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chkbit is a lightweight **bitrot detection tool**. chkbit is a lightweight **bitrot detection tool**.
bitrot (a bit flipping in your data) can occur
- at a low level on the storage media through decay (hdd/sdd)
- at a high level in the OS or firmware through bugs
chkbit is independent of the file system and can help you detect bitrot on you primary system, on backups and in the cloud. chkbit is independent of the file system and can help you detect bitrot on you primary system, on backups and in the cloud.
## What is bitrot?
0 bits flipped | 1 bit flipped | 2 bits flipped | 3 bits flipped
-------------- | -------------- | -------------- | --------------
![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Bitrot_in_JPEG_files%2C_0_bits_flipped.jpg/180px-Bitrot_in_JPEG_files%2C_0_bits_flipped.jpg) | ![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Bitrot_in_JPEG_files%2C_1_bit_flipped.jpg/180px-Bitrot_in_JPEG_files%2C_1_bit_flipped.jpg) | ![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Bitrot_in_JPEG_files%2C_2_bits_flipped.jpg/180px-Bitrot_in_JPEG_files%2C_2_bits_flipped.jpg) | ![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Bitrot_in_JPEG_files%2C_3_bits_flipped.jpg/180px-Bitrot_in_JPEG_files%2C_3_bits_flipped.jpg) |
Data degradation (aka bitrot) is the gradual corruption of computer data due to an accumulation of non-critical failures in a data storage device. It results from the gradual decay of storage media over the course of years or longer. Causes vary by medium.
**For more information** see [Wikipedia - Data_degradation](https://en.wikipedia.org/wiki/Data_degradation).
This is the successor to [chkbit/node](https://github.com/laktak/chkbit-py). It will use and upgrade the index files created by the node version. This is the successor to [chkbit/node](https://github.com/laktak/chkbit-py). It will use and upgrade the index files created by the node version.
## Installation ## Installation