LBA tools(hd_write_verify & hd_write_verify_dump) are very useful for testing Storage stability and verifying DATA consistency, there are much better than FIO & vdbench's verifying functions.

qcow2-dump is a useful tool for checking and repairing damaged qcow2 image, it has some improvements compare with qemu-img check command (qcow2-dump has all functions which qemu-img check command has)