I've booted up arch live cd, with the idea of creating a disk image. There are 2 hdds (/dev/sda - i want this image, and /dev/sdb - the image will be copied here, but as a backup file (not rewrite), so i can use it later)
So I mounted the /dev/sdb1 as:
mount -t auto /dev/sdb1 /mnt/hdd
And then i tried
ddrescue if=/dev/sda of=/mnt/hdd/backup.dd
But it failed saying cant open input file, no such file or directory.
What am I doint wrong?