w3hello.com logo
Home PHP C# C++ Android Java Javascript Python IOS SQL HTML videos Categories
Create a symbolic link (or other NTFS reparse point) in Windows Driver
There isn't direct API to create reparse points. You need to use ZwFsControlFileZwFsControlFile() to send FSCTL_SET_REPARSE_POINT ioctl with appropriate input buffers and parameters. Don't have example though!

Categories : Windows

Android app installer displays wrong information about required disk space
I'm not sure if this will work: Try restarting your device and then install the app. i was encountering the same problem which got solved by doing the above.

Categories : Android

.NET Windows Services (WTSSendMessage) : Displays message on XP but not Windows 7
I believe that this maybe part of Windows Messenger that is not present in Windows 7. This link shows why (RPC disabled by default) and possible solution: By default remote RPC is disabled on Windows 7. It can be enabled by setting the 'HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal Server' value 'AllowRemoteRPC' to 1. However, this will only get you another error - 0x721 - which I am guessing is caused by Windows 7 not allowing 'nul' user access. There are several possible ways around this problem but I haven't tried any of them. One approach would be to add credentials from remote machines to the credential cache on the sending machine but I don't know how practical that is. There may be a way to allow 'nul' user access but that is probably not a good idea either. And t

Categories : C#

How do I open the root.disk in linux?
You need to mount this image before you can access it, try the following: mkdir olddisk sudo mount -o loop /path/to/root.disk olddisk You should now be able to access the data inside this container.

Categories : Linux

How to get the number of connected displays to a gpu on Linux?
The most analogous approach under Linux would be to use the NVCtrl API which is what nvidia-settings, the linux NVIDIA control panel application, provides. How to download the nvidia-settings source package is documented in the linux driver release notes. Specifically, you can find various packages for specific driver versions here Choose a package that is closest to your driver version. Once you have downloaded and unzipped the nvidia-settings source, you will find a samples directory. In that directory is a sample program which has the necessary framework for what you want. Specifically, look in nv-control-targets.c. The following function in that file will do what you want: /* Connected Display Devices on GPU */ ret = XNVCTRLQueryTargetAttribute(dpy,

Categories : Linux

Best Ways to reduce Disk IO On Linux Server
Your servers shouldn't crash due to disk IO. They stop, but don't crash, everything gets real slow, but crash?? Seems extreme. What time do they crash at? 8am? What happens if you reboot them? Did you say webapp? hmmm.. Dru You could reduce IO by using smaller drives, hehe I've got some, definitely reduced IO!!

Categories : Mysql

Determine linux driver that owns a disk
You can see the kernel log dmesg | grep sda <...> [ 0.618438] sd 2:0:0:0: [sda] Attached SCSI disk <...> The log is talking about a scsi disk, and sd 2:0:0:0 is the device that generated that message. You can inspect the sysfs for more details: cd /sys/block/ cd /sys/block/sda/ Here you can find the information about all your block devices. If you look into the directory of your specific device you should see its information. Here the information about the scsi bus. There are two directories: drivers and devices. cd /sys/bus/scsi cd /sys/bus/scsi/devices cd /sys/bus/scsi/drivers Here there is the list of drivers on the scsi bus. ls /sys/bus/scsi/drivers sd sr The log said sd 2:0:0:0 cd /sys/bus/scsi/drivers/sd/2:0:0:0 Here my device, so sd is my driver. Th

Categories : Linux

Python: check if two Linux paths are on same physical disk
Look at the hex output. The first number after the 0x prefix indicates the device driver: >>> hex(os.stat("/usr").st_dev) '0x801L' This is a 'SCSI' disk, because all of them have ID 8. Reference: https://www.kernel.org/doc/Documentation/devices.txt. Drive ID and partition number are encoded in the remaining part of the st_dev. The exact transformation for major ID and minor ID as implemented by glibc is as follows: >>> minor = int(os.stat("/lib").st_dev & 0xff) >>> major = int(os.stat("/lib").st_dev >> 8 & 0xff) >>> major, minor (8, 1) Meaning major number 8 (SCSI host adapter), minor number 1. The minor number encodes drive number as well as partition. As can also be inferred from here, all partitions on the first disk have a minor

Categories : Python

Does writing data to stdout in linux occupy disk space?
Unless the output is being redirected (though pipes to e.g. tee, or to a file with the > shell redirection operator), then no, output will not go to a file system. Output to a console (or terminal emulator) is slow as it is, passing it through the file system would make it even slower, and may not allow the disks to spin down if there's a lot of output. It may, however, end up in the swap space, if the OS thinks the process should be swapped out before the output is actually written.

Categories : Linux

How to force a Linux C Executable to access the disk for fetching data
You can flush the memory cache by doing this (as root): sync echo 3 > /proc/sys/vm/drop_caches The various values drop_caches accepts are: To free pagecache: echo 1 > /proc/sys/vm/drop_caches To free dentries and inodes: echo 2 > /proc/sys/vm/drop_caches To free pagecache, dentries and inodes: echo 3 > /proc/sys/vm/drop_caches You'll need 3 to drop everything.

Categories : C

Is there a way to tell in linux if a binary program that is running matches file on the disk?
I am not sure what do you mean exactly. use pid matching (compare ps output and getpid() in the server) use /proc/$pid/environ and find _=path_to_someServer (there is the binary) use diff /proc/$pid/exe someServer ("type someServer" to get full path)

Categories : Linux

Write C++ on Windows but use Linux System calls through a Linux emulator
You've already tagged your question with Cygwin. That seems like the best solution for what you want. Cygwin is basically a collection of programs which emulate a GNU/LInux environment through the use of a DLL (cygwin1.dll) which acts as a Linux API layer providing substantial Linux API functionality. Here's the link to the documentation for its API Edit: Most of the Cygwin source code that I've looked at is written in C++ and makes system calls using MS Windows API to do provide the *nix emulation. The source is well written and very readable (even to to a non-C++ programmer such as myself). I think using Cygwin would be a good transition from programming on Windows to a GNU/Linux environment.

Categories : C++

How to get Windows key from disk that cannot boot?
Just for anyone having the same problem, I found this program http://www.nirsoft.net/utils/product_cd_key_viewer.html , that can find the keys also for external drives, choosing as source the WindowsSystem32configSOFTWARE file.

Categories : Misc

moving rows up and down on ext grid using ext4
It might be a lot easier to add an extra field to the store/model that ranks the records. This way you only have to change the rank-number and then filter the store. This should keep your selection intact. If you don't want this rank-field to be synced to the proxy, set the "persist" property false on the field. That's anyway better than using private parameters on the remove method.

Categories : Extjs

how to retrieve the disk signature of all the disks in Windows using Delphi 7?
Depends what a "disk signature" is. i don't know what that is. i do know the following code returns: - \?ide#disksandisk_sdssdx120gg25___________________r201____#5&20f0fb49&0&0.0.0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b} - \?ide#diskst1000dm003-9yn162______________________hp13____#5&33aaabee&0&1.0.0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b} Are those "disk signatures"? It uses the Windows Setup API: procedure GetDisks(slDisks: TStrings); var InterfaceDevInfo: HDEVINFO; index: DWORD; status: BOOL; Name: string; begin { Get the interface device information set that contains all devices of event class. } InterfaceDevInfo := SetupDiGetClassDevs( @GUID_DEVINTERFACE_DISK, nil, // Enumerator

Categories : Windows

How to get the total size of hard disk of Windows machine?
Look at GetDiskFreeSpaceEx(), which has an lpTotalNumberOfBytes output parameter. It is subject to per-user disk quotas, though. If you need the raw byte size of the physical disk, use CreateFile() to open a handle to the desired disk and then use DeviceIoControl(), specifying the IOCTL_DISK_GET_LENGTH_INFO control code, to get the disk's total byte size.

Categories : Windows

Store common queries on disk with Mysql and windows
Why not consider something like Redis for caching? It's an in memory data store and it's very popular right now. Sites using Redis: http://blog.togo.io/redisphere/redis-roundup-what-companies-use-redis Redis also can persist data to disk: http://redis.io/topics/persistence For caching though, saving to disk shouldn't be absolutely critical. The idea is that if some data is not cached, the worst case is not always loading from disk manually, but going straight through to your database.

Categories : Mysql

How to get raw disk access in Java with write permissions - Windows 7
Your problem is that new RandomAccessFile(drivepath, "rw") uses flags which are not compatible to raw devices. For writing to such a device, you need Java 7 and its new nio classes: String pathname; // Full drive: // pathname = "\\.\PhysicalDrive0"; // A partition (also works if windows doesn't recognize it): pathname = "\\.\GLOBALROOT\ArcName\multi(0)disk(0)rdisk(0)partition(5)"; Path diskRoot = ( new File( pathname ) ).toPath(); FileChannel fc = FileChannel.open( diskRoot, StandardOpenOption.READ, StandardOpenOption.WRITE ); ByteBuffer bb = ByteBuffer.allocate( 4096 ); fc.position( 4096 ); fc.read( bb ); fc.position( 4096 ); fc.write( bb ); fc.close(); (answer taken from another (similar) question)

Categories : Java

ComboBox displays repeated Items in Windows 8 Surface
Combo box uses CarouselPanel as ItemsPanel, you need to change to StackPanel, then your problem will be solved. Here's detailed blog regarding that. I hope it might help you. Windows 8′s combobox and the carouselpanel winRT ComoBox: suggestions to replace it with standard dropdown behavior?

Categories : C#

windows azure virtual machine hard disk backups
Azure attached disks, just like the OS disk, is stored as a vhd, inside a blob in Azure Storage. This is durable storage: triple-replicated within the data center, and optionally geo-replicated to a neighboring data center. That said: If you delete something, it's instantly deleted. No going back. So... then the question is, how to deal with backups from an app-level perspective. To that end: You can make snapshots of the blob storing the vhd. A snapshot is basically a linked list of all the pages in use. In the event you make changes, then you start incurring additional storage, as additional page blobs are allocated. The neat thing is: you can take a snapshot, then in the future, copy the snapshot to its own vhd. Basically it's like rolling backups with little space used, in the event

Categories : Azure

How to format disk with setting allocation unit size to 64K on Windows XP using CMD
Your allocation size parameter is wrong. For 64K units, you should use /a:64K. /a:<UnitSize> Specifies the allocation unit size to use on FAT, FAT32, or NTFS volumes. If you do not specify UnitSize, it is chosen based on volume size. Default settings are strongly recommended for general use. The following list presents valid values for NTFS, FAT, and FAT32 UnitSize: 512 1024 2048 4096 8192 16K 32K 64K FAT and FAT32 also support 128K and 256K for a sector size greater than 512 bytes. Therefore, your batch file should use start /wait cmd /q /c format f:StorageGroup3 /fs:ntfs /v:SG3Logs /a:64K /q /y See the MSDN documentation for format for more information, or type help format from a command prompt.

Categories : Batch File

how to find, using Delphi 7, that a (physical) disk with a specific number (0 .. n) exists in Windows?
Use CreateFile() to open "\.PhysicalDriveX" as the filename, where X is the desired number, and see if it succeeds or fails. Even if it fails, you can still check if the error is due to the device not being present versus not being accessible (which implies that it exists).

Categories : Windows

No permission to write to disk on Windows Server 2008 from .NET application with log4net
You should put a folder name in the: <file value="MyServiceLog.txt" /> Change it to: <file value="c:dirIownMyServiceLog.txt" /> than make sure you give access to the user on c:dirIown

Categories : C#

json data for Ext4 store which requires a root element using SPRING MVC
Wrap the list in an object: @ResponseBody Users where class Users { public List<User> items; } And yes, brackets [] are used for JSON arrays.

Categories : Json

How to detect the disk full error and let program resume after getting free disk space
Check the return value of each call to fprintf() and fwrite(). If either call returns a negative value, check errno to see if errno is equal to ENOMEM or EDQUOTA. If so, you're probably out of disk space. As for resuming the operation as if nothing ever happened; that's a little bit harder; you'll need to keep track of what data you successfully wrote to the disk, so that after you've notified the user and they've indicated that it's time to try again, you can resume writing that data from the point at which the error occurred. That means keeping the state of the write in a structure of some sort (i.e. not just on the stack) so that you can return from your writing-function and then resume it later on. (Either that, or do the writing in a separate thread, and have the thread notify th

Categories : C++

Mongodb exists after claiming that there is no disk space while disk was not full
This is a bug in MongoDB. As of today it remains unresolved. The best advice I can give you is to ensure you have plenty of available disk space at all times.

Categories : Mongodb

How to get to last NTFS MFT record?
The MFT location isn't always fixed on the volume. You should get the starting MFT offset from the boot sector (sector 0 of the volume, you can find the structure online). The first file in the MFT is the "$MFT" file which is the file record for the entire MFT itself. You can parse the attributes of this file like any other file and get it's data run list. When you know the size of each fragment in clusters, parse the last cluster for each 1024 byte record of the last fragment (although I believe a fragmented MFT is rare). The last record in the MFT is the last record in that particular cluster marked "FILE0", if you encounter a null magic number that would be 1024 bytes too far. Or you can just get the file size from it's attributes and calculate the offset to the end of the MFT based o

Categories : Windows

NTFS vs. File Share
Short answer: No. In Windows each file and directory has an ACL controlling access to it. Each file share also has an ACL controlling access to the share. When you access a remote file through a share you are doing so using the credentials used to login to the local computer. (You can connect using different credentials by entering a username/password when connecting). The remote computer tests the supplied credentials against the ACL on the share. Once you are past that, then every file you attempt to access on the remote machine through this connection will be checked using your credentials against the ACL on the file and the share. This allows a file share to offer more restricted access to some files than if the same user were attempt to access them locally. (So you could share file

Categories : Misc

AIX 7.1 failed disk, need to figure out what physical disk this is?
Use diag. $ diag <enter> Task Selection Hot Plug Task SCSI Hot Swap Manager Identify a Device Attached to a SCSI Hot Swap Enclosure Device It should blink the LED of the device you requested.

Categories : Misc

What is the difference between HDFS and NTFS and FAT32?
... Because NTFS and FAT aren't Distributed. The advantage of HDFS is that it is. See the HDFS Introduction.

Categories : Hadoop

NTFS - file record size
It's not actually that much of a waste. You should try to look at what happens when the number of attributes stored in the file record exceeds 1 KB. (by adding additional file names, streams, etc.) It is not clear (to me at least) for different versions of NTFS if the additional attributes are stored in the data section of the volume or in another File Record. In previous versions of NTFS the size of a MFT File Record was equal to the size of a cluster (generally 4KB) which was a waste of space since sometimes all the attributes would take less than 1 KB of space. Since NT 5.0 (I may be wrong), after some research, Microsoft decided that all MFT File Records should be 1KB. So, one reason for storing that number may be backwards compatibility. Imagine you found an old hard drive which stil

Categories : File

NTFS Journal USN_REASON_HARD_LINK_CHANGE event
As always with the USN, I expect you'll need to go through a bit of trial and error to get it to work right. These observations/guesses may, I hope, be helpful: When the last hard link to a file is deleted, the file is deleted; so if the last hard link has been removed you should see USN_REASON_FILE_DELETE instead of USN_REASON_HARD_LINK_CHANGE. I believe that each reference number refers to a file (or directory, but NTFS doesn't support multiple hard links to directories AFAIK) rather than to a hard link. So immediately after the event is recorded, at least, the file reference number should still be valid, and point to another name for the file. If the file still exists, you can look it up by reference number and use FindFirstFileNameW and friends to find the current links. Comparin

Categories : Windows

Viewing Ciphertext of Encrypted File on NTFS (EFS)
The way you open an encrypted file in order to read its raw encrypted contents (e.g. for a backup/restore application) is to use the: OpenEncryptedFileRaw, ReadEncryptedFileRaw, WriteEncryptedFileRaw, and CloseEncryptedFileRaw api functions. Writing the code on the fly, in a hypothetical hybrid language: void ExportEncryptedFileToStream(String filename, Stream targetStream) { Pointer context; res = OpenEncryptedFileRaw("C:UsersIanwallet.dat", 0, ref context); if (res <> ERROR_SUCCESS) RaiseWin32Error(res); try { res = ReadEncryptedFileRaw(exportCallback, null, context); if (res != ERROR_SUCCESS) RaiseWin32Error(res); } finally { CloseEncryptedFileRaw(context) } } function ExportCallback(pbData: PBYTE, pvCallbackCo

Categories : Windows

ListBox displays "System.Windows.Forms.ListBox.Items.Count..."
To write the items, change the line that does the write to: rollLog.WriteLine(lstBoxOut.items[count]); To read it back in: private void btnReadFile(object sender, EventArgs e) { lstBoxOut.Items.Clear(); foreach (string line in File.ReadLines("Roll Results.txt")) { lstBoxOut.Items.Add(line); } } The reason you're getting that output "System.Windows.Forms.ListBox...." is because the statement rollLog.WriteLine(lstBoxOut) is equivalent to rollLog.WriteLine(lstBoxOut.ToString()). The ToString() method returns A string that states the control type, the count of items in the ListBox control, and the Text property of the first item in the ListBox, if the count is not 0.

Categories : C#

NTFS sparse file data runs ($UsnJrnl)
No, it means that $UsnJrnl occupies 2576 clusters on disk. Sparse clusters don't occupy any space on disk, if you'd try to read sparse cluster, e.g. cluster 10 in your example, NTFS just returns zeros. Generally, you can't determine start and end cluster of the file, since files can be fragmented - your example says that first 1408 clusters are not allocated on disk at all, then 128 clusters of that file occupy disk clusters 510119 - 510247, then 2448 clusters of the file occupy disk clusters 256 - 2704; so in this case you can't say that file begins by cluster X (on disk) and ends by cluster Y (on disk) - it's possible only if file is not fragmented (when it uses only one cluster run).

Categories : Windows

How does NTFS handle the conflict of short file names?
NTFS won't create two short names like that. The first will be THISIS~1.txt and the second will be THISIS~2.txt. For example, open a command prompt and from the root of C: drive type C:>dir prog* /x /ad<Enter> On a Windows 7 64-bit system you will see output similar to this 03/28/2013 12:24 PM <DIR> PROGRA~1 Program Files 07/31/2013 11:09 AM <DIR> PROGRA~2 Program Files (x86) 12/10/2012 05:30 PM <DIR> PROGRA~3 ProgramData

Categories : Windows

access to ntfs stream for a very long filename fails
As the very helpful page on CreateFile says referring to the lpFileName parameter which specifies the filename: In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "?" to the path. Since you are contemplating BackupRead obviously you are wanting to access this stream programatically. If so, test things programatically. Trying all these operations from the command prompt is a crap-shoot and will not establish anything more than the ability to perform such operations from the command prompt. With that in mind, let's try this simple program - boilerplate code removed: #include "stdafx.h" int APIENTRY _tWinMain(HINSTANCE, HINSTAN

Categories : Windows

Cloning an OS disk onto a smaller disk
Acronis Clone Disk worked for me with some options settings, set the move method to Manual and then we get the option to "Change Disk Layout" and control how the unused space from the bigger disk will be shrunk when moving to smaller disk.. The destination disk is fine and bootable now!

Categories : Misc

How to make Gradle stop trying to chmod MANIFEST.MF on an NTFS drive
Gradle is trying to set default permissions for that file, and I can't see a way to stop it from doing that. (You could make it set different permissions, but I guess that won't help.) Under Windows/NTFS this normally works just fine, so it might be a problem with you Linux NTFS driver or configuration.

Categories : Linux

How to get windows size from Linux
The issue has nothing to do with PuTTY per se, and everything to do with SSH clients and pseudoterminals in general. To avoid this issue, configure your PuTTY to use a pseudoterminal. (In the TTY panel, there is a "Don't allocate a pseudoterminal" checkbox. Make sure it is not checked.) With ssh, you need to use the -t option to tell ssh to use a pseudoterminal. Here is a simple example program you can use in Linux to obtain the terminal size. It does not require curses: #include <unistd.h> #include <sys/ioctl.h> #include <errno.h> #include <stdio.h> static int get_size(const int fd, int *const rows, int *const cols) { struct winsize sz; int result; do { result = ioctl(fd, TIOCGWINSZ, &sz); } while (result == -1 &&

Categories : C



© Copyright 2017 w3hello.com Publishing Limited. All rights reserved.