ArGest Backup User Guide

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  5. The BRU Tape Format

The BRU Tape Format

BRU is not simply a variation of tar, or any other archival format, it’s a completely different archive format definition. To ensure the highest level of recoverability, BRU archives contain far more metadata, or filesystem information about the data that was backed up. Additionally, rather than simply reading the data from your filesystem and copying it to the archive destination, BRU reads your data in 2 Kilobyte segments and performs additional checksum generation at that 2KB level.

While this operation results in a slight increase in the overall archive size when compared to the original data, the additional filesystem metadata and checksum information provided by this increase provides very robust verification and recovery capabilities that other backup applications lack.