About the Symantec
Storage Shelf
This chapter includes the following topics:
■ Understanding the Symantec Storage Shelf
■ Symantec Storage Shelf specifications
■ About the storage shelf front panel
■ About the storage shelf rear panel
Understanding the Symantec Storage Shelf
The Symantec Storage Shelf is a 3U, RAID-compatible, 16 drive expansion system.
Symantec Storage Shelves are used to provide additional storage for NetBackup
5230, 5220, and 5030 Appliances. Storage shelves support the backup and RAID
management functionality that is installed in the NetBackup appliance. They connect
to the appliance through SAS technology.
The storage shelf includes two power supplies and two I/O modules. The power
supplies provide power and cooling for the unit. Load sharing is used during normal
operations to provide power for the storage shelf. If one power supply fails, the
other power supply automatically provides the load for the entire system until the
failed unit is replaced.
The I/O modules provide the SAS interface for the data. Load balancing is also
used. If one module fails, NetBackup operations continue although performance
can be affected during periods of high activity.
The drive in slot 16 in the storage shelf is held in reserve as a hot spare. If any drive
in the storage shelf fails, the hot spare is activated to replace the failed drive. RAID
parity information is used to reconstruct on the hot spare the data that is stored on
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