The protection levels available are based on the number of nodes in the cluster and follow the Reed Solomon Algorithm.
Block addresses are generalized 64-bit pointers that reference (node, drive, blknum) tuples.
The only piece of metadata that is replicated on every node is the address list of root btree blocks of the inode mapping structure.
Starting with OneFS 8.1.0 and Gen6 models, Isilon again offers Ethernet back-end network (10, 25, 40, or 100 Gigabit).
[5] Data, metadata, locking, transaction, group management, allocation, and event traffic are communicated using an RPC mechanism traveling over the back-end network of the OneFS cluster.
OneFS supports accessing stored files using common computer network protocols including NFS, CIFS/SMB, FTP, HTTP, and HDFS.