Understanding The Specifications Of Tier III Data Center To Ensure Redundancy & Maintainability

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One of the most critical parts of every business is to ensure hundred percent available for its data center. This is what is required by Tier III data center specifications – build a data center that ensures a certain level of availability or uptime.

In general, there are four Tiers in data center. Let’s understand them separately, then will discuss tier 3 datacenter in details.

According to experts, the four tiers include the following:

Tier I:

Tier 1 combines a single path for cooling and power distribution. It provides 99.671% availability without redundant components.

Tier II:

It is composed of a single path to distribute power and keep the area cool, but with redundant components. The tier II ensures to provide 99.741% availability.

Tier III:

It is designed to have multiple active paths for distributing power and cooling. However, only one path remains active and it has redundant components. It is concurrently maintainable. It provides 99.982% availability

Tier IV:

Tier IV contains several active power and cooling distribution paths. It has redundant components. Its exclusive specification is that it is ‘zero faults tolerant’ and provides your 99.995% availability.

data center tiers

Source – Visually

After understanding all the tiers of data center, it’s time to consider tier 3 data center, as it is our concern in this article.

Tier III Data Center – Get In-Depth Information

Considering 3 tier data center, it is built in a way that can meet these two requirements:

  1. Redundancy – minimum n+1 redundancy
  2. Concurrent Maintainability for all power and cooling components and distribution systems

If you have a lack of a component in your data center due to failure or maintenance, it shouldn’t affect the functioning of a business infrastructure. These specific requirements are met from the power, cooling and building infrastructure fronts till the server rack level. The specifications of Tier 3 data center don’t specify requirements at the IT architecture levels.

Below are the requirements to meet the requirements Tier III data center infrastructure.

Proper Power supply

Maintain unreliable source of power. For this, you need to arrange a diesel generator and an automatic transfer (ATS) as a backup for the utility power supply. The ATS is designed to automatically switch over to the backup generator if the utility power supply goes down. Since most of the data enter has only one ATS, the 3 data center specifications require minimum two ATSs to ensure redundancy and concurrent maintainability.

Power Backup Options

Going ahead with the requirements, you need to have a diesel generator with having at least 12 hours of fuel supply in reserved. Besides, having two tanks is a must to achieve redundancy. Each tank should have 12 hours of fuel. By this way, you can be able to establish he concurrent maintainability.

Distribution of Power to IT Loads

The power distribution panel is another requirement of the data center tier 3. It distributes power to the IT load like networks and servers with the help of Uninterruptible Power Supply (UPS). It also provides power to non-IT loads such as air conditioning and other infrastructure systems. It is good to use separate power distribution panels for each ATS. It enables you to achieve redundancy and concurrent availability.

The separate panels are required because connecting two ATSs to a single panel may lead to bring down both ATS units during panel maintenance or replacement. The specifications of tier III data center call for two or more power lines between each ATS and power distribution panel.

In the same way, you should also have two or more lines for each power distribution panel and UPS to meet the same requirement.

Uninterruptible Power Supply (UPS)

To be very frank, the distribution panel supplies power which is further used by the UPS and supplied to the power distribution boxes for network infrastructure and server ranks.

Here is an example,

Assume that your data center requires a 20 KVA UPS. You will need to deploy two 20 KVA UPS or four 7 KVA UPS units in order to achieve redundancy.

You should maintain here that each UPS is connected to a just single distribution box as required by the Tier 3 data center. In that case, only a single power distribution will go down if a UPS fails to work or it needs maintenance.

Server Racks with Two Power Distribution Boxes

Each server rack should have two power distribution boxes. And the servers, in each rack, should be equipped with dual power supply features. It helps connect the power distribution boxes. There can be a static switch for devices that don’t have dual powder mode features.

Wrapping Up

To wind up, Tier 3 data is known for regular uptime due to the holistic features it has. Every business that needs this data should meet the specifications mentioned above. However, it is ideal to look for a professional IT company that can offer you tier 3 data center as maintaining in-house data center is not easy. It will require most of your time and money and you cannot focus on your business goal.

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