bitrot | Detects bit rotten files on the hard drive
kandi X-RAY | bitrot Summary
kandi X-RAY | bitrot Summary
Detects bit rotten files on the hard drive to save your precious photo and music collection from slow decay.
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Top functions reviewed by kandi - BETA
- Parse command line arguments
- Runs the bitrot test
- Return a timestamp
- Return the path to bitrot
- Normalize path
- Commit a transaction
- Report progress
- Return a set of all bitrot paths
- Return a dictionary of all hashes
- Generate a stable hash of the bitrot database
- Update the sha512 integrity of the bitrot
- Get a sqlite3 cursor
- Handle unknown file
- Check the bitrot sha of the bitrot
- List existing files in a directory
- Report the contents of the database
- Compute the chunk of a file
- Compute the sha1 hash of a file
bitrot Key Features
bitrot Examples and Code Snippets
Community Discussions
Trending Discussions on bitrot
QUESTION
So we can add signatures to PDF files, which sign the content hash of the document. however, if one bit flips due to bitrot, the file will be corrupt and the signature worthless. Does PDF have some built in data integrity protection that would allow it to repair bitrot to a certain degree?
I'm aware that this can be achieved on a filesystem level, but I wonder if the PDF format itself also has facilities for this, and if so, how they can be enabled and whether they are included in PDF/A?
...ANSWER
Answered 2021-Jan-24 at 14:57Does PDF have some built in data integrity protection that would allow it to repair bitrot to a certain degree?
No. Quite the contrary, data streams in PDFs may be (and often are) compressed using FLATE. In uncompressed content streams a bit flip usually only damages a single instruction or two, often having only an effect on small parts of the page rendering. But in a compressed content stream it usually damages all instructions starting at the flip. If this happens early in the stream, the whole page cannot be rendered anymore.
QUESTION
I would like to programmatically test Windows ReFS Health Check and Recovery features.
Note: ReFS only detects bitrot (no self-healing). To have ReFS both detect and auto-heal, one must also use Storage Spaces. So, I have prepared a Storage Mirror Space pool S:\ with 2-way mirror setup.
ReFS integrity streams have been enable with,
...ANSWER
Answered 2018-Aug-29 at 19:12Sounds like you want to write to the underlying storage directly, bypassing the file system. This means writing straight to the disk/partition/volume.
In Windows, this can be done by working against lower-level constructs, such as \\.\PhysicalDrive0 - you can open a "file" handle to such a device and write directly to the sectors. You might find some low-level tools that do just that.
In Linux this is somewhat easier, since you can use dd to write to any block device.
If your Windows machine is a VM, then it might be easiest to edit the VHDX file (the "hard disk") from the host machine, perhaps using a HEX editor.
It might be a bit hard to map a specific file to the on-disk sectors containing its data runs. There are several methods of detecting where the data really is, but you may resort to a simple brute-force method of writing a specific piece of seemingly-unique data and simply scanning the entire disk to find it.
QUESTION
My question is quite similar to the one here except that I’m working with C.
I wrote some code to rotate an unsigned int; that is, the function bitRotate() (code below).
The function works very well when, instead of the printfs and scanfs, I directly put the literals I want to use, e.g. bitRotate(0xabcdef00,8);in the main function.
However, when I pass x as an argument as in the following code, abcdef00 that was got from the user, the x gets corrupted to ab000000. I checked and double checked and debugged my code multiple times and I am pretty sure the error is in this part but I don’t understand why.
...ANSWER
Answered 2019-Oct-24 at 14:17The bitRotate function is fine and so is the way you call it.
The actual culprit is here:
QUESTION
I'm getting ready to setup my first Ceph cluster (Luminous on Fedora) for production use, and thus far I've gone through the process of running a single OSD per node on a large ZFS pool so I have checksum-on-read bitrot protection with automatic repair (when possible).
The reason I've done this is because everything I've read is that Ceph doesn't really have bitrot protection in mind as one of its goals, including with Bluestore. Deep scrubbing works, but obviously has a heavy performance hit while running and more importantly, creates a window of time during which corrupt data can be read.
Today, though, I've read a few things about Bluestore around checksum-on-read that suggest I may have been incorrect. I cannot, however, find any documentation that seems to say authoritatively "this is what this does".
So hopefully this is a good outlet to ask: Can anybody speak with confidence on whether or not Bluestore provides bitrot detection and, with the help of other OSDs, automatic repair through its checksum mechanism?
...ANSWER
Answered 2017-Dec-18 at 08:48BlueStore very much has bitrot protection as one of its goals. It stores checksums for every block and validates them on reads. If they’re bad, it throws errors rather than returning known-bad data; that triggers the higher-level RADOS recovery mechanisms.
QUESTION
While trying to port an algorithm from C, I have determined that the AutoIT BitShift( ) function does sign extension if the high bit of a 32-bit field is set.
...ANSWER
Answered 2017-Jul-13 at 11:26I don't consider current BitShift() working wrong. Official documentation says this:
Bit operations are performed as 32-bit integers.
Since it doesn't say "as unsigned 32-bit integers", sign extension seems quite OK.
However, I don't see you point. If you know desired behavior, why not implementing custom function to fit your needs? Here is my variant:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install bitrot
You can use bitrot like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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