Dell Compellent Series 30 - Manual (Page 445)

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Transport Type
The protocol used to communicate data between the Storage Center and attached servers.
Tunneling (Storage tunneling)
FC SAN frames are encapsulated in IP packets for transport to another FC SAN
U
Unassigned Disk
Disk drives that have not been assigned to a managed disk folder and therefore cannot be used by the
system.
Unmanaged Disk
Same as unassigned disk.
UPS
Uninterruptible Power Supply. A power supply that includes a battery that will keep Storage Center running
in the event of a power outage. Power from the battery will last long enough to save data in RAM and shut
Storage Center down gracefully.
V
View Volume
A volume that has been recreated from a previous Replay. Refer to Creating a View Volume on page 321 .
Virtual Port
Virtual Ports eliminate the need for reserve ports. When operating in Virtual Port mode, all front-end ports
accept IO and can be part of one
Fault Domain . For information on enabling Virtual Ports, refer to the
Storage Center 5 Setup Guide.
Virtualization
The amalgamation of multiple network storage devices into what appears to be a single storage unit.
Virtualization makes tasks such as archiving, back-up, and recovery easier and faster. Virtualization is
implemented through the Storage Center controller software. Also, the ability to span volumes across any
number of physical disks. A logical representation of physical storage assets.
Volume
A volume is a discrete area of storage striped to multiple hard disks.
Volume Type
Volume Type: can be dynamic, Replay enabled, or Replication. A volume is dynamic until at least one
Replay has been taken of that volume. Once a Replay has been taken of a volume, it becomes Replay
Enabled. A Replication volume is one that is being Replicated to another Storage Center system.