NonStop NS2400 Series Planning Guide

Non-Supported UPS Configurations
This section identifies non-supported UPS configurations and explains why those configurations
are not supported. It also explains what you must do to prevent data loss.
CAUTION: When disk drive write caching is enabled in the NonStop system, do not use any of
these non-supported UPS configurations. They might result in data loss.
• “NonStop System With a Data Center UPS, Single Power Rail” (page 194)
• “NonStop System With Data Center UPS, Both Power Rails” (page 195)
• “NonStop System With Rack-Mounted UPS and Data Center UPS in Parallel” (page 197)
• “NonStop System With Two Rack-Mounted UPS in Parallel” (page 198)
• “NonStop System with Cascading Rack-Mounted UPS and Data Center UPS” (page 199)
Non-Supported UPS Configurations 193