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How to Replace Legacy SystemsTechnology, be it in any form or shape, becomes outdated with the passage of time. Every enterprise requires the changing of aging systems before the process becomes a challenge. Replacing legacy systems can be tough, but maintaining them longer can make operations difficult, expensive, and a burden for both the company and its employees.
However, once migrated, you will notice a huge increment in productivity and an increase in the advantages of functionality and cost. However, this is only possible with the right strategy and procedure for legacy replacement. Keeping in mind the level of how aged your hardware is and what kind of migration you can afford, choosing the right method depends entirely on you. As a decision-maker for your company, ensuring the smoothness and ease of the process is essential for all your staff.
ArticlesDecision-makers often consider replacing legacy systems with modern alternatives. But there is one common mistake they repeatedly make. It’s not the time they spend on the project. No, it’s not the budget either.
What they really lack is the right tactic. Choosing the right solution comes from knowing the nitty-gritty of the entire legacy modernization process. There are numerous ways of replacing legacy systems.
But, limiting yourself to a popular solution is not a smart move.
The simplest way to handle this is to find a solution that is cost-effective, fast, fits the specific architecture and doesn’t disrupt your operations.
In this article, you will get to know everything related to replacing legacy systems. Most importantly, you will uncover how to replace legacy systems the right way.
Why is replacing legacy systems important to you? IT leaders must understand that it’s not necessarily the operating systems. In fact, the operating system is executing essential applications that are vital to the business. Changing them puts your business continuity at stake.
Typically, the issue stems from the hardware. It causes serious risks and leaves your system vulnerable to breakdowns. The expenses add to the total cost of operating any large data center, amounting to around $10-25 million annually. These problems include:
Recent data shows that unplanned downtime results in a staggering 11% loss of yearly turnover for Fortune Global 500 companies, amounting to nearly $1.5 trillion. And legacy hardware is the major contributor to this.
Older hardware usually consumes a lot of power. This results in higher electricity costs and increased cooling requirements. Additionally, there is a shortage of spare parts. Finding replacement parts for end-of-life hardware is nothing short of a challenging endeavor. Even if you found one, the price is excessive.
Finally, legacy hardware often requires more physical space compared to modern, compact alternatives. This can lead to inefficient use of valuable floor space in data centers or office environments, leading to higher maintenance costs.
Engineers who are well-versed with the legacy servers are retiring in large numbers. Young engineers are not likely to spend their time mastering outdated technology. This leads to a shortage of skilled professionals. The absence of expert maintenance can result in significant system failures.
Has your system been running slower? It’s common for hardware to degrade over time. This can affect not just the system’s performance, but also how efficiently your team gets work done. When employees are stuck waiting for slow systems to respond, valuable hours are wasted, and overall productivity takes a hit.
On average, 60-80% of the IT budgets are allocated to legacy system maintenance. Allocating such a large portion of the budget to legacy systems maintenance severely affects an organization’s ability to invest in new technologies and innovative projects.
Replacing legacy systems with modern solutions offers numerous advantages.
Modern systems are designed to be stable and reliable. For example, migrating your Solaris applications from SPARC to modern x86-based infrastructure means there is an increase in reliability. With this reliability, businesses can avoid costly interruptions and downtime
Obsolete systems are also more vulnerable to cyber threats such as hacking, data breaches, and malware. Newer systems protect sensitive data and reduce expenses by preventing costly security incidents. When you replace legacy systems, security measures to protect them are easier due to the automated maneuvers of current tools.
The average data breach cost has decreased (Cost of a Data Breach Report 2025) from 4.88 million to 4.44 million in a year, and much of it is due to legacy modernization. This trend will continue if people come forward with their aging technology more.
Older systems are expensive to keep in line. They need constant maintenance, consume more energy and are usually highly dependent on trained personnel to remain operational. In turn, modern systems use less energy, require less cooling, and are easier to maintain, decreasing overall costs.
Spending money on legacy systems keeps you from investing in areas that could boost productivity. Modern systems allow for better resource allocation, so you can focus on improving efficiency and increasing revenue.
Newer hardware operates at greater speeds and is more responsive to commands. This results in reduced downtime and speeds up the rest of the processing workflow. Thus, employees have more time to work on what they need to do, instead of waiting for the system to catch up.
New systems make it easier to establish connectivity and other setups via cloud solutions. Businesses looking to update their IT infrastructure need a solution that offers scalability, adaptability, and cost-efficiency, and the cloud offers exactly that.
Legacy migration can be a challenge with the wrong method. Find out how to do it here.
Two key aspects stand out when it comes to replacing legacy systems: selecting the appropriate strategy and getting your business ready for the implementation.
For IT leaders and decision makers, feeling overwhelmed by numerous legacy system modernization approaches is a common occurrence. What they truly need to focus on is analyzing the risk, cost, time, and determining if the strategy being used is affecting the continuity of their business.
When discussing the strategies to replace legacy systems multiple experts refer to the 5 R’s: rehosting (lift-and-shift), refactoring, rearchitecting, rebuilding, and replacing legacy systems.
Refactoring, rearchitecting, rebuilding, and replacing options demand extensive retraining of both administrators and end users.
They often generate significant challenges in change management for organizations—especially when individuals are already packed with their daily tasks.
In contrast, lift-and-shift emerges as a cost-effective, less risky, and time-efficient alternative that can help you with all the benefits of replacing legacy systems in a short time. This approach requires no modifications or changes whatsoever. The end user will remain completely unaware of the changes made to the aging architecture. This ensures that the current process remains uninterrupted, with no need for retraining – everything will operate as usual on a more efficient and reliable infrastructure than ever before.
After you finalize the legacy system replacement strategy, there are some essential considerations you must adhere to. For example, if you are migrating to the cloud, you must undergo the 5 phases of action we recommend. Similarly, if it’s an on-premises migration, the considerations will differ.
But in general, these are the things that you should keep in mind before replacing legacy systems:
A successful legacy system replacement strategy depends on establishing a clear goal, both for the short and long term, and selecting the right modernization approach.
Trend Windows & Doors had a VAX 7840 VMS server for all its critical options. As a company homing legacy hardware for 50 years, it could rewrite its operating systems, but that would cost a lot. A more economical option would be to get a second VAX, but performance issues and space problems prevented that.
The result was better than expected. Not only did the aging system get more time, but backups took way less time than before. Trend saved costs and could even ensure a performance boost in the future. It all happened because of Charon-VAX and Stromasys.
If you’re thinking about replacing legacy hardware, Stromasys might be an ideal choice. Charon by Stromasys emulates SPARC, VAX, AlphaServer, and PA-RISC servers on modern x86-based architecture or in the cloud.
Charon operates on the fundamental principles of Lift–and-Shift migration. This indicates that the applications do not require any changes. The original hardware will be replaced in just a few days. There is no need to write or modify any code. Essential applications will operate seamlessly on a new and reliable platform.
If you manage the IT systems of an enterprise that depends on legacy hardware, this is an excellent opportunity to breathe new life into your mission-critical applications with minimal alterations, cost, and time. Experience the benefits of replacing legacy systems with hardly any expenditure with Stromasys.
Legacy systems are outdated software, hardware, or technology that continue to be utilized in several companies, even though they have been surpassed by more advanced solutions.
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