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High Availability and Data Protection with Dell PowerScale Scale-Out NAS
Executive summary High availability and reliability at the petabyte scale High availability with OneFS OneFS fault tolerance
File system journal
Protective device failure
Data integrity
Protocol checksums
Dynamic Sector Repair
MediaScan
IntegrityScan
Fault isolation
Accelerated drive rebuilds
Automatic drive firmware updates
Rolling upgrade
Nondisruptive upgrades
Parallel upgrades
Rollback capable
Performing the upgrade
Data protection
High availability and data protection strategies Summary OneFS glossary

Protocol checksums

Protocol checksums

  • In addition to blocks and metadata, OneFS also provides checksum verification for Remote Block Management (RBM) protocol data. The RBM is a unicast, RPC-based protocol developed by Dell for use over the back-end cluster interconnect. Checksums on the RBM protocol are in addition to the hardware checksums provided at the network layer. They are used to detect and isolate machines that have certain faulty hardware components and exhibit other failure states.