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- On-the-fly hashing of the transmitted data.
- Progress bar of how much data has already been sent.
- Wiping of disks with known patterns.
- Verification that the image is identical to the original drive, bit-for-bit.
- Simultaneous output to more than one file/disk is possible.
- The output can be split into multiple files.
- Logs and data can be piped into external applications.
The program only produces raw image files.
dcfldd if=/dev/sourcedirve hash=md5,sha256 hashwindow=10G md5log=md5.txt sha256log=sha256.txt hashconv=after bs=512 conv=noerror,sync split=10G splitformat=aa of=driveimage.dd
This command will read ten Gigabytes from the source drive and write that to a file called driveimage.dd.aa. It will also calculate the MD5 hash and the sha256 hash of the ten Gigabyte chunk. It will then read the next ten gigs and name that driveimage.dd.ab. The md5 hashes will be stored in a file called md5.txt and the sha256 hashes will be stored in a file called sha256.txt. The block size for transferring has been set to 512 bytes, and in the event of read errors, dcfldd will write zeros.