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LTO roadmap extends to 365 TB per cartridge as tape storage refuses to die

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LTO roadmap extends to 365 TB per cartridge as tape storage refuses to die

In a world where SSDs with up to 256TB capacity are about to enter the scene to compete against hard disk drives that store over 40TB, magnetic tape storage may seem archaic. However, the 25-year-old Linear Tape-Open (LTO) format continues to evolve at a rather impressive pace.

The current LTO-10 generation stores up to 40TB of uncompressed data per cartridge, while HPE, IBM, and Quantum — the companies behind the LTO Program — now envision LTO-14 cartridges with up to 365TB of native capacity. But capacity is not the only advantage of LTO. In fact, the consortium has deliberately slowed its capacity roadmap in a bid to prioritize reliability, cost per terabyte, and manageable backup and recovery times over the previous goal of doubling capacity with every generation.

LTO began in 2000 with the LTO-1 format, which stored just 100GB of data natively and transferred it at 20 MB/s. Since then, capacity increased to 200GB with LTO-2, 400GB with LTO-3, 800GB with LTO-4, 1.5TB with LTO-5, 2.5TB with LTO-6, 6TB with LTO-7, 12TB with LTO-8, and 18TB with LTO-9.

The original LTO-10 media introduced in 2025 increased native capacity to 30TB, whereas an extended-length LTO-10 cartridge announced later increased it further to 40TB.

LTO cartridge capacity has increased by a factor of 400 in about 25 years without changing the form-factor itself. 5-inch hard drives increased by roughly 585 times over the same period, from around 75GB in 2000 to as much as 44 TB today, so tape has evolved at a slower pace.


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