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Chapter 2 — Architecture Overview
Global Spare Drives
The BlueScale Global Spare feature provides a way to remotely substitute
an available TS11xx technology or Fibre Channel LTO drive in the library
for a failed drive of the same type. The feature lets you configure an
installed drive as a designated spare for other drives in the library. This
drive can then be substituted for a failed drive in any partition that is
configured to use the Global Spare drive. When a drive fails, you simply
log into the BlueScale web interface from any location, select the Global
Spare option for the failed drive, and continue normal operations. You can
then physically replace the failed drive at your convenience. See Assign
Global Spare Drives on page 176 and Using a Global Spare Drive on
page 355 for more information.
Redundant Power Supplies
The library requires one 5/12 VDC power supply per DBA with an
installed drive. Installing an optional N+1 power supply, where N is the
number of DBAs with drives installed, provides redundancy and failover
protection in the event that a single power supply fails. In a library with
three DBAs, 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 main frame requires one 24 VDC power supply to provide
power for the library robotics, motors, fans, and interior LED light bars. An
additional 24 VDC supply can be installed to provide redundancy.
The main frame and each drive frame have both a primary and a
secondary AC power input. When using a redundant AC power
configuration, each input for a frame is connected to a separate branch
circuit, which allows for failover in the event of a power failure in one of
the circuits.
August 2019
High-Availability Configurations
User Guide—Spectra T950V Library
70
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Table of Contents
Troubleshooting
