HP StorageWorks 2/128 HP StorageWorks SAN Director 2/128 Installation Guide, V - Page 21
Reliability
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Overview Reliability The SAN Director 2/128 uses the following error detection and correction mechanisms to ensure the reliability of all data inside the chassis: ■ Power-on self test (POST) ■ Error Detection and Fault Isolation (EDFI), such as cyclic redundancy checking (CRC), parity checking, checksum, and illegal address checking ■ Dual control processors that enable hot, nondisruptive fast firmware upgrades Each control processor contains two serial ports and one Ethernet port. Offline control processor diagnostics and remote diagnostics simplify troubleshooting. The standby control processor continuously runs diagnostics to ensure it is operational, should a failover be necessary. ■ I2C monitoring and control, used between Integrated Circuits (IC) to monitor how they are working. SAN Director 2/128 Installation Guide 21