Sun Microsystems StorEdge 6920 System, Getting Started Manual, Page: 130 / 144

112 Sun StorEdge 6920 System Getting Started Guide • May 2004
concatenation A storage allocation method in which sequential blocks on a disk are linked
together as a logical device. This method combines the storage potential of
several physical devices. See also
striping .
controller tray A tray with an installed RAID controller. In a Sun StorEdge 6920 system, a pair
of controller trays is the smallest possible storage array configuration, the 2x2
array type.
controller unit The card that manages RAID functions and failover characteristics for an array,
tray, or group of trays.
control path The route used for communication of system management information, usually
an out-of-band connection.
customer LAN See site LAN .
DAS See direct attached storage (DAS) .
data host Any host that uses the system for storage. A data host can be connected
directly to the system (DAS) or can be connected to an external switch that
supports multiple data hosts (SAN).
data path The route taken by a data packet between a data host and the storage device.
Data Services Platform
(DSP) The controller component of the Sun StorEdge 6920 system, which consolidates
and virtualizes storage so that all storage in the system can be managed like a
single scalable entity.
dedicated hot spare A disk that serves as the hot spare for one and only one virtual disk in a tray.
direct attached storage
(DAS) A storage architecture in which the systems that store data are connected
physically to storage elements.
disk
A physical drive component that stores data.
domain See storage domain .
DSP
See Data Services Platform (DSP) .
event A notification of something that happened on a device. There are many types
of events, and each type describes a separate occurrence. See also
alarm and
alert .
expansion cabinet A cabinet, pre-wired with Ethernet, Fibre Channel, and power cables,
connected to the base cabinet to increase storage capacity. A power
management cable connects the service panels of each cabinet, and the Fibre
Channel/Ethernet cable connects the I/O panels of each cabinet.
expansion tray A tray that does not have a RAID controller, used to expand the capacity of an
array. This type of tray must be attached to a controller tray to function.