Import Disk (EXT2) fails with Rsync exit code 23

[bigsean]

Trying to copy my Media from an old HDD to a dataset and get the following error

Code:

Error: Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/middlewared/job.py", line 361, in run
    await self.future
  File "/usr/local/lib/python3.8/site-packages/middlewared/job.py", line 397, in __run_body
    rv = await self.method(*([self] + args))
  File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
    return await f(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/pool_/import_disk.py", line 94, in import_disk
    raise Exception('rsync failed with exit code %r' % rsync_proc.returncode)
Exception: rsync failed with exit code 23