here's a check on the *source* drive of the recent failed dd:

[sudo] password for dep: fsck from util-linux 2.41 e2fsck 1.47.2 (1-Jan-2025) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/sdb6: 11/59154432 files (0.0% non-contiguous), 3995367/236615936 blocks