_STATE Tag: 60498
  - 13
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  - 14
    - Trying to send multiple small IRPs -- thread hangs? I have a problem with my driver which is a disk filter. I have to break up read/write requests into multiple smaller requests to send to the disk driver. IoMakeAssociatedIrp() is exactly what I need, but the DDK states that IoMakeAssociatedIrp() can only be used by the top-most driver (FSDs). Heeding the DDK's warning, I have instead written code that calls IoBuildSynchronousFsdRequest() to build an IRP to be sent synchronously to the disk driver. The code is essentially copied verbatim from the DDK samples: KEVENT ke; PIRP Irp; KeInitializeEvent(&ke, NotificationEvent, FALSE); Irp = IoBuildSynchronousFsdRequest(...); stat = IoCallDriver(NextDevice, Irp); if (stat == STATUS_PENDING) KeWaitForSingleObject(&ke, Executive, KernelMode, FALSE, NULL); For some reason all threads that go down this code path end up hanging in IoCancelIrp() when they try to terminate. My event gets set to indicate that the IRP has completed, but the IRP is still queued to the thread. Since the kernel does not BSOD, I presume IoFreeIrp() isn't actually called. My question is two-fold: 1) Is there any reason why IoMakeAssociatedIrp() wouldn't work? I don't see any intrinsic reason for the DDK's stern warning against using this in a lower-level driver. 2) If IoMakeAssociatedIrp() is out of the question, why is my driver causing threads to hang? TIA -Matt Tag: PDISK_WRITE_CACHE_STATE Tag: 60496
  - 15
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  - 16
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  - 17
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  - 20
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  - 21
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  - 22
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  - 23
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  - 24
    - NDIS_TASK_TCP_LARGE_SEND NDIS_TASK_TCP_LARGE_SEND structure member definition from MSDN Home > MSDN Library > Win32 and COM Development > Driver Development Kit > Network Devices and Protocols > Reference > NDIS > Structures Used by NDIS Drivers MinSegmentCount A miniport driver set this to the minimum number of segments that a large TCP packet must be divisible by before the transport can offload it to a NIC for segmentation. The transport will not offload a large packet to the miniport driver for segmentation unless the miniport driver can create at least MinSegmentCount segments from the packet. If a large TCP packet does not meet the minimum-segment requirement, the TCP/IP transport itself segments the packet into smaller packets. The 1st sentence and the 2nd does not seem to match each other. Is it the expected minimum segment count input from TCP/IP transport to NIC before segmentation offload (my interpretation from 1st sentence) or is it the expected minimum segments that the NIC segmentation offload can create for a given packet passed from TCP/IP transport (my interpretation from 2nd sentence)? Regardless, I am not quite sure why this parameter is important. How does any value other than 1 make sense? Anyone can explain? Doesn't "MaxSegmentCount" by NIC offload engine make more sense? If PDU is larger than MaxOffloadSize*MaxSegmentCount, the NIC offload engine won't be able to do the right segmentation. TCP/IP transport should not offload in this case. Thanks! Heng-Hsin Tag: PDISK_WRITE_CACHE_STATE Tag: 60457
  - 25
    - network connection icons I am trying to figure out when and how network connection icons are created while a network device driver is installed. I see that this is directly related to the keys in the registry at HKLM\CurrentControlSet\Control\Network\{}, but what cases them to be created? The reason why I am interested is because I have a MUX IM based driver that keeps creating new entries upon installation and de-installation and I would like that to stop. -- davidg Tag: PDISK_WRITE_CACHE_STATE Tag: 60433

Hi,

Why ?
PDISK_WRITE_CACHE_STATE is in only wxp folder.

Can I use PDISK_WRITE_CACHE_STATE on W2003(x64) ?

--
ishikawa

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Re: PDISK_WRITE_CACHE_STATE by Mark

Mark
Thu Mar 17 21:34:18 CST 2005

ifc_ishikawa wrote:
> Hi,
>
> Why ?
> PDISK_WRITE_CACHE_STATE is in only wxp folder.
>
> Can I use PDISK_WRITE_CACHE_STATE on W2003(x64) ?
>
It would appear that this and IOCTL_DISK_GET_WRITE_CACHE_STATE are only
supported on XP. You would have to ask somebody at msoft why this is so.

--

=====================
Mark Roddy DDK MVP
Windows 2003/XP/2000 Consulting
Hollis Technology Solutions 603-321-1032
www.hollistech.com

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Re: PDISK_WRITE_CACHE_STATE by ifc_ishikawa

ifc_ishikawa
Mon Mar 21 08:56:03 CST 2005

Mark,Thanks.

Anyone of Microsoft, any help.

"Mark Roddy" <markr@hollistech.com> wrote in message
news:%23QqLet2KFHA.1948@TK2MSFTNGP14.phx.gbl...
> ifc_ishikawa wrote:
>> Hi,
>>
>> Why ?
>> PDISK_WRITE_CACHE_STATE is in only wxp folder.
>>
>> Can I use PDISK_WRITE_CACHE_STATE on W2003(x64) ?
>>
> It would appear that this and IOCTL_DISK_GET_WRITE_CACHE_STATE are only
> supported on XP. You would have to ask somebody at msoft why this is so.
>
> --
>
> =====================
> Mark Roddy DDK MVP
> Windows 2003/XP/2000 Consulting
> Hollis Technology Solutions 603-321-1032
> www.hollistech.com

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