The Silent Brick System uses Erasure Resilient Coding (ERC) as the storage method in its
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Virtual Tape Library
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Compliant archive
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SNAS ERC
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Virtual Tape Library
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SNAS ERC
Here, data is split into fragments, enhanced with redundant pieces, and reencoded. The data is then distributed across multiple storage devices. This method ensures a high level of data security.
The Silent Brick System includes a digital data verification feature (Digital Audit). Each individual bit of the stored data is regularly and automatically checked for errors. Thanks to the high redundancy reserves of the Silent Brick Library, an affected hard drive can be repaired or powered down during operation without any data loss.
Silent Brick Storage Containers are populated with data storage devices from various production batches. This prevents data loss due to batch defects.
The Silent Brick System employs the ZFS file system with RAID-Z redundancy logic in the SNAS function.
RAID-Z combines multiple physical data storage devices into a single logical drive to enhance fault tolerance and performance. It operates similarly to other RAID systems but possesses certain distinctive characteristics:
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It is exclusively designed for the ZFS file system and can only be utilized with it.
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The functionalities of RAID-Z are directly integrated into the ZFS file system.
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It employs dynamic bandwidths instead of fixed block sizes.
RAID-Z leverages ZFS capabilities for automatic data self-healing:
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With each read operation of a block, the checksum is verified.
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In case of discrepancies, parity information is employed to identify and correct corrupted data.
Due to its secure design, RAID-Z offers several advantages over traditional RAID:
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Elimination of the "write-hole" issue through the copy-on-write mechanism of ZFS.
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Enhanced data integrity through additional checksums at the file system level.
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Increased flexibility in configuring storage pools.