Using dd to duplicate disks

[TechTrainer11]

Can anyone show how dd can use MD5 when duplicating a hard drive

 

[RGM]

Can anyone show how dd can use MD5 when duplicating a hard drive

use dcfldd, a part of kali

 

[TechTrainer11]

thank you I meant how is the format of dd used

dd if=/dev/sda MD5 of=/root/sdb -bs=25k conv=noerror

 

[Michael Stout]

There isn't a way to run MD5 (or any other hashing algorithm) directly with dd.

If you'd like to validate your copy, I'd suggest the following, and visually compare the hashes.

$ sudo dd if=/dev/sda of=/dev/sdb bs=64K conv=noerror,sync status=progress

$ sudo md5sum /dev/sda
$ sudo md5sum /dev/sdb

for SHA256

$ sudo shasum -a 256 /dev/sda
$ sudo shasum -a 256 /dev/sdb