Operating System Software User Manual

Figure 52 VMware vMSC Certification—Uniform Host Access
Uniform host access provides:
• Protection against storage failure
• Active load balancing
Handling Automatic Transparent Failover
To handle automatic failover, each HP 3PAR StoreServ stores its individual quorum state. Quorums
can be in one of the following states:
• Not started
• Initializing
• Started
• Failover
• Failsafe
The failure of HP 3PAR StoreServ array A will result in loss of remote-copy links and updates to the
quorum witness. A peer-persistence failover is automatically initiated on HP 3PAR StoreServ SystemB,
which now becomes the source. When HP 3PAR StoreServ SystemA recovers, and remote-copy
links are re-established, SystemA notices that SystemB is now the source. See Figure 53 (page 144).
HP 3PAR Peer Persistence Quorum 143