Adaptec 5325301507 - Snap Server 4400 NAS, Administrator'S Manual

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Expansion Arrays
Chapter 4 Storage Configuration and Expansion 65
Managing Expansion Array Storage
Disk drives on expansion arrays are not preconfigured, but are shipped as
unassigned disk drives, allowing administrators to configure the array as
appropriate.
The
Storage > Disks/Units
screen displays the head unit and any expansion arrays
attached to the head unit. For more information about the Disk/Units screen, please
see “Disks and Units” on page 67.
The disk drives of an expansion array are completely integrated into the host
SnapServer’s logic. The default RAID configurations can be deleted and the internal
and external disk drives recombined as necessary. For example, to create one large
RAID, you could delete the existing RAIDs on both the host server and the
expansion array, then combine all drives into one high-capacity storage system.
This configuration reduces administrative complexity and overhead, but the failure
of any one unit in the system (due to a cable coming loose, for example) will render
the entire RAID inaccessible. This configuration also increases the potential for