High Availability And Redundancy - HP StoreAll 8800 Administrator's Manual

Dual redundant paths to all storage components
Gigabytes-per-second throughput

High availability and redundancy

The segmented architecture is the basis for fault resilience-loss of access to one or more segments
does not render the entire file system inaccessible. Individual segments can be taken offline
temporarily for maintenance operations and then returned to the file system.
To ensure continuous data access, StoreAll software provides manual and automated failover
protection at various points:
Server. A failed node is powered down and a designated standby server assumes all of its
segment management duties.
Segment. Ownership of each segment on a failed node is transferred to a designated standby
server.
Network interface. The IP address of a failed network interface is transferred to a standby
network interface until the original network interface is operational again.
Storage connection. For servers with HBA-protected Fibre Channel access, failure of the HBA
triggers failover of the node to a designated standby server.
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