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the one element that frustrates me is when vendors (typically disk-centric ones) point to tape as a technology that is outdated and unreliable.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 ...

07/10/2026

Dalet Flex LTS Delivers Smarter Media Operations from Ingest to Distribution

Dalet, a leading technology and service provider for media-rich organizations, today announced the latest Long-Term Supported (LTS) release of Dalet Flex. Build...

06/09/2026

Dolby and MagentaTV Bring Fans Closer to the FIFA World Cup 2026 in Germany with Dolby Vision and Dolby Atmos

June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...

19/08/2026

Henry Alexander Joins BCE as Sales Director

Henry joins BCE as the company accelerates its commercial strategy and expands its international presence across the media, broadcast and technology markets. He...

19/08/2026

iWedia Announces Advanced Android DRAM Optimisation Proce...

iWedia, a leading provider of software solutions for connected TV devices, today announced a major milestone in Android platform optimization with the successfu...

19/08/2026

NTP Technology announces ST 2110-30-RAVENNA 128-channel A...

NTP Technology announces that ST 2110-30 audio-over-IP connectivity with AES67 and RAVENNA capabilities is now available for the brand's world-class audio i...

19/08/2026

ORF goes full IP with Net Insight in nationwide network o...

Net Insight has been selected to provide its Nimbra platform by the service provider Big Blue Marble, formerly ORS Group, as the core media transport solution f...

19/08/2026

Coventry City Trophy Parade Extends LiveU LIQ Beyond the...

LiveU has supported Coventry City FC and several other top-flight UK football clubs through one of their most demanding live production challenges of the year, ...

19/08/2026

Nature Seekers Documentary Shot with Blackmagic URSA Cine 12K LF

Nature Seekers Documentary Shot with Blackmagic URSA Cine 12K LF Brie Clayton August 18, 2026 0 Comments Filming endangered turtles required camera...

19/08/2026

Neyrinck Brings D-Control Consoles Back to Life on Apple Silicon with D-Control Basic

Neyrinck Brings D-Control Consoles Back to Life on Apple Silicon with D-Control ...

19/08/2026

ABC Files First Amendment Lawsuit Against FCC

Share Copy link Facebook X Linkedin Bluesky Email...

19/08/2026

Nielsen: Fox and NBCUniversal Score with FIFA World Cup 2026

Share Copy link Facebook X Linkedin Bluesky Email...

19/08/2026

ESPN Co-Founder Bill Rasmussen Dies At 93

Share Copy link Facebook X Linkedin Bluesky Email...

19/08/2026

Study: NBA Ad Revenue Hit $2.1 Billion Last Season

Share Copy link Facebook X Linkedin Bluesky Email...

19/08/2026

Nexstar's WNCN Donates ENG Van for Training

Share Copy link Facebook X Linkedin Bluesky Email...

19/08/2026

Riedel Brings Professional Live Production Into the Class...

Riedel Communications today announced that Edith Cowan University (ECU) in Perth, Australia, implemented a comprehensive communications infrastructure that brin...

19/08/2026

QuickLink Showcases New 4K Capabilities Across StudioEdge...

QuickLink, a leading provider of award-winning video production and remote guest contribution solutions, will spotlight a major leap forward in remote guest con...

19/08/2026

EMAM together with PlayBox Neo and SNEWS launch combined...

Integrated platform melds media asset management, playout automation and newsroom workflows EMAM, PlayBox Neo and SNEWS have officially launched Nuvex, a conne...

19/08/2026

Screen Australia releases the Private Investment Toolkit to strengthen screen industry financing pathways

Screen Australia releases the Private Investment Toolkit to strengthen screen in...

19/08/2026

Do Aussies truly value local content? Unpacking Screen Currency 2026 with Deirdre Brennan

Do Aussies truly value local content? Unpacking Screen Currency 2026 with Deirdr...

19/08/2026

RT TO AIR HISTORIC KATIE TAYLOR FIGHT IN CROKE PARK

On Saturday September 5 Katie Taylor will step into the ring for the fight of her life against Flora Pili in front of 80,000 fans in Croke Park. A legendary fig...

18/08/2026

SportStream 2026 Virtual Event Set for September 15-17

SportStream 2026, a free three-day virtual event, will take place September 15-17. One registration provides access to all three days of live programming and on...

18/08/2026

IBC 2026: BeckTV to Debut BeckFlow Documentation Platform

BeckTV will introduce BeckFlow to the European market at IBC2026, demonstrated on the Providius stand (10.F53). BeckFlow is a web-based schematic documentation...

18/08/2026

IBC 2026: Boland Communications to Introduce ST 2110 Option for 4K Monitors

Boland Communications will introduce a SMPTE ST 2110 input option for its 4K monitors at IBC2026, along with a new 55-inch super-narrow bezel display for video ...

18/08/2026

Seattle Seahawks Integrate Dolby OptiView with Dolby Vision for Fan Streaming

Dolby Laboratories and the Seattle Seahawks have announced a partnership integrating Dolby OptiView into the Seahawks' live streaming coverage, making the S...

18/08/2026

Insights from BMG's Graham Taylor on the Role of a Sports Producer in Live Broadcast Production

For BMG Executive Producer of Sports Production, Graham Taylor, producing live s...

18/08/2026

TMRW Sports Names Rufus Hack as President of Golf

TMRW Sports has appointed Rufus Hack as President of Golf, a newly created role in which he will lead the company's golf businesses including TGL presented ...

18/08/2026

SMT To Deliver Race Technology for Freedom 250 IndyCar Broadcast

SMT will provide race technology for FOX Sports' coverage of the Freedom 250 Grand Prix of Washington, D.C. on August 23, when the NTT INDYCAR SERIES races ...

18/08/2026

HMA's Creator Collective Pairs Digital Creators, Beat Writers in New Model for Local-Sports Coverage

The live, YouTube-native roundtables combine fan voices, credentialed reporters,...

18/08/2026

Behind The Mic: FOX Sports Shares Broadcast Lineup for 2026 NFL Season and College Football Season

Behind The Mic provides a roundup of recent news regarding on-air talent, includ...

18/08/2026

Miami Heats Ed Filomia on Rebuilding Kaseya Centers Video Infrastructure and 29 Years With the Heat

The industry legend sounds off on replacing the Heat's iconic Medusa score...

18/08/2026

Bill Rasmussen, ESPN Founder and Sports Broadcasting Hall of Famer, Dies at 93

William F. Rasmussen, the sports fan-turned broadcaster and entrepreneur whose out-of-the-box idea of a 24-hour cable sports network, ESPN, changed forever the ...

18/08/2026

DAZN Completes Acquisition of ViewLift

DAZN Group has completed its acquisition of ViewLift, a provider of streaming and digital solutions for sports content owners. The acquisition was first announc...

18/08/2026

American Association of Professional Baseball Adds SI TV as Broadcast Partner

The American Association of Professional Baseball (AAPB) has added SI TV, Sports Illustrated's 24/7 streaming channel, as a broadcast partner for the remain...

18/08/2026

Esports Foundation Postpones Inaugural Esports Nations Cup to November 2027

The Esports Foundation has announced that the inaugural Esports Nations Cup (ENC), originally scheduled for November 2026 in Riyadh, will be postponed to Novemb...

18/08/2026

Diversified Launches Global Managed Services Practice

Diversified has announced a new Global Managed Services Practice, consolidating the company's managed services capabilities into one organization. Rob Mello...

18/08/2026

Appear Completes REMI Proof of Concept with Thoroughbred Racing Productions

Appear has completed a proof of concept with Thoroughbred Racing Productions (TRP), demonstrating multi-camera remote live production over bonded 5G cellular an...

18/08/2026

IBC 2026: Riedel Implements Live Production Infrastructure at Edith Cowan University

Riedel Communications has announced that Edith Cowan University (ECU) in Perth, ...

18/08/2026

Panoramic from Panorama Labs

Company launch with stereo-imaging tool Panoramic is the debut release from Panorama Labs, a new company formed by mastering engineer Nicholas Di Lorenzo. C...

18/08/2026

Focusrite extend Control 2 support

Control software now available for older interfaces Focusrite have just announced the launch of an update that extends Control 2 software support their Scar...

18/08/2026

Call for the 20th Annual South African Film and Television Awards (SAFTAs20) Jury

The National Film and Video Foundation (NFVF), an agency of the Department of Sp...

18/08/2026

Corridor Television Pays $27,000 for Violating FCCs EAS Rules

Share Copy link Facebook X Linkedin Bluesky Email...

18/08/2026

Disney's ABC Files First Amendment Lawsuit Against the FCC

Share Copy link Facebook X Linkedin Bluesky Email...

18/08/2026

Lightware Integrates with SpectralBot to Accelerate AV Tr...

Lightware announces an integration with SpectralBot that helps system integrators and AV operators troubleshoot faster using augmented reality (AR), AI-assisted...

18/08/2026

Command Frame for After Effects

Command Frame for After Effects Scott Black August 18, 2026 0 Comments Free download, demonstrations, hands-on tests, and creator resources Want to t...

18/08/2026

Dot Group to show how cutting carbon cuts cost - live at...

At Stand 14.A57, the data company will demonstrate GreenDot and IBM Aspera together, giving media and entertainment businesses real-time visibility of what thei...

18/08/2026

Blue Lucy launches Connected Value Audit

New tool provides a robust audit of operational workflows, calculating the tangible value each delivers today, and informing business decisions for tomorrow. W...

18/08/2026

Media Utilities transitions to Media Utilities - a DigiNe...

Media Utilities is integrating its activities into DigiNet and will maintain a recognisable presence in the market under the name: Media Utilities, a DigiNet br...

18/08/2026

Appear demonstrates broadcast-grade REMI production over...

Proof of Concept validates reliable multi-camera live production from remote racecourses without fixed network infrastructure Appear ASA (Appear, OSE:APR), a g...

18/08/2026

Stingr brings frictionless second-screen interaction to I...

Stingr, a new venture from the founders of Hornets Tech, is bringing its second-screen interaction platform to IBC2026. The second screen has never really wor...