Are spinning disks dead?

spinning disks
Are spinning disks dead?

InfoWeek writer Paul Venezia wrote in his Jan. 14 column that storage would soon evolve into “… a world devoid of the painfully outdated yet ubiquitous spinning disk.”

Yep, and the familiar phrase “Tape is dead” has been bandied around for 25 years. However, folks like StorageTek, Quantum, FOR-A, IBM and others make a living by selling hundreds of millions of dollars of that so-called “dead” technology every year. Content providers, including Major League Baseball, ESPN and virtually everyone with a library larger than a few thousand hours, still rely on tape for long-term storage.

I believe Venezia is too quick to write off spinning disks as effective storage mediums. He suggests it would be far better to even forgo the entire concept of “local storage.” Um, I’d like to say something about that. “No friggin’ way.”

I’ve written plenty about the perils of local storage, disk crashes and data loss. But, that pales in comparison to pitching all of your content into the cloud and then realizing that you no longer have any control over where, when or how it’s used. Before you store your precious new 13-part series on Amazon’s EC2 or Microsoft’s SkyDrive, better read the SLA. See who has access to that content and who can peek in your backroom.

Then, you might also want to read up on the litany of cloud failures. Do an Internet search of the term, and you’ll develop cold shivers over the access to your cloud-based content.

Venezia’s visioned future isn’t “a bunch of hot-swap disks eating up rack units and expelling a lot of heat.” Instead, he believes users will rely on a “1U device that provides sufficient storage capacity, along with high performance and high reliability, and functions as a set-and-forget appliance.” Hold on, wait a minute. Exactly what’s behind that 1RU device that actually holds that content? Maybe a water bucket? He never fully explains. Watch my other hand.

One shouldn’t be too directionally optimistic when it comes to technology. Solutions have a funny way of changing course when science offers better options. Who knows how we’ll store bits 25 years from now? Certainly not some tech writer — including me.

That said, how do you think video will be stored by the time you retire?


Brad Dick, editorial director

Discuss this Article 1

Brad Dick
on Mar 5, 2013

From reader Alex Neihaus
Hi, Brad.

"Are spinning disks dead" was another thought-provoking column in the February issue of Broadcast Engineering.

While I agree with you mechanical disks are far from dead — not least because of the still-orders-of-magnitude cost difference between them and SSDs, there are some additional points you might wish to consider.

First, there are now online "cold storage" systems like Amazon Glacier (see my personal blog post about Glacier here: http://www.yobyot.com/tech/stone-cold-file-backup-amazon-glacier-cloudbe...) that permit broadcasters to implement tiered storage: local spinning disks, near-online storage in the cloud and archive storage in the cloud. This hews closely to the classic three-tier storage regimens financial institutions and medical organizations implement to manage their data and regulatory requirements.

As to cloud storage, you are absolutely correct that some services, like SkyDrive, Dropbox and Google Drive, have the keys to decrypt content. And their EULAs permit them to do so to display the data to you and under court order. In fact, any "backup" service that allows one to view the document online — even if you input a very strong password — has the decryption keys or they wouldn't be able to display the information.

The only purely safe way to store content is to encrypt it before it is transmitted to a cloud provider and do not give them the key.

This is where you got it a (little) wrong about Amazon. First, long-term storage on Amazon Web Services isn't provided by EC2. EC2 is AWS's computing service. Long-term storage for EC2 computing instances (analogous to "servers in the sky") is provided by something AWS calls EBS, or Elastic Block Storage or S3, Simple Storage Service. EBS is intended to mimic the spinning disks that Windows, Mac OS X and/or Linux use on a desktop or server computer. These can, therefore, be encrypted by the OS.

Further, S3 and Glacier do not have to be associated with an EC2 server. You can use them simply for storage. And, in a good news story for broadcasters, what you store in these systems can be whatever you like. That means it's easy to very thoroughly encrypt valuable content and transmit it for storage in S3 and/or Glacier, depending on the purpose, secure in the knowledge that nobody could (practically) decrypt that content including Amazon. What's stored looks like random noise. Period. Only you have the keys. Without them, even a court order cannot produce the decrypted content. (Though whether or not you have to produce a key isn't settled in law.)

Finally, cloud services do fail. But one of the truisms of backup is that it isn't safe until it's been backed up three times in different places. That's where the tiered cloud storage providers — at least the ones who permit total control over the content — have their place. It would be prohibitively expensive for broadcasters to come anywhere close to the reliability of cloud service providers — and by simply using more than one provider, they can achieve levels of availability never before within their reach.

I hope you will revisit this topic as I believe it's enormously important to broadcasters and the technological and cost savings opportunities for managing long-term storage of content have never been better.

Best,
Alex

Alex Neihaus
VP of Marketing
ZiXi LLC

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