DEC-RS25-DiskSubsystem

The RC25 Disk Subsystem is a compact, high-performance mass storage solution from Digital, offering 52 Mbytes of formatted storage. Its unique design combines a 26 Mbyte fixed Winchester disk with a 26 Mbyte sealed, removable cartridge on a single spindle.

Key Features and Benefits:

• Fixed/Removable Design: Provides the reliability and performance of fixed-media disks with the convenience and portability of removable cartridges, ideal for personal data storage, data interchange, and fast backup.
• Intelligent Controller: An integral, advanced controller manages disk access, data transfers, and performance optimization. It supports Digital's Mass Storage Control Protocol (MSCP), ensuring compatibility with other Digital Storage Architecture disks.
• Performance: Boasts impressive performance figures, including fast average seek times and high transfer rates, enhanced by features like seek ordering, overlapped seeks, and internal data buffering.
• Reliability & Data Integrity: Ensures high reliability through a mechanically simple single-spindle design, contaminant-resistant media, and robust data integrity features like enhanced error correction codes (ECC), automatic sector reallocation, embedded servos, and comprehensive onboard diagnostics.
• Easy Backup: The one-to-one capacity ratio between fixed and removable disks makes the RC25 a very fast, efficient, and economical backup solution, eliminating the need for separate tape or floppy systems.
• Flexibility & Maintainability: Offered in tabletop and rack-mount configurations, it's easy to install, use, and maintain due to modular construction and self-testing capabilities.

The RC25 is presented as an attractive and versatile mass storage alternative for low-end to midrange UNIBUS and Q-BUS systems.