IEEE Computer January 1976 New Disk System for Minis Delivers More Storage Microcomputer Systems' new MSM-10X high-density disk storage system features 225 million bytes of storage and a 1.2 megabyte/second transfer rate. The system is aimed at the $15,000 to $25,000 market now covered only by 15 to 20 MByte disk systems, the firm states. The MSM-10X supports up to four disk drives in its standard configuration and can be expanded to handle up to 15 drives for a total capacity per controller of 15 to 4500 MBytes. The system's microprogrammed controller is totally integrated with the host computer's operating system. This 12" x 15" PCB controller offers automatic self-test of both controller and disk, high reliability due to low parts count (only 160 IC's), plus a built-in maintenance panel and controller resident diagnostic. The controller interfaces with a number of disk disk drives such as those of Ampex, CDC, Calcomp, and Caelus, and is plug compatible with minis such as Hewlett-Packard, Digital Equipment Corp., Data General, Microdata, and Interdata. Additional standard and optional features of the MSM-10X include programmable data transfer rate, soft sectoring, defective track flagging and sensing, overlap seek, multiple sector transfer, and error detection and correction.