ALERT

[FREE DEMO] Deploy Your Enterprise Cloud in Minutes

R/390

Definition - What does R/390 mean?

R/390 is an expansion card used in an IBM RS/6000 mainframe server. All the server's configurations, as well as its complete systems, are called R/390. The R/390 system is an IBM mainframe system designed to run on a personal computer.

The R/390 servers were marketed as development environments that provided an economical approach for companies moving their legacy applications from old mainframe systems to a new operating environment.

Techopedia explains R/390

Up until the mid-1990s, mainframe computers were huge machines that filled entire rooms and required special air conditioning and power arrangements. Today, mainframe computers are much smaller and far sturdier than their predecessors.

The original R/390 had a 67 MHz POWER2 processor with 32 MB of RAM, or a 77 MHz processor with 512 MB of RAM. Several early PCI RS/6000s could have the PCI P/390 card installed. However, the MCA P/390 expansion card will work in any MCA RS/6000 system. All configurations are referred to as R/390, and the machines as R/390 servers, which require AIX version 2 for the operating system.

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.