The following is the text of an IBM Data Processing Division press release headlined “IBM Announces Disk Storage For System/7” and distributed on July 14, 1971.
A major expansion of the data storage capacity of the IBM System/7 as well as a custom-designed console were announced today by International Business Machines Corporation.
System/7, introduced last fall, is a rugged and highly reliable computer that can measure, test, analyze and control industrial and laboratory events as they are happening. The sensor-based system, which rents for as little as $352 a month, is IBM’s lowest-cost computer.
A new disk module, which can store a user’s programs and data, significantly enhances the storage capacity and flexibility of System/7, extending the range of applications it can perform. For example, a user of a stand-alone System/7 can compare test results against information stored on the disk. When System/7 operates with a “host” computer, such as an IBM System/370 or System/360, the disk can be used to store large volumes of data for transmission to the larger computer.
The disk storage module is housed within the System/7 and contains either one fixed disk, or a fixed disk and a removable disk cartridge on a single drive. Storage capacity is either 1.23 million or 2.46 million 16-bit words. Average access time is either 126 or 269 milliseconds. Data transfer rate is 99,500 words a second.
The custom console, available on special order, permits users to display the status of a process, convey instructions to the computer or make inquiries. It consists of a control unit and several input/output devices, which may include a user-provided television monitor (black and white or color) and any of the following:
- A special function keyboard with 24 oversize keys, to simplify priority communication with System/7. These keys can be labeled to identify functions such as “Initiate Experiment,” “Log and Display Status,” “Emergency Shutdown” and “Calibrate.”
- A typewriter keyboard for data entry. Data can be automatically displayed on the video monitor for verification.
- A serial printer, which can be used to obtain permanent copies of displayed messages.
IBM also announced that the newest element of its 2790 data communication system, the 2798 guidance display, can now be used in 2790 configurations attached to System/7. The display unit provides interactive communication between operators at work stations in a manufacturing plant or maintenance shop and the computer.
In addition, IBM announced that several System/7s may now share the same 5028 operator station, thereby reducing the cost of multisystem installations. Previously, a 5028 was required with each System/7.
Prices and Delivery
Monthly rental prices for the IBM 5022 disk storage module range from $300 to $455, depending on speed and capacity. Purchase prices range from $13,245 to $16,225. First customer shipments of System/7 with disk storage module will be scheduled for May 1972.
First customer shipments of System/7 itself begin this September, two months ahead of the schedule previously announced.