Glossary – Dell PowerEdge R320 User Manual
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Glossary
ACPI
See advanced configuration and power interface.
active control module
For Dell EqualLogic PS Series arrays in a dual-control module array, the control module that 
is actively servicing I/O on a network. If it ceases to function, it fails over to the secondary 
control module. See secondary control module.
active Controller
The Dell AIM Controller that is actively managing the Dell AIM environment.
active space
In Dell Compellent Storage Center, the amount of space that is used by a volume, excluding 
replays. This amount does not include RAID overhead. See Replay.
actual space
In Dell Compellent Storage Center, the amount of active space plus replay space for a 
volume. See active space, Replay space.
advanced configuration 
and power interface 
(ACPI)
A standard interface for enabling the operating system to direct configuration and power 
management.
agent
In the Dell AIM environment (VMRacks based on Red Hat Xen and Microsoft Hyper-V, plus 
personas), the optional software installed on elements that the Controller uses to manage 
the elements and configure their networking properties.
agentless persona
A Dell AIM persona that does not have the Dell AIM agent installed.
ambient temperature
The temperature of the area or room where the system is located.
array member
A Dell EqualLogic PS Series array configured into a PS Series group. Groups can have 
several members.
array serial number
In the Dell EqualLogic PS Series array environment, a unique Dell EqualLogic PS Series array 
identification string that is encoded in the array's hardware. See service tag.
ASM/ME
See Auto-Snapshot Manager/Microsoft Edition.
ASM/VE
See Auto-Snapshot Manager/VMware Edition.
Asset Management 
Appliance
A Dell KACE appliance-based asset management solution for IT professionals that tracks 
software and license compliance. It automates the management of inventory, software 
assets, versions, upgrades, and computers through a web-based dashboard.
asset tag
An individual code assigned to a system, usually by an administrator, for security or tracking 
purposes.
Assigned Disks
In Dell Compellent Storage Center, physical storage media assigned to a disk folder in order 
to become managed and used for storing volumes and replays. See disk folder, Storage 
Pool.
assignment mode
A mechanism to control how personas and VMRacks are assigned to hosts based on the 
availability of HBAs in the host. See HBA.
async/asynchronous 
replication
The process of writing data to local storage then queuing that data for storage on a remote 
SAN. If the local SAN fails before a write is delivered, it is possible that the replication will 
fail. See replication, synchronous replication, remote instant replay.
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