Tape Storage Might Be Computing’s Climate Savior

This article is a part of our unique IEEE Journal Watch sequence in partnership with IEEE Xplore.

Data storage has lengthy contributed a good portion of the computing business’s carbon footprint, even representing as a lot as 1.8 % of the United States’ complete electrical energy consumption in 2014, in line with a report by the
Berkeley National Laboratory [pdf]. Brad Johns, a veteran of IBM’s information storage enterprise and an information storage advisor in Arizona, believes that the answer to information storage sustainability, for the foreseeable future at the very least, lies in a chunk of know-how many may take into account already outdated: the magnetic information tape.

“There’s an opportunity that many organizations have to reduce their carbon footprint and do it in a way that could reduce their costs… that’s kind of a win-win,” says Johns.

At least 60 % of all information is “cold,” but stays on HDDs. Which presents a chance to transition to a greener—and cheaper—various.

The want for information storage is barely rising, too. International Data Corporation (IDC) estimated that the full quantity of knowledge created would improve from 33 zettabytes in 2018 to 175 ZB in 2025, and that round 10 %, or 17 ZB, of that information could be saved in 2025. According to estimates by IDC and Seagate cited in 2021, 62 % of knowledge is saved on HDDs, 9 % on strong state drives (SSDs), and 15 % on tape in 2021.

HDDs are extra handy for storage as a result of data could be retrieved from them a lot sooner than it may be retrieved from tape storage. The tradeoff is larger carbon emissions,
Johns explains in an article for Motion Image Journal—HDDs have a lifespan of roughly 5 years, throughout which period they produce round 2.55 equal kilograms of carbon dioxide per terabyte per yr (based mostly on an estimate from Seagate for the Exos X18 HDD). In distinction, tape media has a lifespan of greater than 30 years, throughout which period they produce simply 0.07 kg CO2e/TB/yr (based mostly on an estimate from Fujifilm for the LTO 9 [pdf]), or 3 % that of HDDs.

Tape Storage Saves Carbon

The bars on this graph point out the local weather financial savings accrued in switching out “cold” information (i.e. information not often accessed however nonetheless indisposable) from onerous drives to magnetic tape. Source: Brad Johns Consulting

Johns factors out that a lot of the huge inflow of knowledge being created and saved right now is “cold data,” information that’s not often accessed however nonetheless has worth and can’t be discarded. According to a
2019 whitepaper by IDC [pdf], 60 % of all information is chilly, but stays on HDDs. Johns argues that this presents an vital alternative for giant information companies to transition to another, tape storage, a extra sustainable type of information storage which would cut back their carbon footprint.

If organizations worldwide collectively transitioned all their chilly information, a collective 60 % of all information, to tape, the quantity of carbon dioxide emitted by information storage throughout the globe would fall by 58 %, a 79 million ton discount in CO₂ emissions, Johns calculates.

Reducing e-Waste

Tape Storage Saves e-Waste

Meanwhile, this graph signifies how a lot e-waste can also be saved by switching a portion of the world’s “cold” saved information from onerous drives to magnetic tape. Source: Brad Johns Consulting

Transitioning chilly information to be saved on fashionable tape media additionally reduces
digital waste (e-Waste). Since HDDs solely have a 5 yr lifespan, the previous HDDs will have to be discarded for brand spanking new ones to retain the identical information. Tape storage is usually changed each ten years, leading to much less discarded storage. As an instance, if an information middle must retailer 100 Petabytes of knowledge for 10 years, storing all information on HDDs leads to 7.4 metric tons of e-Waste. If 60 % of the info is moved to tape, solely 3.6 metric tons of e-Waste are generated, leading to a 51 % discount.

“Tape today clearly has a compelling advantage over hard disk drives. And if you look at the roadmaps, it’s going to stay that way probably for the next decade.”
—Brad Johns, Brad Johns Consulting

Further incentive for this resolution is the monetary profit, argues Johns. Using Fujifilm’s complete price of possession (TCO) device, he calculated that storing all 100 PB of knowledge on HDD prices US $17,707,468, whereas a mixture that features 60 % tape cuts the price practically in half to $9,476,339.

Many massive companies have already began shifting towards tape storage. For smaller firms, nevertheless, the method of shifting to tape has been slower. The definition of chilly information is variable, and is determined by particular person organizations’ wants and person necessities. Thus, categorizing information as “cold” in order that it may be moved to tape is tricky–and prices time, cash, and energy. While giant companies might have these sources, smaller firms don’t. This is likely one of the obstacles stopping tape storage from being broadly applied in smaller scale information facilities.

The different impediment Johns describes is the administration problem. “The technology is pretty proven. It’s just trying to get the momentum amongst all the other things that IT organizations have to do,” he says.

Regardless of whether or not companies implement the answer, the query stays whether or not tape storage is the answer that’s right here to remain. “Tape today clearly has a compelling advantage over hard disk drives, and if you look at the roadmaps, it’s going to stay that way probably for the next decade,” says Johns. But there’s lively analysis into alternate options.
Microsoft, for instance, has invested in analysis for DNA-based storage choices, he factors out. But, “there’s still a lot of research to be done and engineering to actually turn it into something,” he says.