If your PC is truly broken, SystemRescue is often the first and last tool you need. It’s designed from the ground up for recovery work: filesystem repair, partitioning, disk imaging, bootloader fixes, ...

The CDROM image was a firmware upgrade image from Dell (based on Linux). Mounting the image with iDRAC, it worked nicely. As one of the Servers had a dying iDRAC (Dell R320), I needed an USB stick.