okay, wish me luck.
going to run ddrescue as per your link.
Added brand new disk to server
Running.
root@Kraken:~# ddrescue -f /dev/sdd /dev/sdac /boot/ddrescue.log
GNU ddrescue 1.23
Press Ctrl-C to interrupt
Initial status (read from mapfile)
rescued: 39845 kB, tried: 0 B, bad-sector: 0 B, bad areas: 0
Current status
ipos: 66650 kB, non-trimmed: 0 B, current rate: 786 kB/s
opos: 66650 kB, non-scraped: 0 B, average rate: 515 kB/s
non-tried: 16000 GB, bad-sector: 0 B, error rate: 0 B/s
rescued: 66650 kB, bad areas: 0, run time: 52s
pct rescued: 0.00%, read errors: 0, remaining time: 380d 12h
time since last successful read: 0s
Copying non-tried blocks... Pass 1 (forwards)