ddrescue -- power drive off and on after every slow read

ddrescue_restart_slow.sh

#!/bin/bash

DRIVE=sda
IMAGE=
MAPFILE=

until ddrescue /dev/$DRIVE $IMAGE $MAPFILE -n -a 10M --max-slow-reads=0
do
  sleep 5
  echo "turning off $DRIVE"
  echo 1 >/sys/block/$DRIVE/device/delete
  sleep 5
  echo "turning on $DRIVE"
  echo "- - -" >/sys/class/scsi_host/host0/scan
  sleep 5
done

Not tested yet