Sony Pixel Power calrec Sony

Four Reasons Tape is More Reliable an Disk by Jay Livens

03/03/2014

It is not uncommon to see many different technologies in the data center including disk, tape, SSD and even optical. Each of these solutions provides unique benefits from a performance, reliability and availability perspective. However, the one element that frustrates me is when vendors (typically disk-centric ones) point to tape as a technology that is outdated and unreliable. It is clear that all technologies have their strengths and weaknesses, but reliability is not typically one associated with tape. In this blog post, I will walk through four reasons why tape is more reliable than disk.

1. Bit Error Rate

Bit error rate (BER) is a concept that sounds complex, but in reality isn't. It is simply a measure of the total of number of expected erroneous bits as compared to the total number of bits received. In the most simplistic terms, it quantifies the likelihood of a faulty bit as a percent of total number of bits written. The table below is taken from the LTO website and highlights how the BER of tape compares to that of disk storage.

As you can see tape has at least a 10x improvement in BER versus the most expensive enterprise disks. However, since LTO is normally used for backup and archiving, SATA has historically been the disk alternative of choice and in this case tape's BER is 100x better! In summary, the likelihood of tape writing an incorrect bit is between 10x and 100x better than an equivalent disk drive.

2. Read After Write

There is a risk with any medium that what you want to write does not actually get written. Why would this silent corruption occur? Well, it could be caused by a number of things, but is often related to an unexpected error in the storage hardware. LTO tape incorporates technology to directly address this risk. As described in this primer, LTO drives natively re-read data as soon as it is written to validate accuracy. This is powerful because this error checking occurs with every write without any need for user intervention. Furthermore, any errors experienced are addressed in real time. If you compare this to disk arrays, the situation gets murky; each disk vendor has a unique RAID algorithm which may or may not include verification. Some arrays may go back at a later time to scrub the disk for errors, but the delayed analysis misses the real time verification and correction that LTO provides. Simply put, when you write data to LTO you can be confident that the tape is accurately storing your information.

3. Data Storage is Abstracted from Data Access

A hard drive is a self-contained device that includes data storage (magnetic platters where information is physically stored) and access (drive heads that move to read/write information and motors to spin the platters and move the heads). A disk drive is presented to the world as a simple block device (through SATA, SAS or FC, typically), but this simplicity masks the complexity of the underlying technology and microscopic tolerances required when manufacturing these items. All of the components inside the hard drive must operate in perfect harmony to access stored information and if any of them fails then all the stored data on the medium is inaccessible. A corrupted drive can be fixed, but the process is extremely complex, time consuming and costly and so most users bypass drive recovery and instead rely on RAID technology to solve the problem.

Tape is different because it separates data storage from data access. In the tape world, data is stored on removable tape media such as LTO-6, but the information is only readable when inserted into a tape drive. Hence data access is separated from storage. This separation is noteworthy because it changes the reliability dynamics since a failed tape drive can easily be replaced while the underlying data remains intact. It also brings interesting compatibility benefits because you can upgrade the data access device (tape drives) separately from the underlying data (the tapes). LTO enables this use case by providing 3 generations of LTO format backwards compatibility (e.g. an LTO-5 drive can read data from LTO-5, LTO-4 and LTO-3 media.)

4. Bit Rot

Extended data retention is the norm in today's IT environments. Yet as retention extends, users need to be cognizant of the consistent readability of their storage medium. Bit rot refers to the gradual degradation of magnetic media that can happen over time and can result in data corruption. Noted industry Analyst W. Curtis Preston discusses this concept in a blog post entitled Tape more reliable than disk for long term storage. The long and short is that all magnetic media face the risk of bit rot, but disk faces a higher risk than tape due its smaller magnetic particles and higher operating temperature. Thus customers can be more confident of the long-term viability of data stored on tape versus disk. Additionally, this formula also helps explain why LTO tapes are stated to last 30 years while the average disk subsystem is replaced every five years.

In summary, disk and tape are complementary technologies that provide strong benefits. Disk excels when it comes to random read and write performance which is why most customers use it as a target for near-term backup and recovery operations. However, it is also clear that tape brings substantial benefits as well and is the optimal medium for longer-term data storage and preservation. As a user, I encourage you to think carefully about the technology you are using to ensure that you are using the right technology to solve your business challenges.

Chart source: LTO Website
LINK: http://blogs.ironmountain.com/2014/service-lines/data-backup-and-recov...
See more stories from ironmountain

Most recent headlines

05/01/2027

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be demoed at CES 2026

Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...

04/08/2026

Dalet Announces Commercial Availability of Dalia, Bringing Media-Aware Agentic AI to Enterprise Productions

Dalet, a leading technology and service provider for media-rich organizations, t...

04/07/2026

Detective Conan: Fallen Angel of the Highway Opens in Dolby Cinemas Across Japan, Presented in Dolby Atmos and Dolby ...

April 7 2026, 19:00 (PDT) Detective Conan: Fallen Angel of the Highway Opens in...

01/06/2026

Dolby Sets the New Standard for Premium Entertainment at CES 2026

January 6 2026, 05:30 (PST) Dolby Sets the New Standard for Premium Entertainment at CES 2026 Throughout the week, Dolby brings to life the latest innovatio...

02/05/2026

Dalet Flex LTS Delivers Smarter Search, Faster Editing, and an AI-Ready Foundation for Modern Media

Dalet, a leading technology and service provider for media-rich organizations, t...

01/05/2026

NBCUniversal's Peacock to Be First Streamer to Integrate Dolby's Full Suite of Premium Picture and Sound Innovations

January 5 2026, 18:30 (PST) NBCUniversal's Peacock to Be First Streamer to ...

20/04/2026

Live From NAB 2026: Sonys Hugo Gaggioni Highlights HDR Advances, Software-Defined Workflows

At the 2026 NAB Show, Sony is showcasing a broad slate of innovations across liv...

20/04/2026

Live From NAB 2026: Fujinons Stosh Durbacz on Expanding the 4K Broadcast Lens Lineup With New Portable Zooms, 94x Box Lens

Fujifilm is sharpening its focus on core broadcast production with a new wave of...

20/04/2026

Live From NAB 2026: Rock-It Sports' John Walberg on Powering Logistics, Shipping for the 2026 FIFA Men's World Cup

This upcoming summer in North America is going to be a busy one. The 2026 FIFA M...

20/04/2026

NAB 2026: Glookast outlines product updates including Media Producer UX, connectors and Premiere Pro panel

Glookast (Booth W1661) announced a series of product updates at NAB Show 2026, c...

20/04/2026

NAB 2026: Matrox Video and Amagi collaborate on cloud-based broadcast workflows using ORIGIN framework

Matrox Video and Amagi announced a collaboration to integrate the Matrox ORIGIN ...

20/04/2026

NAB 2026: Riedel SimplyLive supports expanded centralised VAR system for Argentina football league

Riedel Communications (Booth C4908) announced that the Asociaci n del F tbol Arg...

20/04/2026

NAB 2026: Ikegami introduces VFE-P07D OLED viewfinder with integrated LCD monitor

Ikegami (Booth C3819) announced the VFE-P07D monocular OLED viewfinder at NAB Sh...

20/04/2026

NAB 2026: IABM rebrands as IAMT and launches AI discovery platform and global alliance

International Association of MediaTech (IAMT), formerly known as IABM, announced...

20/04/2026

NAB 2026: Harmonic supports DIRECTV DTH platform upgrade with VOS Media Software

Harmonic (Booth W2831) announced that DIRECTV is updating its US direct-to-home (DTH) video platform using Harmonic's VOS Media Software. The deployment is...

20/04/2026

NAB 2026: Wasabi Technologies acquires Seagate Lyve Cloud business

Wasabi Technologies announced that it has acquired the Lyve Cloud business from Seagate Technology. As part of the agreement, Seagate received equity in Wasabi ...

20/04/2026

NAB 2026: EVS introduces Choreon robotics orchestration platform for unified production control

EVS (Booth N1841) has launched Choreon, a robotics controller for media producti...

20/04/2026

SportsTechBuzz at NAB 2026, Day 2: Live Reports From the Show Floor in Vegas

The NAB Show is in full swing, and the SVG and SVG Europe editorial teams are chasing down the hottest stories from all over the Las Vegas Convention Center. He...

20/04/2026

NAB 2026: Skyline Communications launches DataMiner packages on Grass Valley AMPP App Store

Skyline Communications announced the availability of its DataMiner xOps platform...

20/04/2026

NAB 2026: SNS launches Outpost, Trio and AI Suite for connected post-production workflows

Studio Network Solutions (Booth N1129) introduced a set of new products at NAB S...

20/04/2026

NAB 2026: Dell Technologies and NVIDIA present AI data platform for media workflows

Dell Technologies is showcasing its Dell AI Data Platform with NVIDIA at NAB Sho...

20/04/2026

NAB 2026: Blackmagic Design Announces Fairlight Live Software Audio Mixer

Blackmagic Design has announced Fairlight Live, a software-based live audio mixer with SMPTE 2110 support and spatial audio mixing. A public beta is available n...

20/04/2026

Live From NAB 2026: Imagine Comms Jimbo Haneklau Talks Prismon, Hybrid IP/SDI Workflows, and Cloud Playout

At the 2026 NAB Show in Las Vegas, Imagine Communications VP of Sales, Sports an...

20/04/2026

Live From NAB 2026: LiveUs Phillip Broaddus on LU900Q Launch, Nexus Cloud Platform, and REMI Growth

At the 2026 NAB Show in Las Vegas, LiveU Senior Director of Sales, Sports Philli...

20/04/2026

3 New Ways to Dive Deeper Into the Music You Love

A song that perfectly captures a moment is magic. But when you uncover the story behind it, who made it, what inspired it, and the meaning woven into the lyrics...

20/04/2026

Deity Microphones announce the PR-4

Ultra-compact 32-bit recorder set for launch Deity Microphones will soon be launching a new 32-bit six-track recorder that's been designed with producti...

20/04/2026

Lectrosonics preview the S1

Uncoming lightweight shotgun mic announced Production-sound experts Lectrosonics have recently announced the upcoming launch of a new lightweight shotgun mi...

20/04/2026

The story of Focusrite ISA

New 20-minute documentary explores iconic preamp In 2025, Focusrite commissioned a new short-form documentary with filmmaker Chris Mayes-Wright - the direct...

20/04/2026

Sampleson release Boomcha

Turn quick sketches into real drum grooves Sampleson have been experimenting with assitive production tools recently, and their latest creation aims to make...

20/04/2026

Rohde & Schwarz rolls out its full ARDRONIS counter UAS suite in a demonstration van at Counter UAS Technology Europe 2026

Rohde & Schwarz rolls out its full ARDRONIS counter UAS suite in a demonstration...

20/04/2026

Protecting America's Shores: L3Harris Keeps the Coast Guard Mission-Ready

L3Harris delivers integrated communications, navigation and C4ISR capabilities that empower the U.S. Coast Guard to protect Americas maritime interests and resp...

20/04/2026

Google Cloud Embraces the Rise of Agentic Production

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Creators Go All in on AI, Niche Content

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

NBC Sports' Jon Miller: Broadcast Is Having a Moment'

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Beyond the Lift and Shift': Cloud Migration's New Mandate

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Virtual Production Finds Its Footing

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Corporate Creators: All Companies Are Media Companies Now

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

IABM Rebrands as the International Association of MediaTech

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

CBS Detroit Debuts New AR/VR Technology-Driven Studio

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Fox Sports Taps Appear X Platform for Remote Production

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

CueScript and Lighting Design Group Expand Customer Oppor...

CueScript and Lighting Design Group Expand Customer Opportunities Through New Partnership Find both companies at 2026 NAB Show in CueScript Booth # C 4720 ...

20/04/2026

Layercake Deepens Bitmovin Integration to Power End-to-En...

[Sydney, NSW, 20 April 2026] - Layercake, the company behind the intelligent media orchestration platform Streamcake, today announced the formalisation of its i...

20/04/2026

FOX Sports selects Appear X Platform for next-generation...

Deployment spans FOX Sports' REMI infrastructure, IP production for a major global soccer event, and its Jewel Events production systems Appear, a global l...

20/04/2026

Pro Sound Effects Launches the Industry's First and Only Native Sound Effects Integration for Avid Media Composer at NAB 2026

Pro Sound Effects Launches the Industry's First and Only Native Sound Effect...

20/04/2026

SBE Elevates Fred Willard to SBE Fellow

Share Copy link Facebook X Linkedin Bluesky Email...

20/04/2026

Blackmagic Design Announces Blackmagic Camera for iOS 3.3 Update

Blackmagic Design Announces Blackmagic Camera for iOS 3.3 Update Brie Clayton April 20, 2026 0 Comments New update adds camera control and monitoring ...

20/04/2026

Maxon Announces Free Tools and Mobile Expansion of ZBrush and Cinema 4D

Maxon Announces Free Tools and Mobile Expansion of ZBrush and Cinema 4D Brie Clayton April 20, 2026 0 Comments Cinema 4D brings professional 3D workfl...

20/04/2026

Vizrt AI Keyer kills the green screen and creates virtual scenes in any environment

Vizrt AI Keyer kills the green screen and creates virtual scenes in any environm...

20/04/2026

Register now - Market & Audience Department Ask Me Anything (AMA) Session

Register now - Market & Audience Department Ask Me Anything (AMA) Session 11 February 2026 Screen Australia Head of Market & Audience Rakel Tansley Talking to...