Bscp – Secure and efficient copying of block devices

Bscp copies a single file or block device over an SSH connection, transferring only the parts that have changed.

In other words, it handles the edge case where rsync fails.

Download

git clone https://github.com/bscp-tool/bscp

bscp SRC HOST:DEST [BLOCKSIZE] [HASH]

The default BLOCKSIZE is 65536 (64 KiB).

The default HASH algorithm is sha256 (SHA-256).

Bscp is similar to the classic blocksync.py, but provides the following advantages:

It doesn't have to be installed on server side.
It uses a strong hash algorithm (SHA-256 instead of MD5) by default, and can use even stronger hash algorithms as long as they are supported by Python, such as SHA-512 or SHA3-512.
DEST is allowed to be larger than SRC. In that case, SRC is copied to the beginning of DEST and the end of DEST remains untouched.
The client-server protocol is designed to communicate in bigger chunks, so it is more suitable to network connections with bad latency.