Data center tiers – The levels and standards explained

The ability of a data center to preserve its functionality during different types of failures like power outages refers to data center tier.

When the tier levels are higher, it shows its ability to sustain data for center operations and fault-tolerant systems that will permit nonstop utilization during particular type of predicaments or emergencies.

What can you expect from data center tier 1 or 2 and how does it differ from data center tiers 3 and 4.

With Hidora data center tiers, businesses are assured of recovering their data should in case there are any unplanned interruptions.

It does not matter if the business chooses the Tier 1, 2, 3 or 4 data center because Hidora guarantees secured connection with data backup and storage.

With an affordable payment plan, businesses can comfortably choose their desired tier data center with Hidora.

We have the best servers located at safehost to safeguard all your company data.

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We also handle all company maintenance and with our servers, when the entire process is complete, all your company data can be recovered.

Companies using Tiers 3 and 4 can still carry on with their work during the maintenance process.

Hidora data center standards generate some sort of stability depending on the level of service based on the tier type and necessities it can maintain.

For a period of time, 4 different tier levels have been in existence though tier 5 is coming up with new, innovative and more durable needs which will be explained in this article.

Hidora equally cares about the environment, the reason why we make use of green energy.

The renewable energy sources reduce the effects of global warming on our environment since the energy sources are all natural.

Reliability is another benefit of green energy; companies we work with can be sure of having constant energy supplies and in surplus since we do not rely more on foreign energy supplies.

We will be looking at the various data standards so you have a clear comprehension of the different data center tiers and what your company stands to benefit from using each data center tier.

The different types of data center tiers

Tier 1

Tier 1 data centers which is the first type we have; are in the last tier as a result of the level of severance and interruption they have.

The system usually shuts down during power outages and emergencies and it has just a single path for its power and cooling equipment.

The structure equally also has to be totally turned off to carry out the yearly examination and renovate work of the building, triggering possibly extensive stoppage.

Its uptime is estimated to always be about 99.671% annually which is equivalent to 28.8 hours of stoppage.

A lot of small businesses always love Tier 1 data centers since it is the most affordable that can host their servers.

Though the shortage of backups and redundancy can actually put the business at risk and the Tier 1 data centers needs to be avoided if the company depends greatly on data.

Tier 2 Data Center

The Tier 2 data center has a slightly different uptime of 99.741%.

It contains more structure and measure to enable less weakness to unforeseen shortage as compared to Tier 1 data center.

Added to that, Tier 2 data centers need to have redundant (N+1) capacity parts like; the uninterruptible power supply (UPS), cooling systems and auxiliary generators.

Generally, it has a single path for power and cooling with some redundant and standby parts.

As an example, there could be a generator to serve as a standby power and cooling system to maintain the data center environment at its best.

Users can expect a 22 hours annual downtime and any part that fails to work properly can be fixed manually by changing to a redundant item with a small interruption period.

Programmed repairs still need downtime but it still provides a level of dependence that Tier 1 does not have.

Tier 3

Tier data center 3 has been designed to meet up with the shortcomings of data Tiers 1 and 2 and is what medium and bigger companies always tend to find preferable.

Most of its equipment is dual-powered and contains several uplinks.

With many paths for power, cooling and systems intact, servers can stay functional during deliberate maintenance and outages thus if one fails, there are other that the system can use to work.

Some data centers even provide effusively problem-resistant equipment.

They are typically referred to as Tier 3+ data centers in the flea market.

It has an estimated uptime of 99.982% that is 1.6 hours of downtime yearly.

The cost is considerably inexpensive than Tier 4 data centers.

Therefore, most businesses that need regular online attendance or full-time online operations usually go for Tier 3 / Tier 3+ data centers.

All IT equipment also has several power bases in these data centers, and there are particular techniques in place to permit conservation and repairs to be carried out without necessarily turning off the system.

There is often some type of power outage security in place just like in Tier 3 facilities.

Tier 4

When it comes to data Tier centers, Tier 4 stands out as the maximum level of data center tiers and equally the most expensive.

The Tier 4 data center can meet up to the needs of Tiers 1, 2 & 3 and equally ensure that all equipment is completely fault-resistant.

It is totally redundant with several cooling systems, sources of power and generators to be on standby.

Interruption should not take place when there is prearranged maintenance and inadvertent outages.

Tiers 4 has an estimated uptime of 99.995% which is projected to be 26.3 minutes of downtime annually, which is just 0.013% greater than a Tier 3 data center.

They equally provide a 96 hour power outage protection.

With a trifling development in convenience, but meaningfully more expensive in price than Tier 3 data center, and several businesses will prefer Tier 3 data center over Tier 4 data center.

The redundancies built into Tier 4 data centers are designed to ensure that the system can work with no problems even if one or more pieces of equipment develop a fault.

All is redundant, as well as; generators, cooling units, and power sources, just to name a few, so that an alternative system can instantly take over in case another fails.


To determine which data center to go for, there is a need to ponder over both availability and your IT needs.

Tier 1 and Tier 2 data centers are not typically right for mission life-threatening workloads, except you have no other alternative and have emergency plan to deal with how the business works during interruptions.

It is recommended that companies house all their critical workloads in Tier 3 and Tier 4 data centers only.

It is preferable to pay for what can have all your data well protected so as to avoid any stoppages.

It is also important that all companies have their data Tiers maintained so as to avoid any unforeseen circumstances.

Companies equally need to work with the best web hosting and data servers.

Written by

jean luc dubouchet hidora

Jean-Luc is a Junior Full-Stack Tech Engineer at Hidora with a strong IT background. He is consulting clients about DevOps and also helping Hidora’s customers to make automation deployments and migrate their environments.