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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

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 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

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

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

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

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

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 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

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

linux: running self compiled kernel in qemu: VFS: Unable to mount root fs on unknown wn-block(0,0)
maybe your system image file is bad and can not be mounted. You may try these command to mount the image file and check if it is a valid root file system for linux. losetup /dev/loop0 /var/lib/libvirt/images/Debian.img kpartx -av /dev/loop0 mount /dev/mapper/loop0p1 /mnt/tmp

Categories : Linux

Kernel crash - unable to handle kernel NULL pointer dereference at 000002c0
This is not exact answer. But I hope guide you some extent. __udp4_lib_rcv+0x16f/0x680 is the trouble maker. offending instruction is 0x16f bytes from the start of the function __udp4_lib_rcv with 0x680 bytes long in total. I suggest to reproduce the issue and investigate in this area.

Categories : C++

"scripts recordmcount: Syntax error" when I try to build a linux kernel module on a 64-bit 3.9 kernel
This was an issue of cross-compiling. I used a 32-bit Ubuntu system to build a 64-bit kernel and it's been nothing but headaches. Apparently the scripts etc still get built as 32-bit. (They'd have to since my 32-bit system needed to use them to build the kernel.) But then if bring that /usr/src/linux-headers-x.x.x dir over to my 64-bit system I can't use it to build any kernel modules because its /scripts dir is 32-bit. I rebuilt recordmcount on the 64-bit machine and that worked. But then there was another script that was incompatible with 64-bits, that wasn't as easy to build without rebuilding the entire kernel. Anyway, if you cross compile you don't get a /usr/src/linux-header-x.x.x/scripts dir that's usable on your target system.

Categories : Misc

How to port a linux driver , which is compiled in 2.6 kernel ,without compiling in other new version of kernel
now it's not possible: usually, a "driver" is a binary kernel-module porting will involve code-changes to the kernel module. if you change the code, you need to compile it, in order to get a binary. since kernel modules run in kernel space, it is crucial that they are robust. since parts of the kernel-API change every now and then, trying to use a module compiled for kernel-X with another kernel-Y, might either not load because of missing symbols (if you are lucky) or lead to a kernel panic because semantics have changed. btw, all this is not really related to 2.6.x vs 3.y, but holds true for any kernel version but then: of course in theory it is possible to "write" a kernel-module as binary code in your favourite hex-editor, without resorting to compilers and such. this would allow yo

Categories : Linux

Linux Kernel - stoping a running kernel timer from user space
Have you considered trying netlink? It's a powerful method for user-to-kernel (or process-to-process) communication which both simple and lightweight.

Categories : Linux

Are the services offered by the linux kernel implemented as kernel threads?
Some are, some aren't. The terms "process management" and "memory management" are kind of broad and cover a fair bit of kernel code. For memory management, a call to mmap() will just require changing some data structures and can be done by the current thread, but if pages are swapped out it will be done by kswapd, which is a kernel thread. You might consider the scheduler a special case: since the scheduler is responsible for scheduling all threads, it itself is not a thread and does not execute on any thread (otherwise it would need to schedule itself... but how would it schedule itself, if it had to schedule itself first in order to do that?). You might think of the scheduler as running directly on each processor core when necessary.

Categories : Multithreading

Error while compiling C++ kernel module with Android kernel for Nexus 7
To find out the compilation parameters used in gcc (or g++), you should use "make V=1" against the makefile. but the error: error: 'void*' is not a pointer-to-object type looked more like a C++ error, which is inherent in your code (Android kernel does not use C++). This seemed to be solvable by recasting: Error: ‘void*’ is not a pointer-to-object type C++. Error: void is not a pointer-to-object type. etc.

Categories : Android

How to load a modified kernel module which is already exist in precompiled kernel
This error shows up because already the bitmap_close_sync symbol is exported by the kernel, again you are trying to re-export the same symbol in md_mod module. Try not to export the symbol, compile and try inserting the module (module should be compiled against the kernel version on which it is inserted). Go through stackoverflow link What will happen if two kernel module export same symbol. Hope it answers your question :-).

Categories : Linux

Kernel# gets stuck and Kernel#system does not when issuing gzip without any options
The backticks operator implicitly redirects the standard output of the resulting subshell (which it does to capture the subshell's output) while system doesn't. You can observe the same hang using system as follows: system('gzip > /tmp/foo') This explicitly captures standard output and will hang in the same way. When gzip has its output redirected it will wait for input until an EOF or other signal is received. Without output redirection it will issue the error message you mention. You can get the same effect from a regular bash shell: $ gzip gzip: compressed data not written to a terminal. Use -f to force compression. For help, type: gzip -h And: $ gzip > /tmp/foo ... Where ... indicates that gzip will hang until it receives an appropriate signal.

Categories : Ruby

Can we only recompile a kernel module in kernel source tree?
Probably linux kernel 2.6.32.el6 has been compiled with modversions but your module was compiled without it. Check if you have CONFIG_MODVERSIONS selected or deselected in your kernel config file. Compare it with /proc/.config file which is the kernel confguration file - of course if you have it. In other words - probably your linux kernel requires that modules supports versioning, but your module doesn't provide it.

Categories : C

In linux, all kernel processes share the same kernel stack, each user process has its own stack, correct?
Incorrect. There's one kernel address space, and no kernel processes. There are kernel threads, and there are user space threads that enter the kernel. These run in the kernel address space. Each of these has a separate stack, within the kernel address space.

Categories : Linux

Can a user thread directly enter kernel w/o a kernel thread being called?
Yes, they can. User threads enter the kernel all the time for system calls, interrupts and exceptions. While the kernel is handling one of these it is running in kernel mode in the context of the user thread (and uses that thread's kernel stack). In fact, a "kernel thread" is defined as a scheduled task that never exits the kernel.

Categories : Linux

Would turning off feature in kernel cause kernel module(using feature) to misbehave?
CONFIG_HUGETLBFS can disable the user-space API, and CONFIG_TRANSPARENT_HUGEPAGE can disable automatic creation of huge pages for generic memory. However, huge pages are an integral part of the x86 memory management code and are used for things like direct mappings or large MMIO regions. You cannot simply switch off huge pages. When you are working with the MM code, you cannot avoid worrying about huge pages.

Categories : Linux

mount unmount without sudo
You must add /nfs entry to /etc/fstab on the server host. In the list of options of the entry must be option user or users (depends on that if you want that user could unmount the filesystem or not). Example: xx.xx.xx.xx:/ /nfs nfs rsize=4096,wsize=4096,user 0 0

Categories : Linux

Oracle 11g startup and mount
fix it: Connect to DB: Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> shutdown immediate; Database aready shutdown. Aready uninstall database. ORACLE instance aready close. SQL> startup nomount; ORA-12514: TNS: listner process can't recognize current service of connection describe string监听程序 SQL> startup nomount; ORA-24324: service handle not initialized ORA-01041: internal error, hostdef extension name not exists SQL> conn sys/sys as sysdba; Aready connect to idle instance SQL> startup; ORACLE instance started。 Total System Global Area 535662592 bytes Fixed Size 1334380 bytes Variable Size 234881940 bytes Data

Categories : Oracle

How to mount an attached EC2 volume in CLI?
I'm not sure if this is a good answer, try running: lsblk /dev/sdi And it may list partitions that exists on that drive like this: sdi |--sdi1 |--sdi2 |--sdi3 If you have something like sdi1 you can try to mount it: mount /dev/sdi1 /your/folder/here Hope it helps.

Categories : Linux

Mount other users hive with C# .net
You can call the RegLoadKey API method using platform invoke. [DllImport("advapi32.dll", SetLastError = true)] static extern Int32 RegLoadKey(IntPtr hKey, string lpSubKey, string lpFile);

Categories : C#

How to mount a snapshot from boto?
The attach_volume method takes an instance_id and a volume_id but you are passing objects. Try this: c.attach_volume(volume.id, instance.id, "/dev/sdh") The device_name should be a reasonable device name for the OS you are using. You can find more about what that value should be here. boto uses standard Python logging so you can configure it to log as much or as little as you want. This gist shows a shortcut approach to get full debug logging. However, boto can only log what it has access to and it's possible the response from EC2 just doesn't provide much information.

Categories : Amazon

Mount to local directory without Fuse.
In short, no. If your host wont enable FUSE or any other kernel module that allows you to mount filesystems in user space, then there's nothing you can run yourself. Your best bet is to check if your VPS has a module installed specifically for FTP filesystems, or get the host to install one, or get the host to enable FUSE.. or just move on to a different host.

Categories : Linux

mount: nfs access denied by server
Is there a config file on the NAS where to put allowances for clients? E.g. in debian based OS the config file is "/etc/exports" and you would put there "/volume2/Asterisk_Recordings 192.168.1.1(rw,sync)" and activate this with "exportfs -a" (your NAS may do this automatically if you update the config via a web interface, I guess.) Check also Mounting NFS results in access denied by server.

Categories : Misc

LSF - Mount a cgroups.cpuset for jobs
Support for cpuset was released in LSF 9.1.1.1 (GA July 31, 2013). The feature adds a new parameter to lsf.conf LSB_RESOURCE_ENFORCE. You can set it to cpu, memory or both. You need to enable the cpu and memory affinity feature of LSF to use cpuset.

Categories : Linux

Scripted truecrypt mount, without using /dev/ or UUID
Use Disk ID instead: #!/bin/bash # Run this script as root to avoid entering the root password twice secret=0xa52f2c38 # Generate tempfile tempfile=fdisk.tmp sudo fdisk -l > $tempfile # -------------------------------------------------------------------------- # Locate secret drive and mount it # -------------------------------------------------------------------------- num=$[ $(grep -n "^Disk identifier: $secret" $tempfile | cut -f1 -d:) - 5 ] if [ $num > 0 ] # num will be greater than 0 if drive exists then # Get line containing /dev # ---------------------------------------------------------------------- dev=$(sed -n "${num}p" $tempfile | cut -f2 -d' ' | sed 's/://') truecrypt $dev /media/secret # Check (Create .truecrypt on the mounted volumen beforehand) # -----------

Categories : Misc

Mount Windows shared filder to AIX
Two options 1) The easiest would be to install the bos.cifs fileset and use smit to mount the share as a filesystem: http://www-01.ibm.com/support/docview.wss?uid=isg1fileset-1244257370 2) I would not recommend this for "newbies", but you may have better luck getting this to work by installing samba: www.samba.org

Categories : Unix

Attempt to mount remote nfs only when it is accessed
You can use automount for this. https://help.ubuntu.com/community/Autofs The example there shows how to automount an NFS share.

Categories : Misc

how to determine if the mount successful in QT code
You can check last error of a QProcess by using error and state functions (Documentation for "error" Documentation for "state"). "What if there is an error that is not in my condition." You can add something like this in your code: else if(connectSamba.state() == QProcess::NotRunning && connectSamba.error() >= 0) { LogWrite("Unknown error", Qt::red); return false; } Or, if you want to give more specific information, you can create a condition for each error code separately. Here's a list of codes. Alternatively, don't add the above block to the error checking code. Instead, create a slot to which you connect the error signal of connectSamba class: // add this line below "QProcess connectSamba;" line in mwDm::mountFolder connect(&connectSamba, SIGNAL(error(QPro

Categories : Qt

Icecast dont see mount point
Hey it looks like you made an error configuring Nicecast. You might want to read the following guide. Please note that Nicecast has an built-in Icecast server, make sure you are not using this one. As well not that Nicecast for some reason will kill any running Icecast server on the same machine where Nicecast is started. So you have to first start Nicecast and only afterwards start your Icecast Server. (This should not happen anymore after you have disable the built-in server though) Another issue I experience with some versions of Nicecast is that the Settings or at least some (like the Mountpoint Name) only take effect after restarting Nicecast. Additionally make sure your Mountpoint name is not /, as this is an impossible mountpoint name (it conflicts with the web interface).

Categories : Misc

C - How do I move a file from a cifs mount to local hdd
In all likelihood, if you interrogate errno after rename fails, you will find that it is set to EXDEV. May I suggest that you add that information or confirm that it is EXDEV. If you are getting EXDEV, then it is because of the Linux limitation that rename() only works if oldpath and newpath are on the same mounted file system. From rename(2) EXDEV oldpath and newpath are not on the same mounted file system. (Linux permits a file system to be mounted at multiple points, but rename() does not work across different mount points, even if the same file system is mounted on both.)

Categories : C

mount remote windows share from centos
The mount.cifs file is provided by the samba-client package. This can be installed from the standard CentOS yum repository by running the following command: yum install samba samba-client Once installed, you can mount a Windows SMB share on your CentOS server by running the following command: Syntax: mount.cifs //SERVER_ADDRESS/SHARE_NAME MOUNT_POINT -o user=USERNAME SERVER_ADDRESS: Windows system’s IP address or hostname SHARE_NAME: The name of the shared folder configured on the Windows system USERNAME: Windows user that has access to this share MOUNT_POINT: The local mount point on your CentOS server I am mounting to a share from \10.11.10.26snaps Make a directory under mount for your reference mkdir /mnt/mymount Now I am mounting the snaps folder from indiafps02, User

Categories : Linux

Android - Mount a Samba share in code
Probably smbfs/cifs are currently not supported by your kernel. As Delyan said, ensure your kernel can mount these filesystem : $ cat /proc/filesystems nodev sysfs nodev rootfs nodev bdev nodev proc nodev cgroup nodev tmpfs nodev debugfs nodev sockfs nodev usbfs .... If they are not listed, you should try to do a modprobing (sometimes the module you want just have to be activated), get root access then : # modprobe <modulename(without.ko)> e.g. : # modprobe cifs If it doesn't work you will have to change or recompile your kernel (including appropriate modules).

Categories : Android



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