Limits RegistryPUBLIC RECORDLimits RegistryResearch Console →Arithmetic block-address ceiling from 2^64 blocks of 4 KiB; practical implementation limits may be lower.
The question, scope, and sources behind this Registry record.
Under the recorded filesystem formats version and parameters, establish 64 ZiB.
Current frontiers derived from accepted Claims.
The accepted equality closes this optimization result.
Assertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-003703. ext4 64-bit address-space size with 4 KiB blocks. 2026.