Chapter 2 ā Architecture Overview High-Availability Configurations
December 2019 User GuideāSpectra T200, T380, and T680 Libraries
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Redundant Power Supplies
The library requires one 5/12 VDC power supply per installed DBA.
Installing a second power supply per DBA, in combination with the dual
AC power inputs, provides 2N redundancy and failover protection. If four
or more power supply modules are installed, up to two power supplies can
fail. The surviving power supplies load-share in order to provide sufficient
power to the DBAs to allow backups to continue until the failed power
supplies are replaced.
The library has both a primary and a secondary AC power input. When
using a redundant AC power configuration, each input is connected to a
separate branch circuit, which allows for failover in the event of a power
failure in one of the circuits.
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