Which device maintains a replica of all required software for restoration of any system processor?

• A. Local backup server (LBS)
• B. Redundant Array of Independent Disks (RAID)
• C. Mainframe restore archive (MRA)
• D. Toolhost site support subsystem (SSS) external hard drive

Answer: (D)

The concept here is having a portable, authoritative set of restoration software that can be used to recover any system processor. The Toolhost site support subsystem external hard drive is designed to hold that complete, up-to-date collection of needed software, tools, and images in one place. Because it’s an external drive, it can be taken to different systems and hooked up to boot or reinstall, ensuring a consistent, known-good software baseline for restoration across diverse processors.

Local backup servers store backup data for specific hosts or networks, but they’re not guaranteed to present a universal, ready-to-use restoration toolkit for every processor type. RAID is about redundancy and speed within a storage array, not about maintaining a complete, portable restoration software replica. A mainframe restore archive is specialized to mainframes, not to every system processor in a diverse environment. The external hard drive used by the Toolhost site support subsystem is the appropriate vehicle for maintaining that single, portable replica of all required restoration software.