Gamers compress 80TB map of Minecraft’s oldest anarchy server down to a 15TB download — custom .zvcr compression format and 28 bots map 1 million blocks on infamous 2b2t server

Despite the storage shortages, a brave team of Minecraft players has successfully mapped the entirety of 2b2t, arguably Minecraft’s oldest and most notorious server, and have now shared it as a 15TB download of highly compressed data that can be unpacked to the full 80TB archive. The team had to create its own custom compression format to pull off the feat.

The 2b2tplace preservation project started in 2024 and finally concluded in April of 2026 after an intensive 22 months of hard work. The team employed 28 bot accounts that tirelessly flew across the vast 2b2t world to map every single block with precision. The sheer scale of 2b2t is staggering because it encompasses well over one million blocks and includes the three primary Minecraft dimensions: the Overworld, the Nether, and the End.

The 2b2t server has a data footprint that exceeds 80 TB. Even if the team began their efforts before the recent storage shortage, it would still require an immense amount of storage capacity. Storing the entire 2b2t server would demand at least eight 8TB M.2 SSDs or, as an alternative, five 16TB SATA SSDs. Even with traditional storage, you still need three massive 36TB hard drives. We estimate the team has likely spent several thousand dollars on storage equipment, not to mention priority queue purchases and server rental costs, which totaled over $3,000 alone, according to the GitHub page.

If you are not a big Minecraft fan, 2b2t, short for 2builders2tools, is a Minecraft server characterized by its anarchic nature that launched in 2010. Unlike typical Minecraft servers, 2b2t operates with absolutely no rules, no staff moderation, and no map resets, so players have complete freedom to do whatever they want. Over the years, countless updates have dramatically reshaped the landscape, which has fueled several enthusiasts, including crayne, Fuch, mahan, Steve3, and others, to preserve the original state of 2b2t before it loses all of its essence for good.

Storing or sharing 80TB of data is insane, especially given the limited availability and overpriced storage solutions today – something on the scale of 2b2t can rapidly cause file sizes to spike to impractical levels. The archival team originally promised back in April to make the archive available in a compressed format, but that obviously created issues. As such, the team engineered a custom file compression format specifically for this project, named .zvcr (Zstd-compressed Version Controlled Regions). Common Minecraft servers use the .mca (Minecraft Anvil) file format, which is fine for single-player worlds or even small servers.

Unlike the .mca file format, which normally uses Zlib or Gzip compression, .zvcr uses the Zstd (Zstandard) algorithm that yields higher compression ratios. Zstd is superior in every way to Zlib or Gzip, whether it be compression and decompression speed or final file size. As a result, the team was able to compress the entire project to 15TB, saving up to 81.25% of space. So, now instead of needing eight 8TB M.2 or five 16TB SATA SSDs, you only need two or one to store the compressed archive, respectively. Unpacking the archive, on the other hand, is a different story.

The 2b2t server remains online so that Minecraft players can join in for their daily dose of chaos. Nevertheless, many longtime gamers argue the server has strayed from its anarchic roots. The eventual shift is the main motivation behind the 2b2tplace preservation initiative.