Reliability; Serviceability - IBM System Storage SAN384B-2 Installation, Service And User Manual

The high-availability software architecture of the SAN384B-2 provides a common
framework for all applications that reside on the system, allowing global and local
status to be maintained through any component failure. High-availability elements
consist of the High Availability Manager, the heartbeat, the fault/health
framework, the replicated database, initialization, and software upgrade.
The High Availability Manager controls access to the standby control processor,
facilitates software upgrades, prevents extraneous CP failover activity, closes and
flushes streams, provides flow control and message buffering, and supports a
centralized active and standby state.

Reliability

The SAN384B-2 uses the error detection and correction mechanisms to ensure
reliability of data:
v Error Detection and Correction over main control processor memory.
v Error Detection and Correction mechanism, which checks for encoder errors and
v Power-on self test (POST)
v Dual control processors that enable hot, nondisruptive fast firmware upgrades
v Each control processor contains one serial port and two Ethernet ports, for
v Bus monitoring and control of blades and other field-replaceable units (FRUs).

Serviceability

The SAN384B-2 provides the features to enhance and ensure serviceability:
v Modular design with hot-swappable components
v Flash memory that stores two firmware images per control processor
v USB port on control processor blades for most tasks that formerly required an
v Nonvolatile random-access memory (NVRAM), containing the OEM serial
v Background health-check daemon
v Memory scrubber, self test, and bus ping to determine if a bus is not functioning
v RASlog messages
v SMI-S compliant
v Hardware and software watchdog timers
v Status LEDs
v Predictive diagnostics analysis through Fabric Watch
v SNMP (including version 3) integration with higher-layer managers
v Vertical cable management finger assemblies to accommodate the horizontal
8
SAN384B-2 Installation, Service, and User Guide
fault isolation (EDFI), such as cyclic redundancy checking (CRC), parity
checking, checksum, and illegal address checking.
management and for service. The standby control processor monitors diagnostics
to ensure the system is operational should a failover be necessary.
FTP/SCP server, including software and firmware upgrades.
number, IBM serial number, revision information, and part number information
orientation of the blades