How can I determine the size of one cluster?

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- Previous
  - 1
    - Returning order of CompletionRoutines() and IoCallDriver() Hi Let's say I'm a high level driver and i call IoCallDriver to pass an IRP down the stack, and the whole operation is synchronous. There are several devices in the stack (let's say A,B,C,D), each one of them has a completion routine (except D). After device D completes the irp, all completion routines for all the devices are being called, and only afterwards all the IoCallDriver() routines of all the devices return? (or if I'm wrong, what is the right order?) Thanks Tag: How can I determine the size of one cluster? Tag: 76916
  - 2
    - kernel vs user file name I need to read a file in a kernel mode driver. The file name is passed from a user mode application in the form of "C:\file" or \\Computer\Share\File. Is there a standard kernel or user mode API, or some document describing the proper algorithm to convert "C:\file" to "\??\C:\file" (or "\Device\...."), and "\\Computer\Share\File" to "\Device\Lanman..." (or whatever), in order to make a user mode file name usable in kernel mode? Thank you. Tag: How can I determine the size of one cluster? Tag: 76914
  - 3
    - to make memory read only Hello All, I writing a driver for windows 2k/xp/2k3. For debugging purpose I want to make a data structre read only. There is call MmProtectMdlSystemAddress to change it to read only but it is only supported from XP onward. Is there any way i can do it on windows 2000. Thanks Tag: How can I determine the size of one cluster? Tag: 76910
  - 4
    - IoCompleteRequest() from WorkItem Hi Lets say I'm in PASSIVE IRQL in a dispatch function. I mark my irp as pending. Later, I create a workitem that receives the irp as a context and do some work in it. In the end of the workitem's function, I complete the IRP. Back to the dispatch routine - after allocating and queuing the workitem, I return STATUS_PENDING. Now, because I'm in PASSIVE level, there can be a context switch from my dispatch routine to my workitem's function, so it will run and complete the irp, before I return STATUS_PENDING from the dispatch routine. (it means that when I return STATUS_PENDING, the irp is already completed!) Is there a problem with the above scenario? And if so, how should I handle it? Tag: How can I determine the size of one cluster? Tag: 76904
  - 5
    - Looking for information on USB mouse firmware Hi driver experts, I would like to learn how to write/modify/load USB mouse firmware. Any suggestions on books, support websites, forums? If this is not suitable for this site, can anyone direct me to suitable places for this kind of posts? Thanks in advance. Tag: How can I determine the size of one cluster? Tag: 76903
  - 6
    - WHQL tests not required for Windows XP home? Hi, To get our driver signed for Windows XP Pro and XP Home, do I need to run WHQL test for only XP Pro or both? The document seems to indicate that XP Home is not required. Is this true? Thanks, Ning Tag: How can I determine the size of one cluster? Tag: 76902
  - 7
    - Synchronizing the clock of few computers on a LAN Hi, I have about ten computers that needs to be synchronized such as the clock time on each computer is within about 20 ms from the others. There are soft real time applications distributed on the computers that needs to synchronized. Can the windows 2000 and XP w32time service achieve that? Any third party software? Any other way to synchrinize those applications? external devices? -- Thanks, Daniel Tag: How can I determine the size of one cluster? Tag: 76897
  - 8
    - OS compatibility When building the samples for W2K I get warnings telling that certain drivers are not compatible with W2K. Is there an easy way to find out why they are not compatible? I have searched the documentation for a table showing the differences between the various OSes but I can't find one. Tag: How can I determine the size of one cluster? Tag: 76892
  - 9
    - UDF Filter Driver I have written a filter driver that sits inbetween the UDF and various dvd playback applications. In my filter I need to fail a read and get the application to stop playback. I am doing this by setting Data->IoStatus.Status = STATUS_DEVICE_IO_ERROR; Data->IoStatus.Information = 0; WinDvd interprets it correctly and cleanly stops playback. MediaPlayer (and some other players) start playing ugly static out of the speakers and the time counter keeps climbing eventhough it is no longer playing video. I have tried various other status codes but it doesn't seem to matter. It seems like they are not checking the return status... Any thoughts? -- Still trying to build a perpetual motion machine Tag: How can I determine the size of one cluster? Tag: 76887
  - 10
    - Registry entry for a driver. I have a driver for a device, after i install the driver, it places lot of registry entires in the system, so how could i bactrack or recognise, what all the entries in the registry has been made by the driver. Can any one suggest your ideas, so that i would be thankful. Regards Prasanna Tag: How can I determine the size of one cluster? Tag: 76885
  - 11
    - =?utf-8?B?SG93IHRvIGhvb2sgU1RSRVRDSEJMVCDvvIhwcmludGVyIGRyaXZlcu+8iQ==?= Dear All=EF=BC=8C I am writing a printer driver=EF=BC=8CI want to hook the STRETCHBLT function=EF=BC=8Cbut I can not get it work=E3=80=82 My codes section as below=EF=BC=8C ///////////////////////////////////////////////////// hSurf =3D EngCreateBitmap( sizeSurface, GetBmpDelta(Format, pPDEV- >ulHorzRes),Format,BMF_USERMEM|BMF_TOPDOWN, NULL) ; EngAssociateSurface( (HSURF)hSurf, pPDEV->hDev, HOOK_STRETCHBLT ) ; ////////////////////////////////////////////////////// BOOL WINAPI DrvStretchBlt( IN SURFOBJ *psoDest, IN SURFOBJ *psoSrc, IN SURFOBJ *psoMask, IN CLIPOBJ *pco, IN XLATEOBJ *pxlo, IN COLORADJUSTMENT *pca, IN POINTL *pptlHTOrg, IN RECTL *prclDest, IN RECTL *prclSrc, IN POINTL *pptlMask, IN ULONG iMode ) { MessageBox(NULL,L"DrvStretchBlt",L"printer driver",MB_OK); iMode =3D HALFTONE; return EngStretchBlt( psoDest, psoSrc, psoMask, pco, pxlo, pca, pptlHTOrg, prclDest, prclSrc, pptlMask, iMode ) ; } ///////////////////////////////////////////////////////// Anybody can give me some advice=EF=BC=8CThanks a lot=EF=BC=81 Best Regards=EF=BC=8C Black Tag: How can I determine the size of one cluster? Tag: 76879
  - 12
    - USB Host controller on Windows I want to transfer data from a SH7727 target board to Windows through USB protocol. How should I go about it? If i use the host controller on PC,what is the procedure to access the USB port of the target board. please help me out. I am stuck. Tag: How can I determine the size of one cluster? Tag: 76876
  - 13
    - WDK install issue Does anyone know of a way to specify the installation directory when the MSI has disabled the browse functionality? I do not have enough harddrive space on C: and would like to install to D: instead. Tag: How can I determine the size of one cluster? Tag: 76872
  - 14
    - PICs for driver signing in x64 unavailable? I was just forwarded an email response we received from WinQual when we inquired about getting a PIC for signing our drivers for the new x64 signing policy. I'm hoping I'm just over reacting, but... I was disturbed to hear that they are not available at this time. In fact, there was a strong implication in this email that PICs would not be available until the last release candidate for Vista. Here is the relevant portion of this email: "This is not available yet, but should be in time for Vista launch. The PIC is a new signing program for files we couldn?t sign before. We?ll be making more announcements regarding the availability of PIC to sign drivers as we get closer to the Vista logo program launch, which will be at the last Release Candidate." Microsoft has done this in the past (i.e. not releasing full WHQL tests, signing tools, etc. until just before RTM), and it always has caused problems. So I'm trying to head this off at the pass this time. I don't know about the rest of you, but we need time to get a PIC, integrate signing with it into our build process, build a driver, test it internally, fix any problems that signing caused (and rebuild and retest) and deliver a candidate driver to the OEMs early enough that they have time to test it themselves (and get any needed bug fixes) before their deadline for burning a golden master for manufacturing of their first x64 machines. And that's assuming that the Vista Beta community doesn't find any bugs in the kernel embedded signing code in Windows... I'm crossposting this to m.p.d.d.d because I think this issue is of wider interest than just the winlogo newsgroup. And yes, I've already sent an email to WinQual about this. -- Ray Tag: How can I determine the size of one cluster? Tag: 76867
  - 15
    - Bug in CDROM.SYS In DDK2000...WDK 5112, CDROM.SYS!CdRomInterpretReadCapacity contains the following code: ---------------------------- // // Calculate media capacity in bytes. // commonExtension->PartitionLength.QuadPart = (LONGLONG)(lastSector + 1); // // we've defaulted to 32/64 forever. don't want to change this now... // fdoExtension->DiskGeometry.TracksPerCylinder = 0x40; fdoExtension->DiskGeometry.SectorsPerTrack = 0x20; // // Calculate number of cylinders. // fdoExtension->DiskGeometry.Cylinders.QuadPart = (LONGLONG)((lastSector + 1) / (32 * 64)); commonExtension->PartitionLength.QuadPart = (commonExtension->PartitionLength.QuadPart << fdoExtension->SectorShift); ---------------------- The code rounds the number of cylinders to (32*64) for DISK_GEOMETRY, which results in a wrong value returned to the caller. The number of sectors becomes wrong, too (TracksPerCylinder * SectorsPerTrack * Cylinders). IOCTL_DISK_GET_DRIVE_LAYOUT and IOCTL_DISK_GET_PARTITION_INFO return the correct media capacity in PARTITION_INFORMATION.PartitionLength. The difference between PARTITION_INFORMATION and DISK_GEOMETRY prevents certain filesystems, including NTFS, from being mounted from CD/DVD/BD/HDDVD/... >> // we've defaulted to 32/64 forever. don't want to change this now... I think now it's a good time to fix it at last, at least for Vista. Thanks Tag: How can I determine the size of one cluster? Tag: 76866
  - 16
    - XP64 -does not load Windows Defender (Beta 2) spyware detector - Any solution to loading Windows Defender (beta 2) on XP64 ? Error message said it only works on 32 bit systems. Why doesn't it load in the 32 bit section? Seems a little wierd that the Deffender can not be used in XP64. Tag: How can I determine the size of one cluster? Tag: 76864
  - 17
    - WDF 1.0 PCIDRV.sys and NDISEDGE.sys will not load I built pcidrv.sys and ndisedge.sys with Winddk Longhorn x86 checked environment, plus set_wdf_env.cmd and kmdf\inc. Then installed them with the netdrv.inf and wdf**.dll co-installer in vista Beta2. However, both drivers cannot be loaded and the device manager error code is #37, "Windows cannot initialize the device driver for this hardware." No any event log associated with those failure either. Can any Microsoft expert duplicate the problem ? or I missed anything during build or install ? Thanks for any advice. -Gary Li Tag: How can I determine the size of one cluster? Tag: 76863
  - 18
    - Mobo Procomp (BS61M ver.1.0 socket 370) Hi to all, i'm searching for the win98 driver (video and sound on-board) of Procomp (BS61M ver.1.0 socket 370), in subject. tanks to all. Matteo Tag: How can I determine the size of one cluster? Tag: 76858
  - 19
    - assembly routine return values in which regs?? Folks, For IA32 assembly code, the return values from routine will be stored in ECX & EAX registers..... For AMD64 assembly code, will the return values be stored in RCX & RAX registers? Also, (in AMD64) if the routine just need to return single byte, then would it just need to store it in AL register (& word means AX, DWORD means EAX and so on)?? -- ++Sathya Tag: How can I determine the size of one cluster? Tag: 76854
  - 20
    - unidrv plugins and dialog boxes I have been having difficulty trying to determine where it is possible to display a dialog box from a unidrv plug-in. From what I read in the documentation it appears as though both UI and rendering plugins run in the application's context, before anything is sent to the spooler. If this is indeed the case I would assume that it would be possible to display a dialog box to capture document specific properties during EnablePDEV processing in a rendering plug-in. This would allow me to capture things like fax #s for each document by displaying a dialog to the user who started the job. I further assume that the dialog box would appear in a particular user's termnal services window. Are my assumptions correct or am I completely out to lunch? If I am out to lunch what would be the easiest way to capture fax #s for each individual document in a terminal services environment? Tag: How can I determine the size of one cluster? Tag: 76853
  - 21
    - MONITOR_INFO_2 What are the values pEnvironment member of MONITOR_INFO_2 can take today? The below is from the documentation, which I beleive is old. What about 64 bit systems(itanium and AMD)? pEnvironment Pointer to a null-terminated string that specifies the environment for which the monitor was written (for example, Windows NT x86, Windows NT R4000, Windows NT Alpha_AXP, or Windows 4.0). -- Vipin Aravind http://www.explorewindows.com Tag: How can I determine the size of one cluster? Tag: 76852
  - 22
    - Word crashes with my printer driver, but no other programs do. Hi, I'm developing a printer driver UI based on the MSPLOTUI sample from the DDK. It works great from all applications except Word, which craches. It seems that Word is calling some functions on the driver that the other programs don't. Can anyone give me a list of the printer driver functions that Word calls, and the order they are called? /Erik Tag: How can I determine the size of one cluster? Tag: 76851
  - 23
    - Large Transfer Lengths With SCSI Pass-Through? Is it possible to make transfer larger then 64KB via SCSI Pass-Through? If so how is the best way to go about it? If this is SCSI HBA dependent how can you tell the maximum transfer length size allowed? I looking to test up to 16MB transfers. Tag: How can I determine the size of one cluster? Tag: 76849
  - 24
    - Write a WDM driver Hi, I wanted to write a Mouse filter driver which will intercept the mouse click and trigger the user applications like those in the logitech , but not their own.. i wanted to invoke my own applicatoins. I have tried to write the mouse driver but got stuck.. I am stuck at this point as what approach I should take? If I should take the HID class help or what ... ? I have fair understanding of the WDM but not done any fillter drivers... I want to the driver on the machines and configure the mouse to open my application intercepting the mouse clicks.. I would really appreciate if anybody gives me the proper direction on designing the driver.. thanks. -- Abhijit. Tag: How can I determine the size of one cluster? Tag: 76848
  - 25
    - installing a driver using devcon hello, i have a weird behavior i don't understand - i'm using devcon in order to install a software driver. when i put the sys and inf file in any folder (even hidden) everything is ok, but when i put them in the c:\windows\inf file there is a pop up asking for the sys file (and when i direct it to the inf folder it installs it). why is that? how do i solve that? thank you, Tag: How can I determine the size of one cluster? Tag: 76847
- Next
  - 1
    - Causes of USBD_STATUS_ISO_NOT_ACCESSED_BY_HW Greetings, I realize in my previous post "NEC B1 HC chokes with full BW USB2 ISO IN stream" my primary question was hidden in a flurry of details. Can I be doing something in my USB camera driver to cause the USBD_STATUS_ISO_NOT_ACCESSED_BY_HW error I am seeing with the NEC host controller? The only thing I have heard of that causes this error is URB starvation. That is clearly not the trouble. I am queuing 10 URBs of 32 packets each. Also, the driver works perfeftly under the VIA controller. Is there some subtle error I might be causing that effects the NEC controller but not the VIA one, or is there simply a bug in the NEC controller? Best regards, Tom Udale Tag: How can I determine the size of one cluster? Tag: 76846
  - 2
    - WDF Driver Install problem Hi, I'm developing a WDF driver for a PCI device. I have written a simple driver and the INF. The INF file seems ok when used with CHKINF. When i install it on the target system (XP checked build 2600) everything looks ok but at the end it simply says the drivers are not installed. Looking in WinDBG reveals the following when the driver installs: InstallDev error = 643 Anyone have any suggestions? Have tried to find information on the error but am having trouble finding anything. Thanks in advance. Tag: How can I determine the size of one cluster? Tag: 76844
  - 3
    - PC as USB device Is it possible that I can design an application running on my PC behave as an USB device to another USB host(running on a SH7727 board)? Tag: How can I determine the size of one cluster? Tag: 76840
  - 4
    - DDK PCIDRV + NDISEDGE cannot be loaded in Vista B2. I built the winddk samples of pcidrv and ndisedge in longhorn x86 build environment of winddk, and used the netdrv.inf to install them in Vista Beta2. ndisedge.sys is loaded as the upper filter driver of pcidrv, and the DriverEntry() is called. However, the MPInitialize() never been called, instead, MPUnload() in ndisedge.sys is called and the filter driver is unloaded. pcidrv.sys itself is working Ok. Anyone has suggestion what I did wrong ? build or install ? or the ndisedge.sys itself has problem ? Thanks in advance. -Gary Li Tag: How can I determine the size of one cluster? Tag: 76831
  - 5
    - Q) What's better way.(Using DriverStudio from Compuware or Win DDK sample source code) Subject : What's better way.(Using DriverStudio from Compuware or Win DDK sample source code) Hello every one, I have a DriverStudio that has a feature to generate a Driver source code automatically. Is it better way to adapt a source code from DriverStudio not from Win DDK sample source code? Please share your experience or your suggestion. Detail experience will be more appreciate. Thank you. // Daum Tag: How can I determine the size of one cluster? Tag: 76829
  - 6
    - help! driver driver for: Scanner TRUST IMAGERY 4800 EASY for WINDOWS XP porta parallela grazie Mark Tag: How can I determine the size of one cluster? Tag: 76822
  - 7
    - NTFS writing I have a device that supports writing in 64K blocks only. To write say 4096, I need to read 64K, update 4096, then write 64K. This causes significant performance degradation with NTFS. Is there any way, like reporting certain geometry or whatever, to make NTFS send bigger write chunks to the device whenever possible, especially when updating MFT? Thanks! Tag: How can I determine the size of one cluster? Tag: 76820
  - 8
    - NEC B1 HC chokes with full BW USB2 ISO IN stream Greetings, I have tracked down a bug that looks for all the world like it is caused by the NEC B1 HC on the Adaptec USB2 PCI interface card I have. The host is a MP Athlon system running XP SP1 with the Adaptec card using the NEC B1 EHCI controller and a separate VIA EHCI controller on the mobo. Both controllers are using the Microsoft usbehci.sys driver version 5.1.2600.1243. When running a full bandwidth ISO stream from a USB camera (3072 bytes/microframe), the NEC controller chokes with USBD_STATUS_ISO_NOT_ACCESSED_BY_HW (c0020000). It does it horribly when running on a MP boot. If I run on a UP boot of the same machine (same HC driver), it is still there but not as bad. Now if I switch the camera over to the VIA controller, everything else I think exactly the same, the error goes away entirely. It is gone on both the MP and UP boots. Before I checked the VIA HC, I thought it was the camera being too slow and not responding to the IN token in enough time. But after seeing the difference with the VIA HC, I looked a little more carefully and saw on my bus analyzer that indeed the IN token is never sent. So it is clearly on the host end. It is always the third transaction in the microframe that fails; after two successful transactions. I was really surprised that a HC would fail like that. I looked online to see if there were any known troubles with that particular HC, but I did not see anything. Anyone have any ideas?? Best regards, Tom Udale Tag: How can I determine the size of one cluster? Tag: 76819
  - 9
    - Device IO / Detect Drive Type HI My application needs to directly modify an attached Flash Device. (own FS on it) I am using physicaldive[nn] to open and DeviceIO(IOCTL_DISK_GET_DRIVE_GEOMETRY_EX) to detect the size of the card. (using the member "DiskSize") Is there a way to detect the drive's "type" in more detail ? I already have the information that it is a "removable" one, but I'd like to make 100% sure that it is a FLASH type. Are there any documened calls to retrieve more information about a given drive ? Or can I wrap an ATA Info command in an ordinary DeviceIO call ? TIA w.b. Tag: How can I determine the size of one cluster? Tag: 76811
  - 10
    - IRQL in TDI filter dispatch functions Hi I'm developing a TDI filter driver. a. According to the MSDN, IoCallDriver() can be called at IRQL <= DISPATCH_LEVEL. Therefore, should I assume that it is possible for all dispatch routines in my TDI filter to run at IRQL = DISPATCH_LEVEL? (According to MSDN this rule is right for all kinds of filter drivers?) b. My completion routines are being invoked in an arbitrary thread context and probably at high IRQ. Is this also right for a TDI filter? c. When code can run at IRQL => DISPATCH_LEVEL, all the allocations on the STACK also need to be none paged? (Do I need to use paged_code macro or something like that?) Thanks. Tag: How can I determine the size of one cluster? Tag: 76810
  - 11
    - Windows CE USB Driver Hello togehter! I want to develop an USB driver for an PDA with Windows CE, has anybody Tutorials/samples or experiences with this. I'm grateful for every help. thx chris Tag: How can I determine the size of one cluster? Tag: 76808
  - 12
    - manual install driver for pnp device I need to run a batch or a exe from inno setup(something like installshield) to install drivers for a Pnp usb device with FTD2XX drivers from FTDI. Now from a batch i call: C:\WINDOWS\System32\rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 .\ftd2xx.inf and i can successfully see the install dialog appear, all the drivers files are copyied in the right places, oemxx.ing is created, but when i plug in the device the same dialog appear and i need to reinstall drivers again in order to make it work. I noticed that after the batch, in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\ there is no Vid_0403&Pid_6001 key as expected So how can i full manually install this device without interaction with the user? Hi Andrea Tag: How can I determine the size of one cluster? Tag: 76807
  - 13
    - Communication via USB I am developing virtual console for a hardware board. it is supposed to work as a LCD for a target board. This would enable boards without LCD support to display on the desktop.The design is ready. Now shall I use TCP/IP for communication or the USB port.The advantage with USB approach is that every board has it whereas TCP/IP may not be implemented on every board. How should I start? Tag: How can I determine the size of one cluster? Tag: 76804
  - 14
    - serial port pci card generic driver wanted Hello I have installed this card one year ago without any problem yesterday I formatted my hard disk when starting windows xp home, my pci card, with 2 serial ports is not recognised (generic, standard) I can't find my driver, if I had one can any one help to find this driver ? thank you in advance Philippe (France) Tag: How can I determine the size of one cluster? Tag: 76802
  - 15
    - How to get started with creating a virtual filesystem? I would like to create a new virtual volume with a virtual filesystem, something that is visible as a drive, can be given a letter, and browsed in "explorer" etc., but where all requests to access files are handled by me, preferably delegated to a service in user space. What kind of component do I actually need to write, at a minimum? If I understand well, I would need to somehow create a fake volume and tell Windows (I/O manager?) about it, register my own filesystem and make Windows forward all requests to this fake volume to my filesystem instance, with which I would interact via ioctl. Is that correct? Could it be simpler? Is there a way to get there even faster with WDF? How about UMDF, does it have support for this sort of functionality? Tag: How can I determine the size of one cluster? Tag: 76789
  - 16
    - writing to the event viewer hello, i'm trying to write messages from my network driver in the event viewer using NdisWriteErrorLogEntry. in the driver i have the code: NdisWriteErrorLogEntry(Adapter->AdapterHandle, NDIS_STATUS_MEDIA_DISCONNECT, 1,0x001b); i also wrote a resource only dll with the entry 0x001c and an error string. i've modified the inf file to use that dll - the inf file copies it and in the AddEventLog.reg i've added it. but still, when i look in the event viewer i see a discription that says: "The description...cannot be found...use the /AIXSOURCE=flag....." but in the data i see my error code number. what am i doing wrong? Tag: How can I determine the size of one cluster? Tag: 76786
  - 17
    - Device Object Hello I got a function now that is executed on the following line: DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = FilterDispatchIo; NTSTATUS FilterDispatchIo( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp ) In this function the DeviceObject is a ControlDeviceObject or a the main DeviceObject. When it's a DeviceObject is passed through to another function that's passing the IRP to the lower driver. If it's a ControlDeviceObject it's going to look if something is send from the user application. In this check im looking if my own made IOCTL is send or not, if so i want to add an mousepackage. The problem is i need to main device to send the package to but at this moment i get the ControlDeviceObject all the time. I also tryed to save the address of the Main DeviceObject and use it when i needed to enter the package, but i think that isn;t even possible since maybe it has something to do with the Passing through of the IRP and the completion of it(what maybe would explain the error)? I tryed alot of things now and i im stuck now, can anyone help me on the right way in getting the Main Device Object so i can add my own package? btw the error that i got all the time was DRIVER_IRQL_NOT_LESS_OR_EQUAL. PCONTROL_DEVICE_EXTENSION deviceExtension; ULONG dwDataWritten = 0; KIRQL prevIrql; MOUSE_INPUT_DATA data[2]; ULONG inputConsumed; if(DeviceObject != ControlDeviceObject) { return FilterPass(DeviceObject, Irp); } deviceExtension = ControlDeviceObject->DeviceExtension; if(!deviceExtension->Deleted) { status = STATUS_SUCCESS; irpStack = IoGetCurrentIrpStackLocation (Irp); switch (irpStack->MajorFunction) { case IRP_MJ_DEVICE_CONTROL: switch (irpStack->Parameters.DeviceIoControl.IoControlCode) { case IOCTL_MY_OWN_IOCTL: status = Ioctl_BufferedIo(Irp, irpStack, &dwDataWritten); if (status == STATUS_SUCCESS) { inputConsumed = 0; data[0].UnitId = 0; data[0].Flags = MOUSE_MOVE_ABSOLUTE; data[0].Buttons = 0; data[0].RawButtons = 0; data[0].LastX = 0; data[0].LastY = 0; data[0].ExtraInformation = 0; data[1].UnitId = 0; data[1].Flags = MOUSE_MOVE_ABSOLUTE; data[1].Buttons = 0; data[1].RawButtons = 0; data[1].LastX = 0; data[1].LastY = 0; data[1].ExtraInformation = 0; KeRaiseIrql(DISPATCH_LEVEL, &prevIrql); (*(PSERVICE_CALLBACK_ROUTINE) deviceExtension->UpperConnectData.ClassService)( deviceExtension->UpperConnectData.ClassDeviceObject, &data[0], &data[1], &inputConsumed); KeLowerIrql(prevIrql); } break; default: status = STATUS_INVALID_PARAMETER; break; } default: break; } } else { status = STATUS_DEVICE_REMOVED; } Irp->IoStatus.Status = status; Irp->IoStatus.Information = dwDataWritten; IoCompleteRequest (Irp, IO_NO_INCREMENT); return status; } Tag: How can I determine the size of one cluster? Tag: 76773
  - 18
    - Monitoring WWAN OIDs Through NDIS IM Driver Is there a way for an IM driver to monitor WWAN OIDs? My IM driver binds to NDISWAN but is only able to see WAN OIDs and indications. Thanks! Tag: How can I determine the size of one cluster? Tag: 76768
  - 19
    - Monitoring TAPI OIDs Through NDIS IM Driver Is there a way for an IM driver to monitor TAPI OIDs/indications? My IM driver binds to NDISWAN but is only able to see WAN OIDs and indications. Thanks! Tag: How can I determine the size of one cluster? Tag: 76767
  - 20
    - drivers for embedded graphics Hello. Anyone know anything about embedded VIA UniChrome chips? I want to run NT4 server on a CLE266 board with embedded UniChrome 3D. I don't care about 3D or video accelleration, but I do want something more than 640x480x4 resolution. VIA doesn't have an NT driver for the CLE266 board, but I did find an NT driver for an M400 board with embedded UniChrome Pro. Could that driver be used to set display resolution? (A VIA tech suspected 'no' but was not certain.) Barring that, how difficult would it be to develop an NT driver that provided no chip-specific functionality besides mode change? thanks, nf Tag: How can I determine the size of one cluster? Tag: 76766
  - 21
    - Max contiguous memory buffer size Hi! I have a Windows 2003 Server x86 64bit running on system with 16Gb memory. How much contiguous memory can I allocate for device DMA buffer? Device is the PCI-x adapter with 64bit address bus. I want to get 4Gb DMA buffer. Are there any reccomendations to tune operationg system for getting maximum size DMA buffer? Thanks! Tag: How can I determine the size of one cluster? Tag: 76762
  - 22
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Hi, all
How can I determine the size of one cluster in specified file system, such
as FAT32 or NTFS?
It is known that:
the Default Cluster Sizes can be decided by volume size.
for example(For NTFS):

Volume Cluster
0 to 512 MB ----- 512 bytes
513 MB to 1 GB ----- 1 KB
1025 MB to 2 GB ----- 2 KB
2 GB and greater ----- 4 KB
But how can I get this exact information from system (or some place on disk)?

Thanks a lot!

Re: How can I determine the size of one cluster? by Maxim

Maxim
Thu Mar 09 03:45:29 CST 2006

Can GetDiskFreeSpace/NtQueryVolumeInformationFile help?

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"sherrylso" <sherrylso@discussions.microsoft.com> wrote in message
news:25160F51-A1C7-430C-A81B-413157ECA788@microsoft.com...
> Hi, all
> How can I determine the size of one cluster in specified file system, such
> as FAT32 or NTFS?
> It is known that:
> the Default Cluster Sizes can be decided by volume size.
> for example(For NTFS):
>
> Volume Cluster
> 0 to 512 MB ----- 512 bytes
> 513 MB to 1 GB ----- 1 KB
> 1025 MB to 2 GB ----- 2 KB
> 2 GB and greater ----- 4 KB
> But how can I get this exact information from system (or some place on disk)?
>
> Thanks a lot!
>
>
>
>

Re: How can I determine the size of one cluster? by sherrylso

sherrylso
Thu Mar 09 23:47:27 CST 2006

Thanks!

"Maxim S. Shatskih" wrote:

> Can GetDiskFreeSpace/NtQueryVolumeInformationFile help?
>
> --
> Maxim Shatskih, Windows DDK MVP
> StorageCraft Corporation
> maxim@storagecraft.com
> http://www.storagecraft.com
>
> "sherrylso" <sherrylso@discussions.microsoft.com> wrote in message
> news:25160F51-A1C7-430C-A81B-413157ECA788@microsoft.com...
> > Hi, all
> > How can I determine the size of one cluster in specified file system, such
> > as FAT32 or NTFS?
> > It is known that:
> > the Default Cluster Sizes can be decided by volume size.
> > for example(For NTFS):
> >
> > Volume Cluster
> > 0 to 512 MB ----- 512 bytes
> > 513 MB to 1 GB ----- 1 KB
> > 1025 MB to 2 GB ----- 2 KB
> > 2 GB and greater ----- 4 KB
> > But how can I get this exact information from system (or some place on disk)?
> >
> > Thanks a lot!
> >
> >
> >
> >
>
>