MultiBoot USB
This is a project that contains a collection of GRUB files and scripts that will allow you to create a pendrive capable of booting different ISO files.
SpinRite is a computer program for scanning magnetic data storage devices such as hard disks, recovering data from them and refreshing their surfaces. The first version was released in 1987 by Steve Gibson. Version 6.0, still current as of June 2017, was released in 2004. SpinRite is run from a bootable medium (such as a CD, DVD or USB memory stick) on a PC-compatible computer, allowing it to scan a computer’s hard drive and file system.