NonStop Operations Guide for H-Series and J-Series RVUs

16 Power Failures: Preparation and Recovery
• “When to Use This Chapter” (page 170)
• “System Response to Power Failures ” (page 170)
“NonStop Cabinets (Modular Cabinets) ” (page 171)◦
◦ “External Devices ” (page 171)
◦ “ESS Cabinets” (page 172)
◦ “Networking CLIMs” (page 172)
◦ “Storage CLIMs” (page 172)
◦ “SAS Disk Drive Enclosures” (page 172)
◦ “Air Conditioning” (page 172)
• “Preparing for Power Failure” (page 172)
“Set Ride-Through Time” (page 173)◦
◦ “Monitor Power Supplies” (page 173)
◦ “Monitor Batteries” (page 173)
◦ “Maintain Batteries” (page 173)
• “Power Failure Recovery” (page 174)
“Procedure to Recover From a Power Failure” (page 174)◦
◦ “Setting System Time” (page 174)
• “Related Reading for Power Failures” (page 174)
When to Use This Chapter
Use the chapter for information about how to prepare for power failures and how to recover if a
power failure occurs. If you have a Telco system, contact your service provider for information
about how to prepare for power failures and how to recover if a power failure occurs.
NOTE: For NonStop BladeSystems that shipped before J06.10, there are new recommended
configuration settings that your service provider can implement to help avoid startup problems that
might occur following a power outage. For more information, refer your service provider to
Configuring NonStop NS2200 Series and NS2100 Systems and NonStop BladeSystems to Avoid
System Startup Problems, located in the internal Service Procedures collection of NTL.
System Response to Power Failures
OSM Power Fail Support
When properly configured, OSM power fail support for NonStop NS-series systems and NonStop
BladeSystems includes detection and monitoring of an outage and, if conditions dictate, a controlled
shutdown of I/O operations and processors.
This shutdown does not include stopping or powering off the system, nor does it stop TMF or other
applications. (HP encourages customers to execute scripts to shut down database activity before
the processors are shut down.) The goal is completion of disk writes for I/Os that passed to disk
170 Power Failures: Preparation and Recovery