Magnetic Tape Data Recovery
Unreadable magnetic tape? Our Swiss laboratory recovers your data. Free diagnosis within 3 hours.
How to recover data from your magnetic tape?
Magnetic tape data recovery involves extracting backup files stored on tape media (LTO, DLT, DAT, AIT, 8mm) that has become unreadable, damaged or incompatible with available hardware. This intervention requires both a fleet of tape drives (streamers) covering all formats and mastery of proprietary backup software.
Magnetic tapes consist of a plastic ribbon coated with magnetic oxide particles whose polarity encodes data in binary. Aging, humidity, heat or a faulty streamer can degrade this magnetic layer and render data partially or completely inaccessible. Our technicians use specialized cleaning and reading equipment to restore the signal and extract every data block.
Since 2006, SOS Data Recovery has processed over 11,300 media for more than 8,000 clients — individuals and businesses alike. Our laboratory in Ins, Switzerland, has the specialized tools for all tape technologies, including large-scale projects (over 150 tapes processed in a single project).
Our commitment: a free diagnosis within 3 hours of receipt, and 80% of the cost charged only if your data is actually recovered. SOS Data Recovery is CyberSafe certified and rated 4.5/5 on Avis Vérifiés (249+ reviews).
The use of magnetic tapes is incredibly diverse and depends on various parameters such as the number of tracks, the width of the tape, the data density, and many others. Here are some examples of applications where magnetic tapes are used:
Audio
Cinéma
Télévision
Radio
Sauvegarde
Despite significant advances in optical reading technologies such as CDs, DVDs, Blu-rays, traditional hard drives, and cloud storage, magnetic tapes retain a privileged position as a backup and archiving medium for data. Their very high storage capacity and cost-effective nature make them an attractive choice for many companies and institutions concerned with preserving their information reliably and economically.
What is a backup magnetic tape?
It's a plastic tape coated with magnetic oxide, similar to an audiocassette. Reading and writing is done through a streamer.
If you go through an outage of your tape, a problem with a defective tape, or because the streamer is not compatible with your magnetic tape, SOS Data Recovery will do its very best to recover your data.
Which types of magnetic tapes do we recover?
Which backup software do we support?
There are various backup software available to meet the diverse needs of users. Here is a list of the main software specifically used for magnetic tapes:
MTF (Microsoft Tape Format)
WindowsMTF is a magnetic tape format developed by Microsoft. It is often used in conjunction with other backup software to create backups compatible with Windows systems.
Symantec/Veritas Backup Exec
EnterpriseBackup Exec, developed by Symantec (now Veritas), is a widely used data backup and recovery solution. It supports magnetic tapes and offers a comprehensive range of features for backup management.
NTBackup
LegacyNTBackup was a built-in backup utility in older versions of the Windows operating system. It supported backup to magnetic tapes and provided basic features for Windows users.
Linux (Amanda, Bacula, TAR)
Open SourceThe Linux operating system also offers backup tools compatible with magnetic tapes. Software such as Amanda, Bacula, and TAR are often used to perform tape backups in Linux environments.
Veeam
Cloud & VMVeeam is a backup and data management solution focused on virtualization and the cloud. Although it is primarily known for its virtual machine backup capabilities, Veeam also provides the ability to backup to magnetic tapes.
Retrospect
Multi-plateformeRetrospect is a cross-platform backup and data recovery software. It offers advanced features for magnetic tape backup, as well as support for other storage media.
Paragon
EnterpriseParagon provides backup and data recovery solutions for businesses and individual users. Their magnetic tape backup software offers robust features to protect important data.
EaseUS
WindowsEaseUS offers backup and data recovery software for Windows users. Their backup solution supports magnetic tapes and provides a user-friendly interface for easy configuration and management of backups.
Acronis
EnterpriseAcronis is a company specializing in backup and data recovery solutions. Their backup software supports various storage media, including magnetic tapes, offering flexible backup options.
It is important to note that this list is not exhaustive, and there are other backup software solutions available in the market. Feel free to contact us if you need to recover data from your magnetic tapes.
What are the most common magnetic tape failures?
Do you recognize one of these situations? Contact us for a free diagnosis.
Tape degradation
The magnetic oxide deteriorates over time, with humidity or heat. Data becomes partially or completely unreadable without specialized equipment.
Streamer failure
The tape drive (streamer) is defective or incompatible with your cartridges. Our technicians have a fleet of streamers covering all formats.
Incompatible format
Your tapes were written with proprietary software or format that you can no longer read. We master all common formats (MTF, tar, Backup Exec, etc.).
Overwritten backup
A backup rotation has overwritten critical data. In some cases, it is possible to recover earlier versions still present on the tape.
Damaged tape
Broken, jammed in the streamer or deformed tape. Our specialists can physically repair the tape and extract the remaining data.
Software corruption
The backup catalog or tape metadata is corrupted. The content still exists but the software can no longer list or restore the files.
How does data recovery work?
From free diagnosis to secure delivery — a transparent 4-step process, entirely performed in our Swiss laboratory.
Free diagnosis within 3 hours
Send your media by secure post, drop it at one of our 30 collection points across Switzerland, or bring it directly to our laboratory in Ins. Our team performs a full analysis within 3 hours of receipt — free and with no commitment.
Transparent quote before any work
You receive a detailed quote outlining the type of failure, recovery chances and exact cost. You approve before any work begins. Full payment on success — only attempt costs are charged if recovery fails.
Recovery under ISO 5 laminar flow
Our technicians work under ISO 5 certified laminar flow with specialised tools (PC-3000). Your data never leaves our CyberSafe-certified and CyberSafe partner Swiss laboratory. Duration: 2 to 10 business days depending on complexity.
Secure delivery of your data
Your recovered data is delivered on a new encrypted drive, or via secure download according to your preference. Original media can be destroyed on request to guarantee confidentiality.
Has your model already been recovered?
Thousands of magnetic tapes referenced in our database. Check if we have already recovered a tape identical to yours.
Frequently asked questions
Our specialists answer the most common questions.
Can you read old or proprietary tape formats?
Yes, we can read the vast majority of old and proprietary tape formats. Our laboratory has a collection of hardware readers and specialized software covering dozens of obsolete or rarely used formats today, including open reel tapes, DAT, DDS, LTO, QIC, Exabyte, DLT cartridges, and many other industrial or proprietary formats.
For each medium entrusted to us, we precisely identify the format, select the appropriate reading equipment, and extract the data into a modern and usable format. In the case of an unknown or very rare format, we perform a preliminary analysis to assess the feasibility of recovery before any intervention.
Before sending your tapes, note all the information visible on the label (brand, capacity, date, original software). These details accelerate format identification and increase the chances of complete data recovery.
Can you restore the exact files or only a raw image of the tape?
Restoring exact files from a tape is possible in most cases, with complete preservation of the original directory structure (file names, folders, metadata). According to industry data, over 85% of magnetic tape restorations result in complete file recovery when the tape is not severely damaged.
Two recovery modes are available:
- Exact File Restoration — Recovery of each file individually with its original path, metadata, and permissions. This option is possible when the tape is readable and the format (LTO, DDS, DLT, etc.) is identifiable.
- Raw Tape Image — Bit-by-bit copy of the entire contents of the tape, provided when file-by-file recovery is not possible due to partial corruption, encryption, or a non-standard proprietary format.
A tape is considered too corrupted for a complete restoration only when the sectors containing the index tables or file metadata are physically unreadable. In this case, the raw image allows preserving all recoverable data for further processing.
Before any restoration, specify the tape format (LTO-4, LTO-6, DDS-4, etc.) and the backup software originally used (Veritas, Arcserve, Bacula, etc.). This information can significantly increase the exact file recovery rate and reduce turnaround times.
Do you work with software backup formats like Veritas, Arcserve, Veeam, etc.?
Yes, we have experience with many professional backup formats.
Even when the exact backup software is unknown or undocumented, we can often identify it through a hexadecimal analysis of the tape, a technique that examines the binary structure of the data to recognize the signatures specific to each format.
Before contacting us, note if possible the name of the backup software used, its version, and the type of media (LTO tape, DAT, disk, etc.). This information speeds up the diagnosis—but its absence does not block recovery, thanks to our hexadecimal analysis.
What are the rates for magnetic tape data recovery?
Magnetic tape data recovery rates vary depending on four main factors: the type of tape (LTO, DLT, DAT, 8mm, etc.), the backup format used, the physical condition of the tape, and the volume of data to be recovered. A personalized quote is established after a free, no-obligation initial analysis, allowing for a precise evaluation of the feasibility and cost of the intervention.
Factors influencing the recovery rate
- Magnetic tape type: LTO (generations 1 to 9), DLT/SDLT, DAT (DDS), 8mm, QIC — each format requires specific equipment and expertise
- Backup format: native backups, third-party software (Veritas, Arcserve, Bacula, etc.) or proprietary formats
- Physical condition of the tape: tape in good condition, degraded, stretched, or physically damaged
- Data volume: capacity ranging from a few GB to several TB depending on the tape generation
Good to know: The initial analysis is carried out without obligation. The final quote is communicated before any recovery work begins.
To obtain an accurate quote, prepare the following information before contacting the service provider: the type and generation of the tape (written on the label), the backup software used during writing, the approximate date of last use, and a description of the incident (unreadable tape, software error, physical damage). These elements help speed up the initial analysis and obtain a reliable cost estimate from the first contact.
What happens if my backup tape is encrypted, and how can I recover my data?
An encrypted backup tape is a tape whose data has been encoded using a cryptographic algorithm, requiring a specific key or software to access the original content.
Here's what happens depending on your situation:
- You have the decryption key or the original software: Data restoration is possible with a high success rate. Our technicians use your decryption tools to access the data before proceeding with the recovery.
- You no longer have the key or the software: Recovery is still technically feasible in some cases (weak encryption, partially accessible metadata), but becomes significantly more complex, and results cannot be guaranteed.
- Strong encryption without the key (AES-256, etc.): Without the cryptographic key, recovering the encrypted data is currently impossible, regardless of the service provider.
Systematically document the software, version, and encryption key used for each tape backup session. Store this information in a digital vault or a secure password manager, separate from your physical backup media.
What if I don't know the software used at the time for the backup?
Identifying the original backup software is not necessary to initiate a restoration. Through a hexadecimal analysis of the raw tape content, our experts can identify the software used during the initial backup—such as Veritas Backup Exec, Arcserve UDP, Veeam Backup & Replication, or Symantec NetBackup.
Each backup solution leaves a unique structural footprint in the data: proprietary headers, metadata blocks, indexing sequences. This digital signature allows us to reconstruct the exact technical context and adapt our restoration tools accordingly, even without documentation or access to the original system.
Even if you no longer have the software, the original server, or the technical documentation, carefully store the magnetic tape in a stable environment (temperature between 15 and 25 °C, relative humidity between 40 and 60%). A properly stored tape remains readable for several decades after its creation, allowing sufficient time for professional restoration.
What if I don't know what's on my tape?
Unknown tape content identification is a technical analysis process used to determine the format, codec, and data stored on magnetic or digital media, without requiring the original software or associated documentation.
We perform a comprehensive initial analysis to identify the contents of your tape. This procedure includes:
- Format Reading and Detection – Identifying the tape type (DAT, DLT, LTO, U-matic, etc.) and the encoding system used
- Metadata Extraction – Recovering header information to determine the original software or system
- Diagnostic Report – Providing a detailed report specifying the identified content and available recovery options
According to industry data, more than 80% of tapes without documentation can be identified through analysis of format signatures and embedded metadata.
Before sending your tape, note anything you remember: approximate creation date, computer system used at the time, or software that generated the data. Even partial information can significantly reduce the identification time and increase the chances of complete recovery.
What to do if my magnetic tape is broken or stuck in a drive?
A broken or stuck magnetic tape in a drive requires immediate professional intervention: any attempt at manual extraction risks aggravating the damage and making data recovery impossible. Our magnetic tape recovery experts have specialized equipment to extract stuck tapes without further data loss, and perform the necessary physical repairs in an ISO-certified cleanroom, a controlled environment eliminating particles that could permanently damage the media.
Steps to take if a tape is stuck or broken
- Immediately stop the drive – Do not attempt to restart playback or force the tape to eject: each additional attempt increases the risk of irreversible laceration.
- Do not disassemble the cartridge – Opening a cartridge outside of a cleanroom environment exposes the tape to dust and humidity that can destroy magnetic data.
- Store the tape at room temperature – Avoid temperature variations (ideally between 18°C and 22°C) and excessive humidity before handling.
- Contact our experts without delay – We will evaluate the condition of the media free of charge and define the appropriate recovery protocol (mechanical extraction, resplicing, head cleaning, or cleanroom transfer).
If a tape is stuck, resist the urge to "force" the ejection. Turn off the drive, note the exact model of the cartridge (format, capacity, manufacturer) and immediately contact a specialist. The faster the intervention, the higher the data recovery rate.
What to do if my tapes are no longer readable by my backup software?
The loss of readability of a tape by your backup software is a situation that can be recovered in most cases thanks to low-level reading, a technique for direct extraction of raw data that bypasses failing software layers.
Even if the software no longer recognizes the tape or the catalog is lost, our experts analyze the raw content of the tape byte by byte. In the vast majority of cases, we can reconstruct the file catalog and allow you to selectively restore your data.
Key takeaway: Do not attempt to rewrite or reformat the tape before attempting recovery. Any write operation may permanently overwrite recoverable data.
Always keep a copy of the backup catalog on a medium separate from the tape itself. In the event of catalog loss, manual reconstruction is possible but significantly increases restoration times. If your backup software no longer recognizes your tapes, contact a specialist before any manipulation: an uncontrolled intervention can compromise a recovery that would have been possible.
What to do if the backup catalog is lost or corrupted?
The backup catalog is the index that allows backup software to list and locate files stored on a magnetic tape. Without it, the software can no longer identify the available data or restore it directly.
If the catalog is lost or corrupted, it is often possible to rebuild it by complete sequential reading of the tape: the process involves scanning the entire medium to reconstruct the list of files present, block by block. This operation is longer than a standard restore — allow several hours depending on the capacity of the tape (LTO-8: up to 12 TB native) — but it allows you to recover the data without depending on the original catalog.
Reconstruction is possible even without the original backup software (Veritas NetBackup, Veeam, Arcserve, etc.), thanks to specialized tools capable of reading the proprietary formats of the main solutions on the market.
Do not attempt to rewrite or reformat the tape before attempting recovery — even a partially corrupted catalog may contain exploitable information. Entrust the media to a specialist with the appropriate tools to maximize the recovery rate.
What types of magnetic tapes do you support?
Supported magnetic tapes include a wide range of professional and consumer formats: LTO (Linear Tape-Open), all generations (LTO-1 to LTO-9); DAT/DDS (Digital Audio Tape / Digital Data Storage), formats DAT-72, DAT-160 and DAT-320; DLT and SDLT (Digital Linear Tape / Super DLT); QIC (Quarter-Inch Cartridge); Travan; as well as proprietary and professional formats on request.
According to the LTO Consortium, the LTO format represents more than 90% of the professional magnetic tape market in 2024, with a native capacity of up to 18 TB per cartridge (LTO-9). Our technicians are trained to recover data from obsolete or damaged media, regardless of the format.
Yes, we can read the vast majority of old and proprietary tape formats. Our laboratory has a collection of hardware readers and specialized software covering dozens of obsolete or rarely used formats today, including open reel tapes, DAT, DDS, LTO, QIC, Exabyte, DLT cartridges, and many other industrial or proprietary formats.
For each medium entrusted to us, we precisely identify the format, select the appropriate reading equipment, and extract the data into a modern and usable format. In the case of an unknown or very rare format, we perform a preliminary analysis to assess the feasibility of recovery before any intervention.
Before sending your tapes, note all the information visible on the label (brand, capacity, date, original software). These details accelerate format identification and increase the chances of complete data recovery.
Restoring exact files from a tape is possible in most cases, with complete preservation of the original directory structure (file names, folders, metadata). According to industry data, over 85% of magnetic tape restorations result in complete file recovery when the tape is not severely damaged.
Two recovery modes are available:
- Exact File Restoration — Recovery of each file individually with its original path, metadata, and permissions. This option is possible when the tape is readable and the format (LTO, DDS, DLT, etc.) is identifiable.
- Raw Tape Image — Bit-by-bit copy of the entire contents of the tape, provided when file-by-file recovery is not possible due to partial corruption, encryption, or a non-standard proprietary format.
A tape is considered too corrupted for a complete restoration only when the sectors containing the index tables or file metadata are physically unreadable. In this case, the raw image allows preserving all recoverable data for further processing.
Before any restoration, specify the tape format (LTO-4, LTO-6, DDS-4, etc.) and the backup software originally used (Veritas, Arcserve, Bacula, etc.). This information can significantly increase the exact file recovery rate and reduce turnaround times.
Yes, we have experience with many professional backup formats.
Even when the exact backup software is unknown or undocumented, we can often identify it through a hexadecimal analysis of the tape, a technique that examines the binary structure of the data to recognize the signatures specific to each format.
Before contacting us, note if possible the name of the backup software used, its version, and the type of media (LTO tape, DAT, disk, etc.). This information speeds up the diagnosis—but its absence does not block recovery, thanks to our hexadecimal analysis.
Magnetic tape data recovery rates vary depending on four main factors: the type of tape (LTO, DLT, DAT, 8mm, etc.), the backup format used, the physical condition of the tape, and the volume of data to be recovered. A personalized quote is established after a free, no-obligation initial analysis, allowing for a precise evaluation of the feasibility and cost of the intervention.
Factors influencing the recovery rate
- Magnetic tape type: LTO (generations 1 to 9), DLT/SDLT, DAT (DDS), 8mm, QIC — each format requires specific equipment and expertise
- Backup format: native backups, third-party software (Veritas, Arcserve, Bacula, etc.) or proprietary formats
- Physical condition of the tape: tape in good condition, degraded, stretched, or physically damaged
- Data volume: capacity ranging from a few GB to several TB depending on the tape generation
Good to know: The initial analysis is carried out without obligation. The final quote is communicated before any recovery work begins.
To obtain an accurate quote, prepare the following information before contacting the service provider: the type and generation of the tape (written on the label), the backup software used during writing, the approximate date of last use, and a description of the incident (unreadable tape, software error, physical damage). These elements help speed up the initial analysis and obtain a reliable cost estimate from the first contact.
An encrypted backup tape is a tape whose data has been encoded using a cryptographic algorithm, requiring a specific key or software to access the original content.
Here's what happens depending on your situation:
- You have the decryption key or the original software: Data restoration is possible with a high success rate. Our technicians use your decryption tools to access the data before proceeding with the recovery.
- You no longer have the key or the software: Recovery is still technically feasible in some cases (weak encryption, partially accessible metadata), but becomes significantly more complex, and results cannot be guaranteed.
- Strong encryption without the key (AES-256, etc.): Without the cryptographic key, recovering the encrypted data is currently impossible, regardless of the service provider.
Systematically document the software, version, and encryption key used for each tape backup session. Store this information in a digital vault or a secure password manager, separate from your physical backup media.
Identifying the original backup software is not necessary to initiate a restoration. Through a hexadecimal analysis of the raw tape content, our experts can identify the software used during the initial backup—such as Veritas Backup Exec, Arcserve UDP, Veeam Backup & Replication, or Symantec NetBackup.
Each backup solution leaves a unique structural footprint in the data: proprietary headers, metadata blocks, indexing sequences. This digital signature allows us to reconstruct the exact technical context and adapt our restoration tools accordingly, even without documentation or access to the original system.
Even if you no longer have the software, the original server, or the technical documentation, carefully store the magnetic tape in a stable environment (temperature between 15 and 25 °C, relative humidity between 40 and 60%). A properly stored tape remains readable for several decades after its creation, allowing sufficient time for professional restoration.
Unknown tape content identification is a technical analysis process used to determine the format, codec, and data stored on magnetic or digital media, without requiring the original software or associated documentation.
We perform a comprehensive initial analysis to identify the contents of your tape. This procedure includes:
- Format Reading and Detection – Identifying the tape type (DAT, DLT, LTO, U-matic, etc.) and the encoding system used
- Metadata Extraction – Recovering header information to determine the original software or system
- Diagnostic Report – Providing a detailed report specifying the identified content and available recovery options
According to industry data, more than 80% of tapes without documentation can be identified through analysis of format signatures and embedded metadata.
Before sending your tape, note anything you remember: approximate creation date, computer system used at the time, or software that generated the data. Even partial information can significantly reduce the identification time and increase the chances of complete recovery.
A broken or stuck magnetic tape in a drive requires immediate professional intervention: any attempt at manual extraction risks aggravating the damage and making data recovery impossible. Our magnetic tape recovery experts have specialized equipment to extract stuck tapes without further data loss, and perform the necessary physical repairs in an ISO-certified cleanroom, a controlled environment eliminating particles that could permanently damage the media.
Steps to take if a tape is stuck or broken
- Immediately stop the drive – Do not attempt to restart playback or force the tape to eject: each additional attempt increases the risk of irreversible laceration.
- Do not disassemble the cartridge – Opening a cartridge outside of a cleanroom environment exposes the tape to dust and humidity that can destroy magnetic data.
- Store the tape at room temperature – Avoid temperature variations (ideally between 18°C and 22°C) and excessive humidity before handling.
- Contact our experts without delay – We will evaluate the condition of the media free of charge and define the appropriate recovery protocol (mechanical extraction, resplicing, head cleaning, or cleanroom transfer).
If a tape is stuck, resist the urge to "force" the ejection. Turn off the drive, note the exact model of the cartridge (format, capacity, manufacturer) and immediately contact a specialist. The faster the intervention, the higher the data recovery rate.
The loss of readability of a tape by your backup software is a situation that can be recovered in most cases thanks to low-level reading, a technique for direct extraction of raw data that bypasses failing software layers.
Even if the software no longer recognizes the tape or the catalog is lost, our experts analyze the raw content of the tape byte by byte. In the vast majority of cases, we can reconstruct the file catalog and allow you to selectively restore your data.
Key takeaway: Do not attempt to rewrite or reformat the tape before attempting recovery. Any write operation may permanently overwrite recoverable data.
Always keep a copy of the backup catalog on a medium separate from the tape itself. In the event of catalog loss, manual reconstruction is possible but significantly increases restoration times. If your backup software no longer recognizes your tapes, contact a specialist before any manipulation: an uncontrolled intervention can compromise a recovery that would have been possible.
The backup catalog is the index that allows backup software to list and locate files stored on a magnetic tape. Without it, the software can no longer identify the available data or restore it directly.
If the catalog is lost or corrupted, it is often possible to rebuild it by complete sequential reading of the tape: the process involves scanning the entire medium to reconstruct the list of files present, block by block. This operation is longer than a standard restore — allow several hours depending on the capacity of the tape (LTO-8: up to 12 TB native) — but it allows you to recover the data without depending on the original catalog.
Reconstruction is possible even without the original backup software (Veritas NetBackup, Veeam, Arcserve, etc.), thanks to specialized tools capable of reading the proprietary formats of the main solutions on the market.
Do not attempt to rewrite or reformat the tape before attempting recovery — even a partially corrupted catalog may contain exploitable information. Entrust the media to a specialist with the appropriate tools to maximize the recovery rate.
Supported magnetic tapes include a wide range of professional and consumer formats: LTO (Linear Tape-Open), all generations (LTO-1 to LTO-9); DAT/DDS (Digital Audio Tape / Digital Data Storage), formats DAT-72, DAT-160 and DAT-320; DLT and SDLT (Digital Linear Tape / Super DLT); QIC (Quarter-Inch Cartridge); Travan; as well as proprietary and professional formats on request.
According to the LTO Consortium, the LTO format represents more than 90% of the professional magnetic tape market in 2024, with a native capacity of up to 18 TB per cartridge (LTO-9). Our technicians are trained to recover data from obsolete or damaged media, regardless of the format.