Data Archiving & LTO Tape Backup
Air-Gapped 3-2-1 Backups, LTFS, and Petabyte-Scale Cold Storage
Long-Term Data Archiving Done Right
Some data you need fast. Most data you just need to keep: footage, scans, logs, finished projects, regulatory records, raw media. Storing all of it on disk or in the cloud is expensive and, in the case of ransomware, dangerous. We design archive tiers built on LTO tape and LTFS so cold data sits on the cheapest, safest medium available while staying genuinely recoverable.
Why Tape Still Wins for Long-Term Storage
Magnetic tape is over 70 years old and still the most cost-effective storage medium on the planet. At roughly half a cent per gigabyte, nothing else comes close, and the gap only widens at scale. The other advantage is physical: a cartridge that is not in the drive is air-gapped by definition. It cannot be encrypted by ransomware, deleted by a compromised admin account, or quietly corrupted by a failing controller. For an archive measured in years, those two properties (cost and isolation) are exactly what matter.
The trade-off is access pattern. Tape is sequential, so it is the wrong tool for data you read all day and the right tool for data you write once and read rarely. The skill is in drawing that line correctly and building the workflow around it, which is the part we handle.
The 3-2-1 Rule and Air-Gapped Backups
The durable standard for backups is 3-2-1: three copies of your data, on two different media types, with one copy off-site or offline. The offline copy is the one that survives a ransomware event, and tape is the natural fit because an unmounted cartridge is invisible to the network. We build a 3-2-1 strategy around what you already run, typically with a NAS as primary storage, replication for the second copy, and a tape archive as the air-gapped third. The goal is a backup that is boring: tested, documented, and there when you need it.
LTFS: Tape That Works Like a Drive
Old tape backups locked your data inside a proprietary format that needed the original software to read. The Linear Tape File System (LTFS) changed that. With LTFS a cartridge mounts like a normal drive, files and folders visible, readable by standard tools. We standardize archives on LTFS so your data stays portable: independent of any one backup vendor, and readable across the tape generations a drive supports. That portability is what keeps an archive a real asset instead of a liability you cannot open in ten years.
LTO Generations and Capacity Planning
A current LTO-9 cartridge holds 18 TB native, around 45 TB compressed, and LTO-10 roughly doubles that. A single desktop autoloader can hold hundreds of terabytes; a small rack library holds petabytes. The catch is the generation roadmap: newer drives only read back a limited number of prior generations, and LTO-10 in particular is not backward compatible at all. Buying the wrong generation, or the right one without a migration plan, is how organizations end up with tapes no current drive can read.
We do the capacity math up front (how much you generate, how long you must retain it, how fast it grows) and choose the generation and library size that fit, with a documented migration path so the archive ages gracefully instead of stranding you.
Petabyte-Scale Archive Architecture
We have built and run storage at genuine scale, including a 2 PB video platform, and that experience translates directly to archive design:
- Tiering policy: what stays on fast disk, what moves to tape, and when
- Catalog and index design so you can find a single file across millions without mounting every cartridge
- Automated ingest and verification so archived data is checked, not assumed
- Retention and retrieval workflows that match your compliance and operational needs
Migrating Off Aging Disk and Cloud Bills
If your cloud cold-storage bill keeps climbing, or you are buying disk shelves just to hold data nobody touches, an archive tier usually pays for itself quickly. We assess what you are storing, separate the active set from the truly cold set, and move the cold set to tape with a clear retrieval path. We can also read in old tapes you already hold and consolidate everything onto a current, supported format.
What a Deployment Includes
A typical engagement covers capacity and generation planning, hardware selection (standalone drive, autoloader, or library), LTFS configuration, the ingest and verification workflow, integration with your existing storage and backup tooling, and a tested restore before we call it done. Every deployment ships with documentation covering the hardware, the catalog, the retention policy, and step-by-step recovery procedures your team can follow without us in the room.
Frequently Asked Questions
Is LTO tape still worth it in 2026?
For long-term retention and archival, yes. Tape costs roughly half a cent per gigabyte, a fraction of cloud cold storage once you factor in retrieval and egress fees, and a tape sitting on a shelf draws no power and is physically disconnected from the network. For data you must keep for years but rarely read, nothing else is as cheap or as safe.
How is tape different from a NAS?
A NAS gives you fast, always-online storage for active data. Tape is for cold archives and air-gapped backups: data you need to retain but not access daily. Most businesses we work with use both, with the NAS as primary storage and tape as the offline, ransomware-proof archive tier. We design the two to work together.
What is the 3-2-1 backup rule?
Three copies of your data, on two different types of media, with one copy kept off-site or offline. Tape is the natural fit for that offline copy because an unmounted cartridge cannot be encrypted by ransomware or deleted by a compromised account. We build 3-2-1 strategies around your existing infrastructure rather than replacing it.
How much data can one LTO cartridge hold?
A current LTO-9 cartridge holds 18 TB of native data, around 45 TB compressed. LTO-10 roughly doubles that. A single small library can therefore hold petabytes. We handle capacity planning, generation selection, and the migration path so you are not stranded on aging hardware.
Can you recover data from old tapes we already have?
Often, yes. We assess the generation, format, and drive availability, then read what is recoverable into modern storage. Because we treat tape through LTFS as a filesystem rather than a proprietary backup blob, archives stay portable across generations the drive supports.
Ready to Build a Real Archive?
Tell us what you are storing and how long you need to keep it. We will design an archive tier that cuts your storage cost and gives you an air-gapped copy that survives a bad day.
Want the background first? Read why LTO tape is still the cheapest way to store data.