SAS Disk Enclosures With a Rack-Mounted UPS
In this supported configuration, only SAS Disk Enclosures are protected by the rack-mounted
UPS. The rack(s) with SAS Disk Enclosures and/or Storage CLIMs are supported by one or more
rack-mounted UPS.
shows an example of a supported configuration in a NonStop system with the left PDUs
connected to the rack-mounted UPS, and the right PDUs connected to the utility power. The
rack-mounted UPS is connected to the utility power.
Figure 35 SAS Disk Enclosures With a Rack-Mounted UPS
When the utility power fails, the NonStop system powers off without an OSM-initiated controlled
shutdown of the I/O operations and processors. Only the products in the rack with the
rack-mounted UPS remain powered on. All completed disk write transactions’ data are written
to the disk drive media or the disk drive write cache. The rack-mounted UPS provides the extended
time for the disk drives to transfer the data from their write cache to the media. The rack-mounted
UPS provides extended time for the disk drives to transfer the data from their write cache to the
media preventing loss of data.
114
UPS and Data Center Power Configurations
Содержание Integrity NonStop NS2100
Страница 48: ...Figure 11 Modular PDU Connections Without UPS 48 System Installation Specifications for NS2100 Systems ...
Страница 49: ...Figure 12 Modular PDU Connections With Single Phase UPS Power Distribution for NS2100 Systems 49 ...
Страница 52: ...Figure 14 Example of Bottom AC Power Feed Without UPS 52 System Installation Specifications for NS2100 Systems ...
Страница 53: ...Figure 15 Example of Top AC Power Feed Without UPS Power Distribution for NS2100 Systems 53 ...
Страница 55: ...Figure 17 Example of Bottom AC Power Feed With Single Phase UPS Power Distribution for NS2100 Systems 55 ...
Страница 91: ...Figure 30 Example 36U Configuration Without UPS and ERM Typical NS2100 Configurations 91 ...
Страница 107: ...System Down OSM Low Level Link 107 ...