Functionality

The Silent Brick System uses Erasure Resilient Coding (ERC) as a storage method in the functions.

• Virtual Tape Library

• Compliant Archive (not Silent Brick Pro)

• SNAS ERC

Data is split into fragments, expanded with redundant data pieces, and re-encoded. The data is then distributed across multiple storage devices. This method ensures high data security.

The Silent Brick System has a digital audit function for data verification. Each individual bit of the stored data is regularly and automatically checked for errors. Due to the high redundancy reserves of the Silent Brick Library, a affected hard drive can be repaired or shut down during operation without data loss.

The Silent Brick Storage Containers are equipped with storage devices from different production batches. Thus, data loss due to batch errors is prevented.

The Silent Brick System uses the ZFS filesystem with the redundancy logic RAID-Z in the SNAS function.

RAID-Z combines multiple physical storage devices into a logical drive to increase reliability and performance. It operates similarly to other RAID systems but has some special features:

• It is exclusively designed for the ZFS filesystem and can only be used with it.

• The functions of RAID-Z are directly integrated into the ZFS filesystem.

• It uses dynamic bandwidth instead of fixed block sizes.

RAID-Z utilizes ZFS features for data self-healing:

• When reading a block, the checksum is compared.

• In case of deviations, the parity information is used to identify and correct faulty data.

Due to its secure structure, RAID-Z has several advantages over traditional RAID:

• Prevention of the "Write Hole" effect through the Copy-on-Write functionality of ZFS.

• Better data integrity through additional checksums at the file system level.

• Greater flexibility in configuring storage pools.