Script to copy data from broken hard drive with DD :)

copy-data.sh

#!/bin/bash

dst_drive=/dev/sda
src_drive=sdd
skip_drive=sdb
dd_status=/tmp/dd
log_file=/tmp/dd.log
size_file=/tmp/last_size
slot=32:1

reactivate_drive() {
	while true; do
		# Firmware state: Online, Spun Up
		if MegaCli -pdInfo -PhysDrv[$slot] -a0|grep -q 'Online'; then
			break
		fi
		# Foreign State: Foreign 
		if MegaCli -pdInfo -PhysDrv[$slot] -a0|grep -q ': Foreign'; then
			MegaCli -CfgForeign -Clear -a0 >> $log_file 2>&1
			sleep 1
		fi
		# Firmware state: Unconfigured(good), Spun Up
		if MegaCli -pdInfo -PhysDrv[$slot] -a0|grep -q 'Unconfigured(good)'; then
			MegaCli -CfgLdAdd -r0[$slot] WT NORA Direct -a0 >> $log_file 2>&1
			break
		fi
		sleep 2
	done
}

start_copy() {
	skip_size=0
	skip_file_size=0
	if [[ -f $size_file ]]; then
		skip_size=$(<$size_file)
		skip_file_size=$skip_size
	fi
	# Get the last drive name :)
	src_drive=$(awk '/sd.$/{a=$4}END{print a}' /proc/partitions)
	if [[ $src_drive =~ sd[ab] ]]; then
		echo "Wrong drive: $src_drive"
		return 1
	fi
	if [[ -f $dd_status ]]; then
		# dd: error reading '/dev/sdd': Input/output error
		# 2926+1 records in
		# 2926+1 records out
		# 30687887360 bytes (31 GB, 29 GiB) copied, 242 s, 127 MB/s
		# MB/10 because of the bs=10M. So we get the value of the MB copied and then devide it by 10
		skip_size=$(awk '/copied/{a=$1}END{a=int(a);a=a/104858;a=int(a);if(a>400){a-=200}else{if(a>200){a-=100}};print a}' $dd_status)
		skip_size=$(($skip_size + $skip_file_size))
		echo $skip_size > $size_file
	fi
	echo "dd if=/dev/$src_drive of=$dst_drive bs=10M skip=$skip_size seek=$skip_size> $dd_status 2>&1" >> $log_file
	dd if=/dev/$src_drive of=$dst_drive bs=10M skip=$skip_size seek=$skip_size > $dd_status 2>&1
	dd_code=$?
	cat $dd_status
	if [[ $dd_code == 0 ]]; then
		echo "DD finished successfully"
		return 0
	else
		return 1
	fi
}

count=0
start=$(date +%s)
elapsed_time=0
while true; do
	let count++
	now=$(date +%s)
	elapsed_time=$(($now - $start))
	size=0
	if [[ -f $size_file ]]; then
		size=$(<$size_file)
	fi
	printf "%s Starting run %4d - %12d GB copied - elapsed time: %d\n" "$(date +'%d.%b %T')" $count $size $elapsed_time
	reactivate_drive
	if start_copy; then
		break
	fi
	sleep 20
done
printf "%s Finished in %4d runs. Total time: %d\n" "$(date +'%d.%b %T')" $count $elapsed_time